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Forum: Pentax K-30 & K-50 07-25-2019, 12:09 PM  
K-50 / K-500 Aperture Solenoid fix (DIY with pics)
Posted By dem5867
Replies: 417
Views: 109,540
MarkJerling; "Don't fix it if it ain't broke." I think you're right. I'm hoping to keep the K50 as a backup !!

Not that I'm looking to buy new , especially of here in the USA , so I'm asked if anybody knows if companies still do if you didn't by it in the US it's grey market and the warranty will not be valid in the US ?? If so are the Japanese new cameras grey market also ??

"There is a risk, but it would be a considerably lower risk than with the K-30 and K-50."

So am I hearing the there is a consensuses that the feeling is that the K70 definitely has less chance of having a solenoid issue ??

For me I kind of decided , I'm hoping to find a K70 with the aperture issue ,, yet If I see a used one that at the right price I'll pop for it.. It comes down to I've always loved my Pentaxs , I have years invested in Pentax lenses and accessories, the K70 has the features I want , I have parts and know how to do the repair, age
(My), so I think it's best to stay with the animals that I know..

What I was / am / will be worried about is that like me somebody don't know they have an issue.. I can't tell you how much of an idiot I feel like, I've been shooting for 40 years , I should have caught it years ago.. In my defense the early days it's was very intermittent, yet I have a wedding shoot that the church which was darker than the reception hall were the few pictures in the church came out good yet almost none of the hall came out at all, I should have noticed that !! Film day artifact I'm sure I don't look at the previews on the LCD screen , I most times wait till I download them to the PC weeks later, no competition like in my film days.. I need to make checking the previews a habit..
Forum: Pentax K-30 & K-50 07-24-2019, 06:35 AM  
K-50 / K-500 Aperture Solenoid fix (DIY with pics)
Posted By dem5867
Replies: 417
Views: 109,540
Yes, I do babble [A lot],, and a lot of times it's TMI and causes confusion.. I will try to keep things short !!!
Thanks for the feedback..

I feel like an and moron,, My K50 was broke for sometime and I was clueless about it !! 85 / 90 % of time I use the camera outdoors and there are only a few shots (That I didn't delete..) from outdoors appear to be darker then maybe they should be,, I just thought the camera took richer color pictures then my other cameras , personally I thought looked great, richer color.. yet I've been to a couple of functions were when I looked at the pictures I ended up deleting more pictures than I kept, not thinking thru I blamed it on operator error , not correcting for the back light coming thru the windows.. One of the sites I have shot many times under the same outdoor lighting coming thru the windows. Never even considered a problem with the camera.. Now that I remember I just want to get it out there that if like me you think you're having a back lighting issue , you may want to do the check on it to insure it's not the aperture problem.. I've owned enough cameras I should have catch it !!
Forum: Pentax K-30 & K-50 07-23-2019, 03:42 PM  
K-50 / K-500 Aperture Solenoid fix (DIY with pics)
Posted By dem5867
Replies: 417
Views: 109,540
My mistake wrong term "The sound is maybe a bit snappier" your right it sounds snappier them the green one did..

"I did a search worldwide for completed listenings of K-70's "for parts or not working": you're right as soon as the posted there gone the last one was posted 3 days ago and sold for over $400us in less than 12 hours, as I stated I've been following them !! and there have been a few listed that one has to read the details, which is a hassle..

If you get better pictures with the K-01 than with the K-50, I would guess that something is either wrong with your K-50

I think you're right again , I think it's dust or dirt , It doesn't appear to be or the mirror,, I haven't looked for the AF sensor , maybe you can point me to were it might be ??

When I used the word hardly on the K50 I've put over 4000 shots on it compared to the ~7000 shots I put on the K20, My Super Program has well over 10,000 , My buddy that passed and I would go out almost 40 {Some weekday evenings also.} or more weekends shooting 3 to 5 36+ rolls of film and developing it during the week, did that for some 5+ years, He did shot professionally at functions with his medium format cameras , and used his A-1 most times he came out with me.. The K-01 it's sad it's a great camera , and if I could find any complaint it would be how much clearer the pictures in reality as to the way the look on the LCD I'm sure it's not an issue with the camera ,, I think the K50 looks the same when using live-view which I use only when see thru the viewfinder which isn't very often !! I kind of tried to get the wife to use the K-01 she didn't like the feel of it and like me kept putting up to her eye,, old habits die hard or can't teach an old dog new tricks !!

"Japan, which as I mentioned "is a different cup of tea" and I am not going to exlain now how Japanese dealers work" and why is that ,, as far as I can see there selling the same used K70s as everybody else. So unless they stole them or got them illegally some how ,, how are they different cameras USA dealers that I searched are carrying used K70s with both low and high shutter counts , the only difference I see is that the USA vendors for the most part appear to be listing there K70s really close to there new K70 selling price point, (>$650 ) and the ones doing that have some of the highest prices for new K70s, so what would one pay over $600.00 for a used K70 when other are selling them new for under $600 ??

"Also your claim that there is no way to tell now many K-70's are going to fail... yes, there is a way:
As the aperture mechanism is the same as in the K-S1 and K-S2 as well as the K-30 and K-50 and as there are hardly any failures with the K-S1 and K-S2 this is actually the way!" Wrong only time well tell , and your logic is iffy at best 1st as I stated there have been no failures of the pre- K20 and as I stated the few I found were in the end blown off as some type of operator error !! So how many pre-k20 are there in there world , how long have they been out there ?? OK hardly means there ones that you know of !! How many don't you know of , one can only guess ,, how many years has been that the K-S1 and S2 been out ?? So if I did my math right 0/over who knows * time ,,I would say more than one is an issue,, especially when the issue has been found and can be easily corrected yet , Pentax has continued so that to mickey mouse a know bad part to work as a known good part.. I've worked for several large companies and a few small that did the same thing , and with time it cost them a bundle or there no longer in business !! I sure nobody will disagree that the new part is junk and more than one failure is to many..

"But if I am pissed about Pentax for whatever reason for I don't want to read nice things, I will search for the bad things... thats how it usually just works.
But this is not research then... but quite the opposite. No value in this." Maybe you're not pissed at Pentax ,, Yet I'm betting anybody that has had a K30 - K70 fail is. In fact if I was pissed at Pentax why would I be looking for a K70 ?? I was thinking of jumping ship not because of the aperture issues at the time I didn't even know there was a problem. The 2 reasons I almost jumped ship is 1. Is I been trying to get a used Sigma 4.5mm for Pentax mount ,, yet the only ones used for a good price appear to be Canon and Nikon I've seen both for under $500us a couple of times, Yet the Pentax mount 4.5mm there's been very few posted used and the ones posted are going at >$600us , new $699->$1,200, and less and less camera shops here in the USA are carrying Pentax mount lenses.. 2. Pentax has been gone how my local electronic shops for sometime now, and the very few camera shops left close to me that I can stop in and look around most times only has newer display models with no stock for sale , yet I noticed that it's not just Pentax,, it's most brands , one of the camera shops seems to be only carrying a few low end and a few high end models, mostly Nikons and 1 or 2 Canons , that was about a year ago and I don't even know if there still opened.. Hunt's and Abe's of Maine are most likely the closest open shops around me and both are >70 miles away.. Both great places to shop,, yet a little bit pricey (Have to be to keep the doors open in this market.) , they most times have what you're looking for or something the will work.. I'd say there are 3 reasons yet the third reason is why I stay with Pentax, the failure of the K50, I've only had have a few problems with any of my Pentax bodies and each time I was able to fixed the issue quickly and easily (My Super Program has taking so many beatings it isn't funny , it has dings , the white panel for the viewfinder LCD lighting is pushed in and epoxied from the outside, basically looks like crap, it's had beer dropped on it , been way out on the ocean with slat spray, beaches with sand and so much more.. People I know not as daring as I am have had problem with there cameras and sent them to be repair ,most times after getting them back trashed them,, most were out of warranty when they trashed them.. My buddies A-1 had a issue (If I remember it was something to do with the shutter , I think it was cloth and ripped.) Not sure if the shop repaired it or if it was sent to Canon ,, it worked fine when he got it back , he did comment that the black screws on the camera clearly looked like the camera was opened, it worked fine for many more years , my comment on the A-1 It's a tank compare to the Super Program,, big, heavy, loud,, yet a solid performer and the long shutter made for some interesting color shifts..

I did not post to argue with you !!
I should have asked what is the chances that I would purchase a faulted K70 used or new..

Because I'm sure my camera has had a problem for a while , I didn't notice it or as I stated I thought it was a metering glitch, over the last couple of years I mostly shot outside,, only a few shots,, yet it sat for sometime I was using go-pro clones it's small and people just don't seem to be intimidated as much, plus I use a Lytro (Mostly likely spelled wrong..) that I've been using,, odd camera at best,, anyway the week before the K50 went total, I was at a baseball game and the pictures came out good maybe one failure , the next week I went to a indoors birthday party and it crapped out at first I tough I had a setting screwed up because the light coming thru a window was overexposed as I expected it would be yet everything in the room was way underexposed.. It was the aperture issue.. I got home looked the problem up on the internet and came up with many posts about the issue, and because of several get post within a day my K50 was up and running ,, I believe it was your post that I found to be the best !! Yet I wish I would have read the "A LITTLE BIT OF HISTORY: Development of the solenoid in Pentax cameras." a little closer ,, I had asked on one of the forums if any of the 35mm bodies had the solenoid and I was told there was none , yet it appears that in this post or in the post about the history , it seems like it was stated that some have had some luck with one from a MZ,, Is that confirmed and does anybody know if that fix(es) are still working today ???

I posted so I could get a felling of what others thought about any K70 failing, I didn't expect to open several days of worms !! I was hoping for an option of what others tough about it ! I don't understand why you appear to be taking it so personally !! If I wanted to be personal and ask "how do you know what us going on at Pentax ,,You stated that Pentax couldn't use another manufacturer yet it appears to me the long over patent is in Ashii's (Pentax) name ,, I'm sure most would agree with me that if there's was years of NO documented online about any bodies pre-K30 and now there's even a few (As you state.) post-K20 failures the issues hasn't been corrected , at better companies I worked at If we had no failures and them started having failures the problem would not be considered fix until we were back to zero,, more times than not somebody in the financial chain found a part or process that was cheaper didn't understand why, didn't ask why, just did it !! It always amazed me that some poor person only doing there job or doing what they were told to do , getting the walk,, when most times the finger really pointed else were !! I asked about your resources only because the name of the company stated to make the parts still has the same white style part shown on there web site and one of my early jobs used to order samples of parts that engineers wanted (That's what my job was,,wish I could find a job like that today, it was a fun and cool job..) if I called and the manufactures representatives told me that the picture or ad was just a put on , those engineers would go out of there way not to use there products for wasting theirs and my time,, I could email them if you want me to, I'm betting that they would say they can still supply the part as it looks on there web site.. I don't know about the rest of the world yet in this country to advertise something you don't have is a crime,, False Advertising !! So I'm thinking maybe they just might keep the web site up to date ,,Just guessing ??

So you're wrong about about my feelings for Pentax ,, I've always put my Pentaxs up against other cameras , Size and handling is what I 1st. notice , followed by the lack of lenses and accessories they have , most camera companies change there mount with almost every series they come out with or so it seems. I am worried that Pentax is going to go out of business,, yet I have years of investment, I love my pentaxs , and have always had good thing so say about Pentax and cameras ,, what I am saying is that one body really knows for many have failed or how many will have (Real numbers no your guessing of the few failures you know of !!!) !!

I posted because I not as trusting as you are and I question how many cameras are listed because of this failure and my exact comment was there seems to be more used or per-owned K70s listing on Ebay them any other pentax and yes if I take out Japan (Which once again they don't have as many other used or pre-owned Pentaxs older cameras as K70s..) the number is smaller , yet if we exclude the whole world we will have not K70s failure which is what it appears you're trying to say,, As I stated show me real numbers !!

I know I didn't realize my camera was broken ,, how many people do you think don't know they have an issue or know they have am issue and just don't want to report it.. I don't know how it is in your country yet in this country most people who go out and by a nice camera , purchase it base on a event (Birthday, Birth, wedding , ETC.) and than it ends up in a closet or attic, and like myself when I purchase my 1st. camera ,, I wanted an A-1 just like my buddy , I knew nothing about SLRs and the salesman made many very good points about why the Pentax was better (And it just looked better than the A-1, Lighter,,) so I bought the Pentax Super Program, I on occasion thought I made a mistake ,, yet today I know it was the right option , and the reason for the post I was hoping to get an objective opinion on what the chances are of getting a problem camera.. What I'm not going to pay >600+ to purchase a new camera that I'm going to have to open.. Second I've had great luck with my used Pentax purchases.. so knowing what I know now and having let a few slip thru my hands , I'd purchase a K70 with the aperture issue, it appears I'm not the only one who is willing to open a camera !!

Trust: do I really think somebody would list something that was broken as not !! Well I would hope not , yet some may not know, and at the camera stores a lot of times they take in a trade from somebody upgrading so I'm sure sometimes things get missed and maybe some tech.s just don't know what to look for so , I don't think that has anything to do with trust and yes I've gotten used items that have an issue or to and most times it was just missed.. Saying that I'd be foolish to think that it couldn't happen..

Lastly , I to think Pentax is close to doom , It's sad yet I don't think it's only Pentax ,, It appears that Nikon posted lower earnings this week,, bummer ! It looks to me like DSLRs are going the way of the 8 track tape, I wondering if there will still be a 3 camera market,,

So after all this , I still don't have an answer to my question ,, asked the correct way , and now it turned into 2 questions !!

1. Now that it isn't as important ,, what do you all think this chances of getting a new or used K70 that has the aperture issues ??
2. If you purchased a K70 used and it didn't appear to have the problem , would you replaced the green solenoid as soon as you got the camera or would you wait until you have issues ??

Jeallen01, I don't want to drag you in this , yet it appears I'm not the only one who thinks that Pentax don't have a handle on this.. Maybe others have the same concern ?? Speak up or it will never be known..

photogem: It's clear your knowledge of the insides for Pentax cameras (Maybe others.) far exceeds mine, and that's not hard to do when it comes to camera's.. I now have open a total of like five cameras and fixed a couple of point and shoots by pounding the lenses to there in position , not very scientific, yet it appears to work.. {saw some wacko do it on UT..well I guess that makes me a wacko for trying it..}.. Not important , yet any idea why so many P&Ss seem to do that , is it something to do with the batteries dying ?? Anyhow I have questions on the K50 AF, a question on another K-01, and on focusing screens mostly Pentax brand and questions about what there made of.. I've read some of the post here on focusing screens yet have additional question that maybe others will or can chime in.. I'm only asking for your opinion as any for my bosses would tell you I always try to find the most and quickest information about something I can.. I'm thinking on the K50 and K-01 questions I should start a new post , If you know of a post talking about the focus system of the K50 or any that are the same please point me to it. The K-01 it's more of a is repair possible or is the body junk / parts I didn't look a lot but it appears nobody else has had the problem.. The focusing screen should I start a new post ?? I don't want to railroad somebody posts..

photogem Even though it may seem like I'm trying to beat on you I'm not ,, It's the one thing mostly bosses, everybody loves and hates about me is I asked questions and go out for my way to insure there true ,, I a ball in sales meetings !! and fellow engineers always tell me how much they love it when " Do you have documentation or someplace I can look it up.." Once in a while I find oddities like in a MOS-FET datebook I found a timeline that showed that there was very few failures of this part , I mean like 1 out of a 1m, yet I notice the timeline ended with the words "The end of time.." yet the data sheet clearly stated that the devices was rated at like 1 billion switchings norm. and 5 billion max. tpy. We were using the FET in a 1 MHZ switching power supply , I didn't do the math but it was clear to all of us the at 1 mhz. 5 billion isn't very long.. So I asked the sales engineer "how can a timeline be to the end of time when the part is only rated for 1 billion switches,, he told me he would get back to me about it, 36+ years later I'm still waiting.. So please don't take it personal,, It's just a camera and I would like to get the whole story from somebody at Pentax (It's not going to happen so your the next best thing..).. So I thank you once again for with out all your posts with history is the only reason a lot of us have working Pentaxs.. Believe me I wish there like yourself for other of issue I've had !! P.S I'm hoping my other questions aren't so controversial and we can keep them to a couple of small posts

DEM
Forum: Pentax K-30 & K-50 07-22-2019, 01:37 PM  
K-50 / K-500 Aperture Solenoid fix (DIY with pics)
Posted By dem5867
Replies: 417
Views: 109,540
did you read my whole statement low shutter counts and volume was basically what I said.. What I said was if one looks on EBAY there are more K70s listed than any other Pentax listed and I'm thinking 3 sold in >3 months seems low to me.. Lastly I've been following the K70s for months and there been several here at USA camera shops that have had K70 with low shutter counts, some even stated that they have underexposure issues.. If I knew what I know now I would have a K70, for less than $300.00..



Why's that, is Japan a different world ?? Does Japan have a special Japanese Pentax factory ?? Are you saying that the Japanese K70's better in some way then the K70s in the rest for the world ???



The only way to do as you call it "prober conducted research!" would be to purchase several K70s and test them or ask prospected sellers to do the test them,, you think there going to do it ,, would you want to find out you're trying to sell a broken camera ?? You're right the only research I conducted is from yours and many many more posts and discussions like this one and searching the world for a K70 at a great price because it seems to me that there's a good chance the aperture problems are just starting to show up,, I hope I'm wrong !!

My 1st. Pentax DSLR was the K20 (that I'm mod.ing for full spectrum..) fantastic camera.. I purchased the K50 sometime ago used , it had like 50 shots on it the person selling it to me told me that it was a present and it didn't seem as sharp as his Nikon DSLR, (thought he was crazy , the K20 was just so clear how could a more pixel camera not be sharp ??) well outside it took ok pictures some great some not so great , once in a while it would do a really dark picture view able but dark sometimes I would do 2 or 3 of the same shots and most times the others would come out ok, just thought it was just a metering glitch,, yet although sharp just not breathtaking as the K20.. inside it was a different story , the non-flashed pictures were all over the place mostly not sharp , well not as sharp.. once in awhile a unexplained dark picture.. Sometime shortly after the I purchased the K50 I purchased a low shutter count K-01 (Nice camera just can't get used to no viewfinder..), Funny looking at the pictures on the LCD just doesn't do the camera any justice, it really takes great pictures, they just don't look so great via the LCD..

Disappointed in both cameras I was hardly shooting at all even when I did take the K50, I even shot with my cell phone a couple of times.. Well at my grandson's 1st. birthday it broke.. I've been looking at used K70 and use surprised by two things 1. there seem to be more K70s used for sale than K50s,, 2. There seemed to be a lot of K70s with what to me seem to be low shutter counts (<3000),, at the time it just seemed to me to be odd,, didn't think no more about it.. Your right there does seem to be a lot both new and used from Japan (Don't understand what your trying to say about Japan sold cameras as far as I know there the same Pentaxes sold around the world..),, the only thing I noticed about the Japanese is there pricing seems to by all over the map with not apparent logic,, some are price low with high shutter counts (>5000) and low prices for low count ones and the reverse is also somewhat the same..

My K50, something I notice almost right away is the the shutter cycle seemed quieter than the K20, at the time I just thought ok Pentax made the K50 quieter,, yet it just sounded different click or other sound just sounded off, maybe mushy.. compared to the K20 and one cannot compare it to the K-01 (no mirror sounds).. The day I got home I googled about the cameras problem and I learnt about the problem.. of course I ordered several green replacements only to read more about the issue, that's when I remembered the K20.. Every time I time of opening a camera , I think of broken Timex watches , repairs just never end up well when I've try to repair them ,, something about rotary springs !! Based on a couple of posts , pictures and videos I moved the part from the K20 to the K50 , The bad news is the camera is much louder (It now clicks like the K20, maybe a touch louder.) the good news is the camera sounds better.. Well you know what I stupidly did with the bad one !!!

I need to thank everybody for all the great posts on the K30/K50 repair, for with out my K50 wouldn't be working..

As I stated above,, if I knew about the issue the day I got home with the broken K50 I would presently be in a K70,, that day in my searching for K70s (Really just looking I've been looking for sometime now..) there was one listed for $299.00 that clearly stated it had the aperture problem and oddly stated that the person he purchased it from said "It didn't take sharp pictures",, at the time I had never open a digital camera before (with the exception of a few P&Ps and well remember the watches), so I didn't jump on it ,, today it be mine.. The sharpness issue I don't see how the solenoid could be an issue causing that, and only I and the person on EBay are the only ones who seemed to comment about it , in my case I think there's dust or something in the AF path,, although it seems to do it less , it seems to hunt a lot when it gets close to focus, more so than the K-01 and the K20 pre-mod.

"Amateur Photographers (UK) Predicts End for Pentax.." I think it's the end of Pentax , I'm surprised there holding on.. Been to a electronics store in the USA in the last 5 to 10 years ?? Pentax hasn't !! See anybody other than Ricoh making Pentax mount items ??

What ever you want to call it fact , fiction , what ever pre-K30 and back even the few failures that were reported on this cameras were figured out to be mostly caused by some other issues, there has been failures of the K70 , I've not read about any repair done with the white solenoid, fail.. So if I did my research correctly there has been almost zero aperture faults reported pre-K20 with the white solenoid and there have been hundreds if not thousands of K30/K50 up to and including K70s with the green part mod.ed not not fail.. So at the end of the day there's no way to tell how many K70s are going to fail Having been thru many engineering issues with many companies , I just don't see with the engineering that went into the white part ,, that one will ever be able to mickey mouse the green part to work like the white part,, Ricoh is just buying time and it so sad your right "That's modern life. Not so easy to return." yet seems to me the truth is "There is no return.."

So the only proper conducted research I conducted was to read and read and read on the internet and my own personal experiences..
Forum: Pentax K-30 & K-50 07-21-2019, 05:31 PM  
K-50 / K-500 Aperture Solenoid fix (DIY with pics)
Posted By dem5867
Replies: 417
Views: 109,540
Well as I stated it was totally by mistake,, I have 2.5 new green ones on hand, yet I decided with the K20D to put a white one in, I have 3 of them.. The K20D is just such a nice body, I don't want to chance a green going bad and having to open the camera for a 3rd. time. How does one get .5 of a solenoid you ask ,, I was pulling the plunger out and it was stuck so tight that it flew out of my fingers.. The good news is it sounded like it stuck to some metal,, the bad news is the same ,, I have a ton of metal were it got lost..

"Photogem": Your statements are about how I feel between the white and green,, If I have an older 327 in the back yard you know runs , why would you by a junk yard motor that you don't know if it even runs ??

I have to say, after seeing the engineering and manufacturing of the white part compared with the green part , I'm totally bummed that Pentax {Ricoh} still insists that the mod.ed green part is as good as the white parts.. This I'm sure is penny wise , dollar foolish , for Ricoh.. Instead of putting there tail between there legs and go back to the original design at a buck or two per more camera , they'll spend thousand trying to mickey mouse the green ones to save a few cents at production... It just amasses me the if one looks for underexposed pictures some time pre-K30 , the K20d and back for sure one finds very few underexposed posts and mostly what one finds it appears that it's O.E.. Look at the K30 up (There have not been as many failures reported with the K70 , yet there has been some. The few K70 failures still appear to be using the same green solenoid mod'ed to work !! Look on EB , it appears that the K70 has the most used or pre-owned listings of Pentax DSLRs, a lot have very low shutter counts , I saw one with ~240 clicks and a lot are just under ~500 why are there so many people willing to give up what spec. wise is a great DSLR ??? Could it be there's more K70s out there with the aperture problems, then has been reported.

Lastly I hoping somebody can answer this for sure,, Does the KP not have the same aperture control system ??


TIA
Forum: Pentax K-30 & K-50 07-19-2019, 08:20 AM  
K-50 / K-500 Aperture Solenoid fix (DIY with pics)
Posted By dem5867
Replies: 417
Views: 109,540
I can confirm that putting a known failed green solenoid in a K20, fails as one would expect.. I was planning on putting a new non-mod.ed {by me.} green solenoid, yet age set in, I have some new green ones,, yet I have an old white one that I'm going to put in the K20.. I just don't think putting even a new green one in the K20 is smart, when I have a white one. I want / have to open the camera again , to fix the switches on the top deck , hopefully I will have deciding to replace the the microscope slide with, quart glass window , nothing or just leaving the slide..
Forum: Pentax K-30 & K-50 06-19-2019, 11:40 AM  
K-50 / K-500 Aperture Solenoid fix (DIY with pics)
Posted By dem5867
Replies: 417
Views: 109,540
Hi madphys;
Is there a list of what Pentax's can be robbed for "White Solenoid(s) ?? Does anybody know if the "X" series of bodies has them ?? I believe somebody stated that one of the old film bodies had the same looking (different color) item but it didn't work. How about the higher end film bodies like the Super Program, or any of the point and shoots,, etc. I guess if anybody has a bunch of part lists they could search by part number and see what comes up..

My take on the "Green" part,, first history tells the story look up "Pentax Aperture Lock" see what comes up Google tells all.. There apparently has been no failures in the istD thru the K200. There seems to be some question of if the K-x or K-r have the "Green" or the "White" ,, it's presently unclear , in searching I did see that some K-x models appear to have the issue, yet it appears if true it's very small numbers. When one compares the two , well one sees that there is no comparison the white parts are manufactured completely differently the white part had time put into it the machining , well there is machining, the magnet is different and located in a different location. The coils of the white (seen 5) one are strait , the green (I've only seen 2) , the green used one the coils are closure at one end , a new part they appear to be straight, so my guess would be that after time the green one distorts {Has anybody replaced a green that the coils were strait ?}. Small note on the white ones there coils are not as nicely wound (could indicate that the green part was wound to look pretty and not wound to spec.).

Lastly has anybody put a non-modded green part back into a D20 or istD ??? Did it work better ?? I ask because I'm going to pullthe IR filter, and I don't want to waste a good "White" part. Instead of modding the green part by sanding or soldering with like some foam in the bottom of the u on the plunger or maybe build up some NU metal in the same location ?


TIA
DEM
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