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Forum: Pentax Camera and Field Accessories 02-01-2010, 11:39 AM  
Focusing Screen Brightness
Posted By slow2focus
Replies: 37
Views: 8,979
Is this pic showing it is OOF? I have the k3 screen from focusingscreen, after using both shims from them for the total of .29mm, I am about right to slightly back focus. With the copper shim from stock, it is .35mm, I am front focus. I don't know of any material that will give me ~.32 or so... I am asking because you mentioned fine tuning, just wondering what other material can be used to do the tune. Also, how do you do adjust via the macro scale?

Thanks
Forum: Pentax Camera and Field Accessories 01-30-2010, 11:39 AM  
focus screen adjustment opinion sought
Posted By slow2focus
Replies: 1
Views: 1,484
Hi all,

I recently replied my own thread regarding my search for a split screen for my k-x. I ended up ordering the k3 screen from taiwan.

I install and uninstall with combination of 3 shims (2 from taiwan 1 from original). I found it is best with 2 from taiwan. The focus is still "slightly" off I want to emphasize the slight part...

both plastic shims is .14 + .15 = .29mm

the thinest item I have is posted notes which is .1mm

This slight offness is with the 55mm 1.8 ( the fastest lens I have). I have tried the screen with wider lenses but they are all slower than the 1.8 (2.8 and 3.5).

I find that I still have trouble focusing with the wider lenses especially in low light. Moreover, there seems to be subtle differences in what are considered focus amongst lenses i.e., the split don't always line up dead center and the hex light don't always light neither.

How do you guys deal with this? I have done so many install uninstalls now, that a couple more times don't bother me anymore especially it will make it dead accurate. But, given the flimsiness of the paper shim, it may be more trouble than worth.

Thanks
Forum: Pentax Camera and Field Accessories 01-26-2010, 09:07 PM  
yet another focus screen question
Posted By slow2focus
Replies: 8
Views: 2,126
Got my k3 screen from taiwan. I chose the k3 since they don't have any canon screen in stock. I went all out and got the grid line version.

ordered on 14th, shipped on 19th, got it today 26th.

The screen manufacture isn't the best as I had hoped. It already has marks and smudges before it is even out of the package.

Package came with 2 shims

dimentions:

pentax k-x screen 1.35 mm
pentax copper shim 0.35mm
plastic shim in package(1) 0.14mm
plastic shim in package(2) 0.15mm
the k3 screen 1.56mm

The trouble shoot instruction from taiwan is backwards for k3 I think. I installed with tab away from grip just like the factory screen. With factory shim, I get "front focus" according to the web site. I proceed to remove the shim, I get even more "front focus"... long story short, I must have installed and uninstall to play with shims 10+ times.

I am settling with both taiwan shim and screen so it is a complete swap. I am too tired to deal with the 2 largish dust pieces right now since it will require take it apart and clean screen and reinstall.

The focus is much easier now for me though I did start to get good with stock screen. It is dimmer than stock for sure. With good light (next to a lamp at night) I can still focus up to about f8. I can focus more reliabliy in low light with split screen. In dark dark situations, I still can't do much since the screen is just too dim.

center weight metering remains pretty much the same as stock. I never used spot so I can't comment. I am hoping matrix will be ok too.
Forum: Pentax Camera and Field Accessories 01-20-2010, 07:57 AM  
Katzeye or K3 ???
Posted By slow2focus
Replies: 8
Views: 2,772
Hi,

Are you saying that you have a k3 screen, you are experiencing darkening when stop down to f6-8 so you are unable to focus? are you also experiencing metering with the k3?

thanks
Forum: Troubleshooting and Beginner Help 01-19-2010, 11:43 AM  
EV meter on manual lenses
Posted By slow2focus
Replies: 17
Views: 2,894
first, k-x does not have DOF preview on the on-off like other more $$ pentax.
2nd, there are M42 manuals then there are M manuals. The camera behaves differently depending on which. Since you didn't specify, I do both:

For both, in M mode on camera:

M42: (with adapter) full manual no stop down. you f stop on the lens you focus on the lens. Do not assign green button to do anything on the k-x. You meter with M42 by exp comp button OR green button. Both does the exact same thing. If you assign green button to other functions, just use the exp comp to meter. This will place you in the ball park, take a shot, check histogram, repeat.

M manual: manual focus, auto stop down. Do not assign anything to green button. You meter just like M42 with either exp comp OR green button. The k-x will stop down for you to take meter reading while you can focus wide open (assuming option 24 in custom is allowed).

for both, once meter is taken, your Tv will be set automatically. that will be your base starting point.

For both types, I said not to assign anything to green button because should you decide to goto P mode with an auto lens like FA/DA, with green button assigned, it kills the rear dial. You can't change the "combo" Av/Tv. Stupid I know.

I do not have good luck with Av mode with either M type lens, I will let others fill you in on that.

I own the k-x. These are the steps on the k-x.
Forum: Pentax Camera and Field Accessories 01-15-2010, 12:24 PM  
yet another focus screen question
Posted By slow2focus
Replies: 8
Views: 2,126
Thanks everyone for your input. I have decided to go with the screen from taiwan. They only have the k3 one instock so that's the one I got. I went for the one with grids too. overall, just shy of 100. it is 23% of the cost of the k-x. I hope it is worth the cost.

My manual glass is all 2.8 and faster (all used m42 mount). I hope this is good enough to do indoor stuff. I now need to find threads on adjusting focus.

thanks!
Forum: Troubleshooting and Beginner Help 01-15-2010, 09:44 AM  
Focus Confirmation??
Posted By slow2focus
Replies: 14
Views: 3,482
don't have a k7 but have a k-x. on the k-x, the green hex will come on once it thinks you are in focus. But, since manual focus for me takes a while, it the VF display times out. the hex will NOT come on. you need to tap the shutter to activate VF display, achieve focus before the VF display times out. give that a try.
Forum: Pentax Camera and Field Accessories 01-13-2010, 03:53 PM  
yet another focus screen question
Posted By slow2focus
Replies: 8
Views: 2,126
Thanks. I appreciate your thread on the focus screen comparsions. I was suprised that your ebay screen has that weird black line through the split screen if it is indeed an original k1000 screen cut down.

Do you know if the screen from taiwan come with shims? If not, how do I make my own? I am leaning towards that since it is middle of the road in terms of $$ cost.

Thanks
Forum: Pentax Camera and Field Accessories 01-13-2010, 09:03 AM  
yet another focus screen question
Posted By slow2focus
Replies: 8
Views: 2,126
Hi,

I read through all the focus screen threads I can find. The public seems to point to that the ebay screen (jinfinance) darkens post f4...etc there are exceptions for some that don't experience this effect. I did some searching and find that jinfinance claims that their screen is a cut down k1000 screen. the k1000 seems to be a well loved camera here. Can someone confirm this?

I am about the plunk down on a screen from taiwan, but, why spend more if the k1000 screen would do for k-x.

I have yet to find comparisons between jinfinace/taiwan/katzeye with optibright comparison. I know it is an expensive endeavor for one person to own all 3 kinds. But, it is hard to decide with out more info.

thanks
Forum: Pentax DSLR Discussion 01-10-2010, 08:30 AM  
K2000 w/ 2 lens kit or KX
Posted By slow2focus
Replies: 36
Views: 6,185
It does. That is how I "cheat" since I have no idea when to set what being from the P&S world.

All my manual lenses are M42 ones with zero contacts. They all work the same with the green button (exp comp does the same thing btw) sets the exposure when pressed. So, you focus wide open, step down to the F number you want to shoot at, press green button take a shot. check histogram adjust shutter speed by your taste. repeat.

The green button as marc has explained, in k-x, will take on other functions if you assign them. but, you loos the "greeness". But, like I said before, in M mode, exp comp serves the same function. So, you can (and I do) set the green button to do something else and retain setting of shutter speed based on current condition with a button press in M mode.
Forum: Pentax DSLR Discussion 01-10-2010, 08:22 AM  
1 month of experience with Pentax K-x white
Posted By slow2focus
Replies: 114
Views: 43,394
My experience with M42 lenses are different than everyone I read here. With everything properly set up, in Av mode, the meter will consistently change and the F number will display ---. I get wild exposures (I can't compensate for) from shot to shot. They are always underexposed but not by the same amount meaning, same subject/framing I get say -2 stops. Same light different subject or framing, I get say -1 stop or -1.5 stops. I can not just do a general comp for the lens currently on. So, I can't shoot Av mode at all with M42 on my k-x. I end up shooting M with either comp button or green button (they do the same thing) to set exposure. The buttons will get me in the ball park still almost always under exposed, but, much closer according to histogram.

I only M lens I have has a small fungus so I am afraid to attach to the k-x for fear of spreading. I don't have experience with M lenses.


thanks
Forum: Pentax SLR Lens Discussion 01-09-2010, 09:00 PM  
The "GREAT under 50.00 lens" thread
Posted By slow2focus
Replies: 63
Views: 10,174
Hey If you don't mind, how did you get rid of the fungus problem? I have a 50mm M I am contemplating the fix.

Thanks
Forum: Pentax DSLR Discussion 01-09-2010, 08:43 PM  
1 month of experience with Pentax K-x white
Posted By slow2focus
Replies: 114
Views: 43,394
the green button just like all other pentax.
Forum: Pentax DSLR Discussion 01-09-2010, 08:36 PM  
K2000 w/ 2 lens kit or KX
Posted By slow2focus
Replies: 36
Views: 6,185
No, K-X has the green button next to the exp comp button on top right behind the shutter. if you get on dpreview i am sure they would have a picture of the k-x in the recent review of the camera
Forum: Pentax DSLR Discussion 01-09-2010, 07:59 PM  
Kx interchangeable focusing screen?
Posted By slow2focus
Replies: 17
Views: 9,608
Hi,

I am interested in that same screen. Does it come with all the shims and what not or does it just come with the screen with no shim? If so, where do you get shims to try out with?

thanks
Forum: Pentax DSLR Discussion 01-08-2010, 07:47 AM  
focus screen and fungus question
Posted By slow2focus
Replies: 4
Views: 3,496
Thanks for the replies.

RE focus screen: I don't have much experience with film cameras I can see the draw of wanting full frame if anything to just get that "HUGE" view finder. If ME VF isn't even _that good_, I would love to see one that is considered good. The ME VF is I would say 30-40% better than the k-x. I am not sure how much of that is the prism vs mirror vs the screen, but, boy, the k-x is down right puny in comparsion.

I think I may order a k-3 screen from focusingscreen but, they don't list any product for the k-x.

I also can't find katzeye brightness comparision vs say the focusingscreen ones so it is hard to justify ~30% cost of the camera just for the screen. Then of course there is possible metering isssues that has no concrete conclusion.

RE:lens cleaning: Thanks for prviding the thread. It is a good read. The fungus is on a small corner of the lens. I am sure majority of you would just forgo the cleaning. I may do the same. But the fear of it spreading to my other lenses will basically make me not use it.

regardless, thanks for the feedback
Forum: Pentax DSLR Discussion 01-07-2010, 08:00 PM  
focus screen and fungus question
Posted By slow2focus
Replies: 4
Views: 3,496
Hi,

In my search of a "nifty fifty" to try out, I found a "cheap" pentax M 1.4 attached to a pentax ME body. I just received the set.

Unfortunately, the lens has fungus at the very corner but otherwise in excellent shape.
I have read that fungus can spread if left untreated and it will infect other lenses.

I figure if I can clean it my self, and somehow take the focus screen out and grind it down to fit my k-x, it would be cool. Otherwise, I would have to pursue returning the set.

Do you guys think it is worth while to clean the lens and do the focus screen?

If so, is the ME screen the right thickness?
What is the size of the k-x screen dimension?

How does one clean the fungus?

I have lens cleaning solution. I imagine I would need to get another cloth so I don't contaminate?

Thanks
Forum: Troubleshooting and Beginner Help 01-07-2010, 11:41 AM  
Which Flash?
Posted By slow2focus
Replies: 24
Views: 11,145
If you own the flash, you should just spend a couple of bucks on a DVM and measure it your self. a cheapy meter from the shack will get you in the ball park. red on center pin and blk on the side of the shoe. After the flash charges, fire off a test flash then wait till the 2nd charge measure when the flash is ready. anything under 6V is safe. above 6 but below 24, your call. above 24, I won't try it.
Forum: Digital Processing, Software, and Printing 01-06-2010, 12:55 PM  
lightroom beta 3 exif question
Posted By slow2focus
Replies: 3
Views: 2,337
I am not sure if I described correctly. Yes, I am able to see the image I clicked on 1:1 on the 2nd screen. But, it is very blurry. As time progresses, it becomes clearer and clearer then all the sudden perfect sharp (assuming the pic is focused correctly to begin with that is) then a split second later, slight blur then the "loading" goes away like it is done but the slight bur stays like this is LR's final rendering of the image I clicked.

I am not familar with LR other than adjusting WB and exposure comp. Nothing else is familar. I just want that perfect sharp moment as my final image as oppose to slight blur as the final image.

I shoot dng raw because I know I F'up on the regular. The camera pic setting hovers between neutral to bright depending on what my thumb is doing when I am changing setting for SR and sometimes, it is on pic mode not on SR when I turn thumb dial.

Thanks
Forum: Digital Processing, Software, and Printing 01-06-2010, 09:20 AM  
lightroom beta 3 exif question
Posted By slow2focus
Replies: 3
Views: 2,337
Hi,

I downloaded LR3 beta and has been playing with it comparing to picasa. Since LR was able to render the k-x raw with out the black line on the side, it is already a plus for me. I have a question regarding editing exif within LR during import or even during library/edit views. I have been shooting manual lenses for a bit. It does not record F number. If I remember the shots, I would like to update the aperture while I am in LR. I have yet to find a way to do that please let me know.

In loop mode, I run dual monitors so I run the 2nd display as loop 1:1 sometimes. When I click on a new image, the screen says 'loading'... for a long time. annoying but, I am ok with it so far, what is interesting is that, it will display the image all blurred, all the sudden it will come to perfect focus... I mean perfect sharp. As soon as the 'loading' disappears, the image at 1:1 will go slightly blur. I can't get that sharp image I saw to come back. Anyone experience the same?

thanks
Forum: Pentax Camera and Field Accessories 01-05-2010, 08:11 PM  
sunpak pt-2d module
Posted By slow2focus
Replies: 1
Views: 2,651
Hi all,

I just want to rely my experience with my sunpak "system" LOL. I took the advice of a member here soldbear to get a flash on the cheap for my new k-x. I got a sunpak 36DX auto flash with a ricoh module since it was the cheapest of the modules listed. The flash is running at 11.02v trigger with the ricoh shoe module consistently. I hunt around and was able to find a deal on a sunpak 555 flash. I was also able to get the pt-2d module cheaper than the pt-1d. With the pt-1d on the 36dx, the trigger is at 4.31v consistently.

The ricoh/36DX combo worked fine with my k-x prior acquiring my 555 + pt-2d. The 36dx combo + pt-2d also works with out flaw. The big difference is that, with pt-2d which is pentax specific, in M mode, while the flash is charging, if you have already setup to meter with the flash, the lcd screen will blink. Once the flash charges, it will stay solid. It will not alter your shutter in anyway but, will allow you to adjust the shutter up to the max sync of 180 and no more just like the built in flash if you pop it up. With the ricoh module, you can't get to the 180 shutter since it will hump from 160 -> 200. So, your max sync is 160. Also, lcd screen will blink regardless the charge state of the flash.

I got 555 mostly for goofing. I was able to find the sunpak optical slave cheap so, I have that hooked up to 555 as a slave. The 36dx is on the hotshoe. I also have a std module in case I want the 36DX off camera on optical slave. I don't think I ever want to carry the 555 around as main flash since it is huge and heavy. But it is powerful to act as fill on a tripod stand with bouncing and whatnot.

The few pics I took to make sure parts are working turn out OK. No shadows or anything. I need to build some sort of diffuser for both to soften the bounce even more I think.

So, in conclusion, it is pretty nice that the pentax specific module will work to some degree with the k-x and allows max sync speed. It is also a pleasent surprise that the trigger is down to < 6V which seems to be universally agreed to be 100% safe. The ricoh though functioning as designed, has the side effect of slightly higher 11v trigger that some may not find acceptable. I am OK with 11v I think. Prior to the new module, I took about 100+ expsure with the ricoh module, knock on wood, the camera/hot shoe is still functioning.

the 555 btw, has the default trigger of 5.4v and with the ricoh module, it is 2.6 - 2.7v
Forum: Pentax DSLR Discussion 01-02-2010, 09:03 PM  
Something wrong with K20D sensor!!
Posted By slow2focus
Replies: 20
Views: 5,039
Sorry foot in mouth time. I should read and re read the post before reply. Didn't mean to insult you photo taking skills.
Forum: Pentax DSLR Discussion 01-02-2010, 08:06 AM  
Something wrong with K20D sensor!!
Posted By slow2focus
Replies: 20
Views: 5,039
far for me to critique other people's photo. But, all sensors will have trouble with snow. It will under expose by as much as 2+ stops. This seems like the case. Unless my monitor isn't set up right :)

I am sure other people will ask... please post EXIF. To take snow pics, you need to do exp comp to about +2 to start with and go from there. With the fancy K20d, you can shoot bracket and pick the best.
Forum: Pentax DSLR Discussion 01-01-2010, 09:23 AM  
K-X: Lack of Autometer Indicator an Issue?
Posted By slow2focus
Replies: 16
Views: 4,382
actually, that is not really the case. you can select the point you want on the lcd. but, when in 5pt or 11 pt mode, the lcd does not display which point(s) are select like other with indicators built in the VF. I think it is more acceptable if they want to remove the AF in VF, they should at least reflect in lcd which of the 5 pt or 11 pt were chosen.

There are many arguments on whether AF indicator is useful or not and work around and get use to it and what not.

But, why include the auto modes but not tell you which just to add confusion or fuzzy shots from a _beginner_ level camera?

Also, playing with manual lenses sort of teaching me to do the focus recompose. But, that is just old school. Back when that is the only way to do things. We have the technology to do oober points, it is time that we start to embrace and use it.
Forum: Pentax DSLR Discussion 01-01-2010, 09:13 AM  
K-x over D5000. Am I wrong?
Posted By slow2focus
Replies: 102
Views: 31,091
I have to agree too. Coming from a borrowed D40, the next logical step was the d5k. The only reason for the k-x was price and the fact that manual takumars are really nice. Had I gone with the d5k, I would have just gotten the new VR tamron to replace the kit and perhaps a flash and be very happy. Much cheaper too as I am finding out LOL.

It is my belief that majority of the the target for these 2 models don't 'geek out' surf the forums and run comparisons. I am not familiar with the whole AF lens line of the pentax. But, from general day-to-day use, both companies provide similar lines of lenses that will AF and VRed. If the complaint is D5k don't have a screw drive, well, you can always manual focus just like the M/A/Tak/M42 of the pentax since D5k boasts the largest mount compatibility that nikon makes (from bythom).

I am just saying, from a purely AF point of view, D5k supports a variety of nice lens too. The nikon lenses don't suffer from the motor failure neither. the focus speed only improves as you buy better and better pro grade lenses. I have done this with the pro 24-70 from nikon($1500) and this is on a puny D40!!

If one don't care for old lenses that requires manual focus, I thnk D5k has advantage.

That said, I still chose the k-x. Last I checked, both cameras in capable hands take very very nice pictures.
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