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Forum: Troubleshooting and Beginner Help 08-11-2012, 03:26 PM  
Pentax K-5 shutter keeps clicking
Posted By bobhoskin
Replies: 10
Views: 1,914
I've the k-r, and for other reason I've opened it up to the mirror mechanism, and I can say what the problem could be... I found the last gear (gear n7 from motor, the one with sliding contacts on it) with 2 problems:
one)) the grease with time and use moved from the center shaft all around on the contact flex board, causing bad contact and help making resistence, so the camera loose signal and maybe can turn around and around............
two)) the gear has two cams under it, that needs to flip up the mirror and to charge the shutter, the first cam was consumed by use, because not thick enough (it's plastic) to push that spring 1000000000 times :D

I don't know if the K5 it's the same, I think this can really be one of the "mirror flop" reasons.
The reason about disassemble my entire k-r is here: https://www.pentaxforums.com/forums/general-technical-troubleshooting/195494-...y-problem.html

:)
Forum: Troubleshooting and Beginner Help 03-04-2012, 09:24 PM  
Repair Pentax 540
Posted By ustinof
Replies: 6
Views: 2,813
Thanks the colleagues, all previous authors on repair Pentax 540.

Problem essence: at first zoom worked only to 24 mm, and after a small push sideways heads of flash and in general has ceased zoom reflector.

We begin dismantling.
On a flash head from below there are 2 small screws - is turned off them.
We remove rubber overlays on one side flashes - under them on 4 screw from each party.
We turn off the top part (on two screw from each party).
We lift the top part of a head. Be careful and don't tear a wire. Disconnect it.

-----------------------
ATTENTION!!! THE HIGH VOLTAGE!!

At first we measure by the device (the voltmeter or a multimeter) pressure in points:

Now it is necessary to discharge the condenser. It is for this purpose necessary or the resistor 1 kiloohm of 2 watts
Or it is possible to use an ordinary lamp of an incandescence of 220 volt 50-100 watt
We discharge in these parts:
-----------------------
We check the device (the voltmeter or a multimeter) pressure. It should be 1-2 volts.
After that we unscrew remained 4 screws and it is assorted the bottom part of a head.

The problem has dared so: the bottom payment on which go 4 contacts a spring, has moved from blow. Has been put into place. The payment can be fixed glue or a sticky tape.

If that isn't clear - write...
Forum: Pentax SLR Lens Discussion 02-26-2012, 01:21 AM  
Super Takumar lens hood
Posted By Bruce
Replies: 7
Views: 3,526
And if you want a bayonet one look at the Matin brand ones on ebay.
Forum: Pentax DSLR Discussion 07-06-2011, 03:56 AM  
How to replace IR-block filter on *ist D
Posted By karma mechanic
Replies: 14
Views: 4,471
I started following Enzo's instructions, but it soon became evident that the 'D' and the 'DS' are very different. For the DL I found that the internals are pretty much the same as the DS, so I referred to this site to get more info. The main board has some slightly different connectors on mine but nothing too confusing.

Since I'm a cheapskate I cut an old Hoya 58mm R72 filter in half and fashioned the required 28x22mm filter out of one half. I wrapped the glass in vinyl tape except where I was using the glass cutter, then used pliers to snap it - luckily it divided cleanly.

The proper way to correct the focus is to shim the sensor so it moves towards the lens, but since at the time I didn't know how much to move it I left that so I could calibrate the focus after reassembly. Enzo's pages do cover that part, so in my case 0.5mm would have been correct. As it was I simply adjusted the AF via the debug menu. This means that the viewfinder image is slightly out when the sensor is correctly focussed, but that's not a serious handicap. You'd almost certainly need to adjust the AF a little in any case.

A warning - be very careful with the left side of the body when disassembled, there are high voltages on the flash circuitry which could hurt you or the camera. It is best to discharge these via a resistor before handling the body. You can get the service manuals for older bodies via the Pentax Hack site with good instructions on that step.

Be careful with the ribbon cables. Place the screws in containers and make notes about where they come from, there are around 26 screws of differing sizes to get as far as the sensor block. In order to separate the boards there are several tiny cables that need to be desoldered so make sure you know what goes where.

If you are not familiar with taking stuff like this apart you may well ruin it or hurt yourself so please be careful - or use a commercial service.
Forum: Pentax DSLR Discussion 02-10-2009, 12:33 AM  
How to replace IR-block filter on *ist D
Posted By vincenzomiceli
Replies: 14
Views: 4,471
Folks,


I replaced the IR block filter of my *ist D to expand its spectral response to the far red and H-alpha line. This is very useful for astrophoto of emission nebulas.

I compiled all the info on the follwing web-page. Have a look if you are interested.

Pentax *ist D IR Mod ?(Enzo's Home?)

Ciao,

Vincenzo
Forum: Pentax K-r 06-23-2011, 11:54 AM  
K-r uses too slow shutter times with external flash
Posted By keithlm
Replies: 19
Views: 6,856
I respect that you have stated your opinion and you have the right to have that opinion. However, just because it is your opinion does not make it automatically correct. (Regardless of how many times it is repeated in every thread about the subject.)

The fact remains that a DSLR that sets too low of a shutter speed on a regular basis with a flash has a bug or was poorly designed. That is my opinion and I have a right to that opinion. If you want to call me a names then be my guest. It won't remove the fact that the K-R often selects too slow of a shutter speed.

Here is an easier concept: if multiple people perceive something as a problem then regardless of the opinion of other people the fact remains that there is a problem. Calling them noobs and repeatedly telling them they are using their camera wrong is not an intelligent argument.

You'll also notice that the old SLR used 1/60 (and even later automatic SLR) didn't "intelligently" decide to lower the speed down to a slower shutter like 1/8 or 1/4 because that would not be very intelligent. Just like it isn't a good idea on a DSLR when a flash is used.

Hopefully they will fix this bug with a firmware update.
Forum: Pentax SLR Lens Discussion 05-30-2011, 06:37 AM  
Is this chips fixable??
Posted By Schraubstock
Replies: 14
Views: 1,874
Sorry I disagree.
Don't use black paint, if the spot shows up it will be more noticeable than the clear nail polish I suggested. I spent a lot of time experimenting at the time.

I put some water on the damage to make the white glass dust more transparent and stuck next to it a black paper patch of the same size (Because I had the same idea about the black and I wanted to find out before committing myself.) I than took a series of shots under a lot of different light conditions and angles. I can tell you that the water worked best, and when I put the clear nail polish on it was even better still.

Greetings
Forum: Pentax SLR Lens Discussion 01-29-2011, 05:36 PM  
My Poor smc Pentax-M 50mm f1.7 (Aperture Blade Problem...)
Posted By Just1MoreDave
Replies: 7
Views: 5,883
Practical advice:
I doubt it would have any noticeable affect on photos. If the blades still are snappy, it's not worth worrying about. I guess if it was a new lens, I'd consider exchange or warranty repair just so that I don't feel dumb if something serious happens 1 day out of warranty.

What I'd do anyway
I have one of these that I couldn't sell for my price because of a small scratch, so I kept it. I can take it apart in about a minute. So I would just do that to see what's up. The aperture is always inconveniently located in the middle of everything so it's a lot of disassembly. But this particular lens makes it easier than most.

Use a friction tool to unscrew the "name" ring via the filter threads. It can be anything from a real tool fo a rubber crutch tip, as long as it gets a good grip on the ring and doesn't touch the front element. Dents in the filter ring or dirt in the threads make this difficult; fix those first. When the ring is off, you'll see this (almost):



You can remove the filter ring by removing the three screws marked with red arrows above. It may not be 100% necessary for this operation, but it shouldn't be tough either. That makes your lens look like this:



You now need a lens spanner or improvised tool, like needlenose pliers with tips ground down to fit the square slots. The ones you want are marked with green arrows in the above photo. They allow you to unscrew the front group of lenses in one unit, and place that aside. Don't do anything with the screws marked with red arrows in that photo. The screws you want to remove are marked here with red arrows:



Remove the screws. Now you can lift out a center tube that contains the aperture and rear lens group. It looks like this:



The arrow points to a rod that moves the blades. The rest of the lens has a little fork that the rod goes into. You'll need to do that when reassembling:



You can set aside the rest of the lens. I would also unscrew the rear lens group from the tube so it's out of your way. At this stage you can grip it by hand and not need tools, or use the outer spanner slots.

Now you're on your own. :) I haven't taken mine apart any further than this. I think the construction is similar to this Takumar 55mm f2:



Both lenses have screws around the outside of the tube. They hold some part of the aperture mechanism together. On the 55, it's a plate that keeps the blades from falling out. You'll probably have to see for yourself.

Though that's what I'd do, and it doesn't seem like a big deal to me, it may not be for everyone.
Forum: Pentax K-r 01-23-2011, 02:18 AM  
Battery Adapter in stock at amazon
Posted By hawk1500
Replies: 30
Views: 8,426
yeah, well, I was going to put them on ebay and maybe try and sell them for like $8-10 shipped on here to help out fellow members. But yeah, will update when (if) I actually get them.
Forum: Pentax K-r 01-20-2011, 10:06 AM  
Pentax K-r firmware update 1.01
Posted By manninej
Replies: 139
Views: 50,267
Thought of checking it out and as we can see the K-r packet has also changed.

8d39af36261600867a8e306e069b6818 kr_e101m.zip
98e5aa23181c0a3c78a4de23faabe983 kr_e101m(2).zip

Internal version 1.01.20.8 -> 1.01.20.9.

Haven't noticed any difference yet, after updating.
Forum: Pentax DSLR Discussion 01-20-2011, 02:31 AM  
K200d tethered to laptop?
Posted By bobD
Replies: 10
Views: 4,507
Forum: Troubleshooting and Beginner Help 01-03-2011, 06:11 AM  
blue bands in my IR
Posted By enoeske
Replies: 2
Views: 1,813
Make sure you are blocking the light from entering through the eyepiece. It can cause banding like this.
Forum: Pentax SLR Lens Discussion 12-25-2010, 05:38 AM  
Have you lost your filter door?
Posted By Schraubstock
Replies: 8
Views: 2,181
Here is a modification I made to the lens hood of the Pentax 60-250 so the little filter door cannot be lost. (it is just so small and so easy to lose)

1) Take something sharp and pointy to mark the spot where you will drill (Otherwise when you start to drill the drill bit will wander all over the place and ruin the hood)

2) Take a 1mm drill bit, (not bigger) and drill holes where you have marked. if the drill bit is too small for you drill chuck, wrap a bit of masking tape around it, it will grip the bit enough for this job if you go slowly.

3) Take a length of this woven Nylon cord, (find a little halyard from old something) tie a knot in one end, cut end off and seal with flame so it won't fray.

4) Pull cord through the hole from inside the hood, thread it through the other hole of the door, (5) measure a suitable length and do another knot, cut off past the knot and seal with flame as above.


6) prepare a small amount of 5min. Araldite and dab a small amount on the knot inside the hood. (I said small amount didn't I) Wriggle the cord a little bit to make a small amount of Araldite to come through the hole on the other side. (See picture 7). Now let the door dangle until the Araldite has cured. After this repeat the process with the door and let the hood dangle.

When the Araldite is fully cured you can dab a bit of matte black paint on the little blob of Araldite, and the job is done.
Forum: Pentax K-r 12-22-2010, 11:25 AM  
Chat w/Pentax Regarding K-r Front Focus
Posted By krebsy75
Replies: 2
Views: 3,844
Please wait while we find an agent to assist you...You have been connected to Matthew P.Matthew P: Thank you for contacting Pentax Chat Support. How may I help you?Dennis: Last week I bought a K-r for my wife. We mostly love it but it seems to be front focusing in incandescent light.Matthew P: Ill be with you in a second.Dennis: Ok. I've got a K20d, K10d, and had a K7 for awhile. We noticed the pics on the K-r looked soft so I tested it last night. The most focused image was the one taken with the adjustment at -10Matthew P: Im here.Matthew P: Thank you for your patience.Matthew P: So tell me about your camera, please.Dennis: I did...Matthew P: I read that.Matthew P: So how long have you had this Kr?Matthew P: one week?Dennis: Almost a week.Matthew P: Well, if your camera is not working correctly then I suggest sending it back to the retailer for an exchange.Dennis: Is this a known issue for the K-r?Matthew P: No. We do not have this as a known issue....Is this with one lens or all your lenses?Dennis: The test was with one lens. But the softness appears with other lenses as well. I intend to test all of my lenses in different types of light.Matthew P: Yes, please.Matthew P: Just to let you know. If you want to send in one lens with your Kr, the repair facility can actually adjust this lens to work properly with your camera. And this would also fix the problems you're having with your other Pentax lenses.Matthew P: So, you can either send this in or you can exchange it.Dennis: We might do that. I want to test all of my lenses first. I did have CRIS repair and calib. one lens. Of course, I'm aware that they calibrated the lens to their gear and not ours.Matthew P: Alrighty. Well, the choice is yours.Matthew P: Just let me know, and I can send you the info that you need.Dennis: Can you send me information on that? Also, regarding autofocus in incandescent light, is there a best practice to ensure accurate focus?Matthew P: Information from CRIS can be found at criscam.com. Or you can contact them @ 877-269-7179 -dial zero to bypass the automated voice-Matthew P: Or you can check out https://www.criscam.com/retail_faqs.phpDennis: Does Pentax cover the cost for calibration?Matthew P: If you are under the warranty then they will cover the cost. You send it in though.Dennis: okMatthew P: Do you have any other questions for me?Dennis: Not at this time.Matthew P: Alright. Well, thank you for contacting Pentax. Hope you have a good week.Thank you for using InstantService.
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