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Pentax Lens Disassembly Database


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Pentax Lens Disassembly Database
Posted By: Chaos_Realm, 03-22-2012, 05:04 PM
Hi all,
I have recently been on the hunt for dis-assembly guides for the purpose of dust removal etc. They seem to be turning up in various places across the forum, so I plan on creating a list of all the Pentax lens disassembly posts here. I will categorise each lens like they are in the 'lens database' and you should be able to see which lenses have a guide and which do not. If I come across multiple guides then I will list them all under that lens so there is coverage or alternative explanations. And hopefully with your help we will be able to put together a substantial resource for the DIYer's here, although I do realize some lenses will never have an owner brave enough to strip down themselves due to the shear value. I know this will take quite some time but I think it will be worth it. I have restricted time at this point but I want to get the ball rolling. So here is what we have:

NB: Currently this tread is only for Pentax K-Mount & M42 Screw-mount lenses. Maybe once this has developed a bit I might look at introducing other pentax Mounts and or third party lenses and permitting time (and success of this resource) a cleaning guide with tips on tools and techniques. I am trying not to bite off more than I can chew for the moment so we will just stick with lenses listed below.

Digital Era K-mount Lenses Film Era K-Mount Lenses
M42 Screw Mount Lenses

Last edited by Not a Number; 04-13-2023 at 09:03 PM. Reason: added takumar-bayonet-28mm-f2-8 partial disassembly
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04-22-2017, 09:12 AM - 3 Likes   #121
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Repair of jammed zoom SMC DA 16-50 F2.8 ED AL [IF] SDM
Hello fixed my 16-50 with zoom problems
here is a pdf with instuctions

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File Type: pdf ◦SMC DA 16-50 F2.8 ED AL [IF] SDM.pdf (2.13 MB, 1662 views)
04-22-2017, 07:28 PM   #122
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QuoteOriginally posted by niceshot Quote
FOUND THIS Lens disassembled and with a problem: SMC Pentax-DA L 50-200mm F4-5.6 ED WR - YouTube
QuoteOriginally posted by kh1234567890 Quote
Disassemble front element of zoom lens SMC DA 50-200mm WR - PentaxForums.com
QuoteOriginally posted by pemany Quote
Hello fixed my 16-50 with zoom problems
here is a pdf with instuctions
Added All of these - Thanks
05-25-2017, 09:11 AM   #123
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lens disassembly
this site/blog has a lot of disassembly data

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05-25-2017, 10:09 AM - 1 Like   #124
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QuoteOriginally posted by uttam.hathi Quote
this site/blog has a lot of disassembly data

PenPen
it is good if I read Japanese.
05-26-2017, 09:59 AM   #125
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thought pictures spoke with thousand words
05-26-2017, 08:23 PM   #126
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QuoteOriginally posted by uttam.hathi Quote
thought pictures spoke with thousand words
You are right they do, thx
05-29-2017, 08:11 AM   #127
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Guide to Rebuild Auto-Takumar 35mm 2.3
Here is a guide to rebuild this Lens as I could find none on the internet, Do it at your own RISK. Also this is not for beginners,as this Lens deserves RESPECT.

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File Type: pdf Rebuilding Auto Takumar 35mm2.3 - intructions.pdf (54.0 KB, 130 views)
Last edited by niceshot; 05-30-2017 at 03:37 PM.
06-15-2017, 08:32 AM   #128
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Is there a guide to taking the DA 18-135 lens apart? Mine has a black spot on one of the inner lens elements. It seems too dark to be fungus but I have no idea what it might be.

Are the instructions for taking apart the other DA lenses generic enough to be applied to all of them or do I really need specific instructions for the DA 18-135 lens?
Last edited by Theov39; 06-15-2017 at 10:17 PM.
06-15-2017, 10:17 PM   #129
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QuoteOriginally posted by dcshooter Quote
How far in is it? If close to the front or rear, it should be fairly easy, but if it's one of the inner groups, it will require a ton of disassembly. Probably just a bit of black paint or flocking, so likely not even worth attempting to clean anyway.
Thanks for that. Very helpful. I hadn't thought about that. I took a shot of a white wall and it doesn't in anyway affect the image so maybe not even worrying about. I can't tell exactly where it is but it appears to be on the bottom side of the first top element at the filter ring end.[COLOR="Silver"]
Last edited by Theov39; 06-15-2017 at 10:45 PM.
06-16-2017, 01:39 PM - 1 Like   #130
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QuoteOriginally posted by Theov39 Quote
Thanks for that. Very helpful. I hadn't thought about that. I took a shot of a white wall and it doesn't in anyway affect the image so maybe not even worrying about. I can't tell exactly where it is but it appears to be on the bottom side of the first top element at the filter ring end.[COLOR="Silver"]
I have a chip in one element towards the outside in a central element, and it does not impact the image quality what so ever. I doubt your does either. But I understand wanting a perfect Lens.
06-21-2017, 02:48 AM   #131
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Wanted to note that the regreasing the Super Takumar 35mm f3.5 is pretty much the same as this, a little different at the front filter ring. Not much. Super Takumar 55/2 disassembly - PentaxForums.com
06-21-2017, 02:29 PM   #132
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QuoteOriginally posted by Ranchu Quote
Wanted to note that the regreasing the Super Takumar 35mm f3.5 is pretty much the same as this, a little different at the front filter ring. Not much. Super Takumar 55/2 disassembly - PentaxForums.com
And the Auto Takumar 35mm is a completely different animal, look up my rebuilt instructions.
07-03-2017, 08:25 AM   #133
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Has anybody disassembled an A 50/1.2 lens?
07-03-2017, 08:56 AM   #134
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QuoteOriginally posted by timw4mail Quote
Has anybody disassembled an A 50/1.2 lens?
Why is it that you need to?
07-03-2017, 08:57 AM   #135
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QuoteOriginally posted by niceshot Quote
Why is it that you need to?
Fungus spot on rear group. Well, I'll probably just deal with it, but if it were simple to fix, I'd give it a shot.
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