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04-21-2010, 08:58 AM   #1
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Hot Filter Thickness on K10D?

Does anyone know the thickness of the hotfilter (IR/UV) on the K10D CCD?

I'm curious because I'm considering getting a second body and then supplying my own filter material to an IR conversion shop. That way I can ensure that I'm getting the critical colors I'm seeking.

Since I do astrophotography, I'm wanting to get the 656nm H-alpha line and desire a cutoff at 420nm to prevent violet halos. I'm considering the Baader filter as my material and they provide it in a slab that's 3mm thick.

I'm not sure if this is the correct thickness for the Pentax camera.

Does anyone know?

04-21-2010, 09:08 AM   #2
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There is a K10d Service manual here that may help you.. Perhaps in the parts list (if there is one).. I can't really help you beyond that but I'm anxiously awaiting your photos to see the result.

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04-21-2010, 09:32 AM   #3
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I looked over the service manual and it didn't have dimensions on the filter. I'm working finding more information at the moment, hopefully I'll have something new to report soon.
04-22-2010, 11:43 AM   #4
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QuoteOriginally posted by JeffJS Quote
There is a K10d Service manual here that may help you.. Perhaps in the parts list (if there is one).. I can't really help you beyond that but I'm anxiously awaiting your photos to see the result.

Downloads

Jeff: very interesting link. I am sure not that many people are able to disassemble a K10D and have it put together correctly.

04-22-2010, 06:09 PM   #5
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QuoteOriginally posted by jjdgti Quote
Jeff: very interesting link. I am sure not that many people are able to disassemble a K10D and have it put together correctly.
I'm certain I could Do it, but that doesn't make it a good idea. I was just hoping it would have helped the OP, I would love to see some Astro photos from a modded K10d, at which point I might try it myself.


04-23-2010, 03:39 PM   #6
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I've sent an email to Spencer's camera to see if they could get back with me on the dimensions of the filter. No luck yet. I'll give them a phone call next week.

I'll probably do this project later in the year in August, since I'll be shooting a wedding for a friend and the extra body will come in handy. Once that is done, I'll send that extra body off for the change.
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