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01-11-2016, 01:17 PM   #1
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Request for Info - 645 and 67 Rear Lens Cap Diameters

Hello. Can someone(s) please provide the diameters, both outside and inside (ignoring the mounting flanges), for both Pentax 645 and Pentax 67 rear lens caps. [As is obvious from my question, I don't have any such lenses or caps.] Thanks very muchly.

01-11-2016, 01:39 PM   #2
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QuoteOriginally posted by fwcetus Quote
Hello. Can someone(s) please provide the diameters, both outside and inside (ignoring the mounting flanges), for both Pentax 645 and Pentax 67 rear lens caps. [As is obvious from my question, I don't have any such lenses or caps.] Thanks very muchly.
The rear lens cap on my 645 (manual focus) lenses measure 66mm inside (ignoring flanges) and 71mm outside. Sorry, I don't have a 67 rear lens caps. I don't have a good measuring caliper, just a cheap ruler, so if anyone can verify this?
01-11-2016, 02:04 PM   #3
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QuoteOriginally posted by Alex645 Quote
The rear lens cap on my 645 (manual focus) lenses measure 66mm inside (ignoring flanges) and 71mm outside. Sorry, I don't have a 67 rear lens caps. I don't have a good measuring caliper, just a cheap ruler, so if anyone can verify this?
Thanks for the 645 info, Alex. [And I don't need caliper accuracy -- millimeter ruler accuracy is fine, which I should have noted in my original post.]

Last edited by fwcetus; 01-11-2016 at 03:06 PM.
01-12-2016, 04:22 AM   #4
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For 67: measured outer dimensions 81mm and inner 76mm. Inner at mounting flanges at 74,5mm. Hope this is accurate enough!

01-12-2016, 06:18 AM   #5
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QuoteOriginally posted by ppohja Quote
For 67: measured outer dimensions 81mm and inner 76mm. Inner at mounting flanges at 74,5mm. Hope this is accurate enough!
I am sure that it is, ppohja -- thank you very much.
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