[fwcetus]

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.

[Alex645]

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?

[fwcetus]

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.]

[ppohja]

For 67: measured outer dimensions 81mm and inner 76mm. Inner at mounting flanges at 74,5mm. Hope this is accurate enough!

[fwcetus]

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.