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08-23-2010, 01:47 PM   #1
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End cap size

I am the proud new owner of a 135mm Pentax prime lens. Only drawback is that is didn't come with a lens cap or end cap. I know I need a 49mm lens cap. Would the end cap be the same size?

08-23-2010, 02:04 PM   #2
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QuoteOriginally posted by subeeds Quote
I am the proud new owner of a 135mm Pentax prime lens. Only drawback is that is didn't come with a lens cap or end cap. I know I need a 49mm lens cap. Would the end cap be the same size?
The mount cap is universal for all K-mount lenses. Unless that lens is a M42 lens you will be fine with any mount cap that is made for Pentax K mount.
08-23-2010, 02:20 PM   #3
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Thanks, KxBlaze. I just wanted to be sure before I got stuck with a bunch of useless stuff.
08-23-2010, 02:48 PM   #4
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Pentax however made two variants in k rear end caps. You will find that the rim around the base of the cap is larger to cover the increasing number of contacts with A, F and so on.
The rear lens cap for K and M had a smaller rim, not much need to cover contacts there. Of course they still fit, but contacts are not fully covered with the older type if you fit it on a A, F, FA lens.

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