I've found there to be a tremendous range in both quality and price of K-mount back caps for lenses. I have not found there to be consistent correlation between quality and price though. Some of them will tighten down nicely and stay attached, others will stay loose and just fall off. Has anybody found good deals on quality K-mount back caps? Larry -- Larry Colen lrc@red4est.com sent from ret13est

 Larry

I've had good luck with caps by OP/TECH USA from Amazon.  Over the years I've used both their singles and doubles.  Never had one come loose or fall off. https://tinyurl.com/5n7y2xhm -p On 6/24/2024 12:15 PM, Larry Colen wrote: > I've found there to be a tremendous range in both quality and price of K-mount back caps for lenses. I have not found there to be consistent correlation between quality and price though. Some of them will tighten down nicely and stay attached, others will stay loose and just fall off. > Has anybody found good deals on quality K-mount back caps? > > Larry > -- > Larry Colen > lrc@red4est.com sent from ret13est > > > > -- > %(real_name)s Pentax-Discuss Mail List > To unsubscribe send an email topdml-leave@pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. >

 Larry

Thanks, do they actually cover/protect the electrical contacts? On June 24, 2024 10:46:21 AM PDT, Paul Sorenson <pentax1941@studio1941.com> wrote: >I've had good luck with caps by OP/TECH USA from Amazon.  Over the years I've used both their singles and doubles.  Never had one come loose or fall off. > >https://tinyurl.com/5n7y2xhm > >-p > >On 6/24/2024 12:15 PM, Larry Colen wrote: >> I've found there to be a tremendous range in both quality and price of K-mount back caps for lenses. I have not found there to be consistent correlation between quality and price though. Some of them will tighten down nicely and stay attached, others will stay loose and just fall off. >> Has anybody found good deals on quality K-mount back caps? >> >> Larry >> -- >> Larry Colen >> lrc@red4est.com sent from ret13est >> >> >> >> -- >> %(real_name)s Pentax-Discuss Mail List >> To unsubscribe send an email topdml-leave@pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. >> >-- >%(real_name)s Pentax-Discuss Mail List >To unsubscribe send an email to pdml-leave@pdml.net >to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. > -- Sent from my Android device with K-9 Mail. Please excuse my brevity.

  Larry

Yes, they extend out to completely cover/protect the contacts.  They also have a rubber O-ring that help with some friction to keep the cap from turning and keeps any dust from getting to be back of the lens. -p On 6/24/2024 12:53 PM, lrc@red4est.com wrote: > Thanks, do they actually cover/protect the electrical contacts? > > On June 24, 2024 10:46:21 AM PDT, Paul Sorenson<pentax1941@studio1941.com> wrote: >> I've had good luck with caps by OP/TECH USA from Amazon.  Over the years I've used both their singles and doubles.  Never had one come loose or fall off. >> >> https://tinyurl.com/5n7y2xhm >> >> -p >> >> On 6/24/2024 12:15 PM, Larry Colen wrote: >>> I've found there to be a tremendous range in both quality and price of K-mount back caps for lenses. I have not found there to be consistent correlation between quality and price though. Some of them will tighten down nicely and stay attached, others will stay loose and just fall off. >>> Has anybody found good deals on quality K-mount back caps? >>> >>> Larry >>> -- >>> Larry Colen >>> lrc@red4est.com sent from ret13est >>> >>> >>> >>> -- >>> %(real_name)s Pentax-Discuss Mail List >>> To unsubscribe send an emailtopdml-leave@pdml.net >>> to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. >>> >> -- >> %(real_name)s Pentax-Discuss Mail List >> To unsubscribe send an email topdml-leave@pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. >>