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05-17-2012, 06:44 AM   #1
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Extension tubes

I'm sure this subject is like beating a dead horse.

But tubes for Pentax with the electronic connections are hard to find, my question is has anyone heard of or used "Jessop" extension tubes?

Are they any good, are their issues that make them difficult to use etc.?

Thank you in advance for the help.

05-17-2012, 07:51 AM   #2
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I have not used them, but really extension tubes are pretty simple. If they have the contacts passed through they either work or not. That seems to make them a lot more expensive than non-contact tubes of course. I did find this article on them that indicates they do not work quite right unless you scrape off the paint to make a good connection to the camera.

And here is the review on the Pentax Forums site.

Another possibility is to look for cheap 2x teleconverters with contacts and pull the glass out of them.
05-17-2012, 06:16 PM   #3
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Thanks for the info, and artical it was all very helpful!
05-25-2012, 06:58 AM   #4
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Extension tubes

I have a set of the Jessops's tubes that I purchased on E-bay/UK. I also had to clean off some of the coating to get them to work properly, but they do now and they are great. I also have a set of the Kenko Pz-Af Uniplus, and they are the best of all, and I also picked them up on Ebay-UK. Seems to be about the only place I could find them. Now, I cant live without them!

05-26-2012, 12:18 PM   #5
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Have you thought about one of these?
Vivitar 2X Macro Focusing Teleconverter for Pentax Manual K-A Mount w/Contacts | eBay
05-26-2012, 05:11 PM   #6
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QuoteOriginally posted by gp1806 Quote
That's an idea, but you lose 2 stops of light and have added glass in the optics. A real Extension tube is empty. A black tube. Mine is 50 mm long, and has no contacts which doesn't matter to me because I only use them with my two M lenses.
05-29-2012, 10:29 AM   #7
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Check out my two posts in this thread:
https://www.pentaxforums.com/forums/pentax-camera-field-accessories/113756-pk...ion-tubes.html

The first post is a text explanation, the second is show & tell photos.

While I am using an adjustable macro converter in my example rather than extension tubes, the same technique will vastly improve the usability of "dumb" K-mount extension tubes on Pentax dSLR cameras.
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