Rob Katz
January 20th, 2012, 09:20 PM
cowboystudio dumb adapter k mount stuck on a lovely pentax 35-105mm f3.5.
nothing will budge.
no movement at all.
(which is great if the darn thing twisted off!)
i previously had it on a 50mm f1.4 and it twisted off no prob.
i'm sure this has happened to others.
any and all insights would be great.
be well
rob
smalltalk productions
Jim Michael
January 20th, 2012, 10:46 PM
Maybe get some anti-seizing fluid at the auto parts store and let a drop penetrate into the area for a while. Another option might be application of cold, or heat, or differential temperatures (inner thing make colder, outer thing warmer).
Chuck Fishbein
January 21st, 2012, 12:28 PM
I would not put any oil or anti-seizing liquid within a foot of the lens! It could easily destroy the lens.
I recently had something like this happen with a Mike Tapa adaptor for Nikon.
If it's a K-mount, it's probably not a case of compression as it would be on a screw mount lens. it sounds like a locking pin is not releasing. Is there no release button on the adaptor? Do your other K-mount lenses utilize some type of locking mechanism? Compare a lens and see where it might be hanging up. Is there a way to disassemble the adaptor?
Oren Arieli
January 22nd, 2012, 10:07 PM
Similar issue here, a no-name "dumb" adaptor's release pin sheared off. You should be able to use a safety pin, straightened paper clip or jewelers screwdriver to access the release pin. I've been looking at some (hopefully) sturdier options on ebay. Found one here and ordered it a few days ago.
NEW Nikon Lens to Sony NEX NEX-3 NEX-5 NEX-VG10 adapter | eBay (http://www.ebay.com/itm/NEW-Nikon-Lens-Sony-NEX-NEX-3-NEX-5-NEX-VG10-adapter-/250826367850?pt=LH_DefaultDomain_0&hash=item3a666aa36a#ht_682wt_700)
John Vincent
January 23rd, 2012, 06:45 AM
"Similar issue here, a no-name "dumb" adaptor's release pin sheared off. You should be able to use a safety pin, straightened paper clip or jewelers screwdriver to access the release pin. I've been looking at some (hopefully) sturdier options on ebay. Found one here and ordered it a few days ago.
NEW Nikon Lens to Sony NEX NEX-3 NEX-5 NEX-VG10 adapter | eBay"
Thanks for the link - def let us know what you think of the quality when you get it...