dumb adapter suck on lens-oh, great! at DVinfo.net

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

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...

January 20th, 2012, 09:20 PM	#1
Rob Katz Major Player Join Date: May 2003 Location: new york city, new york Posts: 594	dumb adapter suck on lens-oh, great! 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

January 20th, 2012, 10:46 PM	#2
Jim Michael Major Player Join Date: Dec 2005 Posts: 895	Re: dumb adapter suck on lens-oh, great! 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).

January 21st, 2012, 12:28 PM	#3
Chuck Fishbein Major Player Join Date: Jun 2008 Location: Weehawken New Jersey Posts: 210	Re: dumb adapter suck on lens-oh, great! 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?

January 22nd, 2012, 10:07 PM	#4
Oren Arieli Major Player Join Date: May 2007 Location: San Jose, California Posts: 918	Re: dumb adapter suck on lens-oh, great! 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

January 23rd, 2012, 06:45 AM	#5
John Vincent Trustee Join Date: Sep 2005 Posts: 1,065	Re: dumb adapter suck on lens-oh, great! "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...