Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
10-30-2010, 07:45 PM   #1
Junior Member




Join Date: Aug 2010
Photos: Albums
Posts: 44
Knock-off Adaptall K mount adapters

Does anyone have any experience with these? I am just worried about them mucking up the lens to film place distance, or something like that and ruining the IQ. Ebay is littered with these cheap adapters.

here are some examples

Tamron AD2 Adaptall 2 Adapter to Pentax K10D K20D Km K7 on eBay.ca (item 260520261372 end time 03-Nov-10 07:58:26 EDT)

Tamron AD2 Adaptall 2 Adapter to Pentax K10D K20D Km K7 on eBay.ca (item 290422543065 end time 03-Nov-10 01:22:50 EDT)

Tamron AD2 Adaptall 2 Adapter to Pentax K10D K20D Km K7 on eBay.ca (item 320408986688 end time 29-Nov-10 02:48:24 EST)

Thanks in advance

10-30-2010, 09:36 PM   #2
Moderator
Site Supporter
Blue's Avatar

Join Date: Jun 2008
Location: Florida Hill Country
Photos: Gallery | Albums
Posts: 17,214
Those don't have the A capability and the price isn't that much of a savings over the genuine P/K Tamron mounts. I would just wait it out and try to get the real thing. I haven't seen a knockoff for the PKA mount yet.
10-30-2010, 11:21 PM   #3
Site Supporter
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 27,814
QuoteOriginally posted by Blue Quote
Those don't have the A capability...
Worse than that, they don't couple at all with the aperture mechanism for either the camera or the lens, so you don't even get Pentax-M functionality. At best, you get a fully manual aperture. At worst, you would be forced to shoot wide open. I would pass. The P/K version is both common and cheap enough and works well in green button M mode with current generation Pentax dSLRs.


Steve
10-31-2010, 05:14 AM   #4
Junior Member




Join Date: Aug 2010
Photos: Albums
Posts: 44
Original Poster
Wow. Didn't realize they didn't even have the ability to stop down the lens. Pretty major functionality. Thanks.

10-31-2010, 03:49 PM   #5
Senior Member




Join Date: May 2009
Location: Delaware
Posts: 177
No aperture coupling so no ability to stop the lens down. Waste of money. The original P/K or KM adapters are still readily available from the used market.
11-01-2010, 10:47 AM   #6
Pentaxian




Join Date: Jul 2010
Location: Oregon
Photos: Albums
Posts: 1,418
I use a knock-off Tamron mount on my 500mm mirror lens, which doesn't need aperture control. It's quite solid and slop-free.
11-01-2010, 11:10 AM   #7
Pentaxian
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 15,401
what they do have, which caught my interest is a thicker flange than the flanged mount M42 to K mount adaptor.

These might just have more use doing lens mount conversions so you can avoid filing the heads off the screws.

the M42 flanged adaptor only has about 0.8mm thick base, which is hard to drill for use with counter sink or counter bore screws.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
ad2, adaptall, ebay.ca, item, k-mount, k10d, k20d, k7, km, pentax lens, slr lens, tamron, time
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
adapters for non-K-mount lenses to Pentax K-mount DSLRs: new dimensions for LBA Douglas_of_Sweden Pentax Camera and Field Accessories 152 07-29-2017 05:47 AM
Third party adaptall adapters Silverkarn Pentax SLR Lens Discussion 3 09-05-2010 01:47 PM
For Sale - Sold: PK/A Adaptall 2, OM Adaptall 2, Adapters, Filters, More... photobizzz Sold Items 1 09-30-2008 03:04 PM
Tamron Adaptall and Adaptal 2 adapters ChipB Pentax SLR Lens Discussion 12 07-12-2008 07:37 PM



All times are GMT -7. The time now is 03:12 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top