Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
07-16-2013, 02:15 AM   #1
New Member




Join Date: Feb 2013
Posts: 4
Tamron 70-200mm F2.8 Di LD Macro mechanically loose

My Tamron 70-200 shows the following problem:
- twist the lens slightly so that it moves in the mount
- as a result, aperture info stops showing in the display - you can take pictures, though
- twist it back and it's OK again
I have interpreted this as simply a mechanical tolerance, which leads to a contact break in the spring contact between the lens and the camera body.

Anybody else had similar problems?
I can live with this but have also considered Pentax purchasing 60-250. It's with WR and SDM but only f4.0 and quite expensive. The 300 mm SDM would also be great but again not for free.

07-16-2013, 04:07 AM   #2
Veteran Member
ChooseAName's Avatar

Join Date: Aug 2009
Location: Southeast USA
Photos: Gallery | Albums
Posts: 390
QuoteOriginally posted by jarimakila Quote
My Tamron 70-200 shows the following problem:
- twist the lens slightly so that it moves in the mount
- as a result, aperture info stops showing in the display - you can take pictures, though
- twist it back and it's OK again
I have interpreted this as simply a mechanical tolerance, which leads to a contact break in the spring contact between the lens and the camera body.

Anybody else had similar problems?
I can live with this but have also considered Pentax purchasing 60-250. It's with WR and SDM but only f4.0 and quite expensive. The 300 mm SDM would also be great but again not for free.
My copy of this lens jiggles in the circular vector of motion (as opposed to radial), i.e. it twists a little bit. I do not get the problem that you get though - operation of my copy has been flawless. Perhaps this is some sort of design flaw where you happened to get one that was just out of tolerance, and I happened to get one that was within.
07-16-2013, 10:22 PM   #3
New Member




Join Date: Feb 2013
Posts: 4
Original Poster
You're probably right. I tested many of my other lenses similarly for mechanical tightness on my K-5 and there is always some room to play but the tolerances seem to be tighter. However, my only other bigger lens is the 50-135 SDM which is weather sealed.
07-16-2013, 10:36 PM   #4
Veteran Member
crewl1's Avatar

Join Date: Jul 2010
Location: Los Angeles, CA
Photos: Gallery | Albums
Posts: 9,795
Solved:


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!
contact, k-mount, lens, pentax lens, sdm, slr lens, tamron, tamron 70-200mm f2.8, twist
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: Tamron 70-200mm F2.8 Di LD Macro HSV Sold Items 3 10-12-2012 11:05 PM
For Sale - Sold: Tamron 70-200mm F2.8 Di LD(IF) Macro ecwoj Sold Items 12 01-22-2012 05:15 PM
Tamron SP AF 70-200mm F2.8 Di LD (IF) Macro review gkopeliadis Pentax SLR Lens Discussion 5 06-18-2008 09:52 AM



All times are GMT -7. The time now is 03:01 AM. | See also: NikonForums.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