Go Back   Steve's Digicams Forums > Digital SLR and Interchangeable Lens Cameras > Pentax Lenses

Reply
 
Thread Tools Search this Thread
Old Apr 7, 2008, 9:14 PM   #1
Member
 
biggyfry's Avatar
 
Join Date: Jan 2006
Location: Nashville Tennessee
Posts: 57
Default

When I mount this lens every thing is ok but if I pick it up and have any upward pressure even the lightest touch causes the contacts to come loose and it takes all pics at 3-4000th also does this in portriat mode. But if i can keep my hand off it works correctly.

Triedlens on my DS and it was OK also tried other lenses on both cameras (sigma and pentax)?

Anyone have this happen to them and should i send lens in to be checked or camera?

Thanks

Chris
biggyfry is offline   Reply With Quote
Sponsored Links
Old Apr 8, 2008, 6:01 PM   #2
Senior Member
 
snostorm's Avatar
 
Join Date: Jan 2004
Location: Chicago Suburb, IL, USA
Posts: 2,770
Default

Hi Chris,

I'lll have to assume that the lens hasn't been damaged in the mount area, and has always functioned in the same manner with the K10. If it used to work well, and now doesn't, then it sounds like it either has worn, or has been damaged to the point where it is no longer within spec.

If it's always been this way, I would guess that you're experiencing one of those rare situations where there's a "perfect" mismatch in you lens and camera mounts. This happens, for example, when a max (+) tolerance part is mated with a max (-) tolerance part, so you get the worst fit possible with parts that are still within factory specs. To the other extreme, I had a friend with a stone stock 1960 Chevy that ran like a Pro Stocker with a blue-printed engine -- just one of those freaks of the manufacturing process.

If the lens is still under warranty, I'd send it in to try to get them to either replace the whole thing or replace the mount. Mention that you have a number of lenses that work correctly with two different bodies, and though this lens works correctly with one, the mount is too loose with the other. Another potential scenario is that they replace the pins with some that are a hair longer, but if there's any visble wobble in the lens to camera mount, I'd consider this contact pin fix unacceptable for a lens under warranty.

If it's not under warranty, and you have a good lens tech in the area, it would be worth getting an estimate to either replace or modify the lens mount. Speaking as an old motocycle mechanic who had to somehow resurrect some very old, obsolete bikes into something approaching road-worthy condition, I would imagine that the mount cams could be either peened or cross-hatched to tighten the body to lens fit.

If none of this is feasible, then I'd probably sell the lens, realizing that if the new owner experiences the same problem, that you'll have to (without any hassle) refund the money and take the lens back and try again. Most likely you won't have to, but realize that this could happen.

Scott
snostorm is offline   Reply With Quote
Old Apr 8, 2008, 8:16 PM   #3
Member
 
biggyfry's Avatar
 
Join Date: Jan 2006
Location: Nashville Tennessee
Posts: 57
Default

Hi Scott-

thanks

As far as I know it has never been dropped or damaged . I am the second owner and loved it on my DS so It is not under warranty so maybe -

A little tapping would help if i can find someone I can trust

thanks

Chris
biggyfry is offline   Reply With Quote
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 10:59 PM.