Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
07-03-2015, 12:34 AM   #1
New Member
Rexjarvis's Avatar

Join Date: Oct 2014
Location: Friesenheim
Posts: 13
Pentax K-r + Pentax SMC F 35-80mm 1:4-5.6

Hi,

Sorry if this is a daft question but I am wondering about the compatibility of my Pentax SMC F 35-80mm 1:4-5.6 AF Lens and my K-r.

Sometimes the AutoFocus works and other times it does not. When I use it in manual mode it is a really great lens but my problem is slightly blurry eyesight so the AF is really needed, I mess up too many shots in manual mode :-(

Thanks for your help,
Rex.

07-03-2015, 12:52 AM   #2
Loyal Site Supporter
Loyal Site Supporter
max_pyne's Avatar

Join Date: Aug 2010
Location: zurich
Photos: Gallery | Albums
Posts: 408
have you tried to clean the contacts?
07-03-2015, 01:44 AM   #3
New Member
Rexjarvis's Avatar

Join Date: Oct 2014
Location: Friesenheim
Posts: 13
Original Poster
QuoteOriginally posted by max_pyne Quote
have you tried to clean the contacts?
I have used alcohol 96 to clean them and it doesn't help. One time in ten I will attach the lens and everything is fine - the other nine times I have to use manual focus. Could it be the motor?

I take it that they are compatible and this is a problem with the lens?

Last edited by Rexjarvis; 07-03-2015 at 02:31 AM.
07-03-2015, 06:09 AM   #4
Loyal Site Supporter
Loyal Site Supporter
THoog's Avatar

Join Date: Aug 2012
Location: North Carolina
Photos: Gallery | Albums
Posts: 3,604
Almost all old Pentax lenses are compatible with all modern bodies - the FA 35-80 certainly is (I have one, and have never had the problems you describe). If remounting the lens works sometimes, it suggests an electrical problem, either in the lens or body, but I wouldn't think it was the motor. Is it just missing focus, or not turning at all? Do you have any other autofocus lenses?

07-03-2015, 07:06 AM   #5
New Member
Rexjarvis's Avatar

Join Date: Oct 2014
Location: Friesenheim
Posts: 13
Original Poster
QuoteOriginally posted by THoog Quote
Almost all old Pentax lenses are compatible with all modern bodies - the FA 35-80 certainly is (I have one, and have never had the problems you describe). If remounting the lens works sometimes, it suggests an electrical problem, either in the lens or body, but I wouldn't think it was the motor. Is it just missing focus, or not turning at all? Do you have any other autofocus lenses?
Hi,

All my other lenses work fine so the K-r body is fine. It has to be the lens. It is only the focus that is not working, with the camera and lens set to full auto the aperture is always good. I just almost always need to throw the manual focus switch on the camera body because of the focus problem.

Thanks.
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!
af, k-mount, k-r, k-r pentax smc, lens, mode, pentax, pentax k-r pentax, pentax lens, slr lens, smc, smc f 35-80mm
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wanted - Acquired: SMC Pentax-F 35-70mm F3.5-4.5 / FA 35-80mm F4-5.6 telly0050 Sold Items 5 02-16-2012 01:09 PM
For Sale - Sold: SMC Pentax-F 35-80mm f4-5.6, SMC Pentax-FA 28-90mm F3.5-5.6 (Worldwide) Nowhere Matt Sold Items 5 03-02-2011 02:39 PM
SMC PENTAX-A 35-80mm f/4-5.6 Zoom - can be used on my KM and ME Super? altair Pentax SLR Lens Discussion 5 06-29-2010 01:07 AM
For Sale - Sold: Pentax ZX-30 with F 35-80mm 1:4-5.6 lens in Very Good Condition jjdgti Sold Items 4 12-30-2009 12:27 PM



All times are GMT -7. The time now is 11:04 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