Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
03-10-2011, 09:05 PM   #1
New Member

Join Date: Mar 2011
Posts: 7
Bought a few used lenses

Hey guys,
I recently bought 3 used lenses, and two of them I couldn't find much information on. I mainly bought these because I wanted to try out something other than the kit lens and didn't want to spend too much $ on new ones, given I don't really know what kind of photography I want to focus on.

One is a Vivitar 28-70mm 3.5-4.8 macro/zoom and the other is a sears 28mm 2.8 macro/wide angle prime.

I also bought a 50mm 1.7 prime which has been pretty fun to experiment with. All of these are A lenses so I don't have to move the aperture ring by hand.

But I was wondering... when I put the Vivitar on, it asks for the focal length. Given that it's a zoom... what should I put there? The max? Sorry if this is a dumb question

Attached Images
03-10-2011, 10:32 PM   #2
Inactive Account

Join Date: Jul 2010
Location: Chicago
Photos: Gallery
Posts: 672
It's asking you that for the SR. Put in whatever you think you'll be shooting at most. It adjusts shake reduction based on focal length.
03-11-2011, 07:13 AM   #3
Veteran Member
sterretje's Avatar

Join Date: Dec 2008
Location: Roodepoort, South Africa
Photos: Gallery | Albums
Posts: 3,534
See if you can find some posts by, if I'm not mistaken, m42man. I think he had some scientific approach to it what would be best.
03-11-2011, 07:25 AM   #4
Site Supporter
Site Supporter
boriscleto's Avatar

Join Date: Dec 2009
Location: Liverpool, NY
Photos: Gallery
Posts: 12,891
The manual say to set it midway between the longest and shortest focal length.

03-11-2011, 08:08 AM   #5
Veteran Member

Join Date: Mar 2009
Location: Chicago suburbs
Photos: Albums
Posts: 848
I just guess at what I think I'll use for the zoom, holding more to the short end. For a 28-70 I'd put in 40, but that's just me. Try different settings and find what you like.

  • 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!
k-mount, lenses, pentax lens, slr lens, vivitar
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Finally Bought Some Decent Lenses! Colorado CJ Pentax SLR Lens Discussion 13 12-05-2010 12:11 PM
Bought a Couple Old Lenses krp Pentax SLR Lens Discussion 16 10-14-2010 02:06 PM
just bought a samsung GX1S need help for lenses. naughty.smurf Troubleshooting and Beginner Help 5 03-15-2009 11:20 AM
Bought a couple of new lenses, but are they any good? atrox Pentax SLR Lens Discussion 16 01-09-2009 10:37 AM
Just bought a DA 50-135--flash help, and returning lenses riotsquad Pentax DSLR Discussion 1 06-26-2008 04:26 PM

All times are GMT -7. The time now is 04:26 PM. | See also:, 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?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]