Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
07-12-2012, 07:43 AM   #1
Sarah N

Inputting focal length of vintage lens to K100D

Help! I have a K100D and have only recently begun experimenting with older lenses that I used with a K1000. I have a K mount Vivitar 100-300 zoom that I'd like to use, but am confused about focal length. When I set the K100D up to use this lens and I see the screen for inputting focal length, what number should I select? Is there just one number to use in this situation, or do I have to go back into the menu and re-select each time I change how far in I'm trying to zoom? Hoping there's a quick and simple answer to this question, as I'm leaving soon on vacation and want to do some wildlife photography. Thanks for any help!

07-12-2012, 07:51 AM   #2
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 49,705
You can just select the lower end of the range. You'll get worse performance at 300mm, but at least none of your photos will have SR-induced blur

  • 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!
camera, help, k100d, length, lens, pentax help
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Inputting focal length? slackercruster Pentax DSLR Discussion 14 02-08-2012 02:26 AM
K100D Focal length input problem newarts Troubleshooting and Beginner Help 3 09-13-2011 03:07 PM
Inputting focal length of a variable lens on my K-x. / Shake reduction problems? TexasLangGenius Pentax DSLR Discussion 7 11-26-2010 11:35 PM
K100D focal length report with SR Andi Lo Pentax DSLR Discussion 9 08-19-2009 10:20 PM
K100D: What focal length to enter? newarts Pentax SLR Lens Discussion 8 12-28-2008 11:33 PM

All times are GMT -7. The time now is 07:50 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]