Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
08-17-2012, 06:33 PM   #1
New Member

Join Date: Aug 2012
Posts: 4
Older Pentax lens

I have a Pentax 35-80mm (autofocus) lens from my last Pentax 35mm film DSLR.
I thought it should be equivalent to, or perform as a 1.5X focal length lens on my 200D, but it does not seem to do so.
I am not sure why this is the case. For instance if I use the 35mm position (so 35 X 1.5 = ~52mm) on the lens, photos are not the same as on my kit lens at 55mm. Not that this really matters but I was surprised.


08-17-2012, 06:55 PM   #2
Site Supporter
jatrax's Avatar

Join Date: May 2010
Location: Oregon
Photos: Gallery | Albums
Posts: 10,770
Focal length is focal length no matter which camera it is on. Compare the 35-80 @ 35mm with the 18-55 @ 35mm and they will be the same.

Unless you change back and forth from FF to APS-C just ignore the whole 1.5x thing it just confuses people. The angle of view will be different on different cameras but the focal length is the same.
08-17-2012, 07:04 PM   #3
Veteran Member
Docrwm's Avatar

Join Date: Sep 2010
Location: Somewhere in the Southern US
Photos: Gallery | Albums
Posts: 11,275
They're both marked using the same scale. Try looking through each viewfinder (the old SLR and the new dSLR) and you'll see a difference in angle of view, but each is marked using the same scale so 35mm on the new should equate to 35mm on the old lens.
08-18-2012, 05:22 AM   #4
Veteran Member
sterretje's Avatar

Join Date: Dec 2008
Location: Roodepoort, South Africa
Photos: Gallery | Albums
Posts: 3,534
Put the 18-55 kit lens on the K200D and set it to 55mm.
Put the 35-80 on your old Pentax SLR and set it to roughly 80mm

The view will be (more or less) the same.


  • 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!
lens, pentax, pentax help
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Using older (pre-digital) Pentax lenses. 3party Pentax K-5 12 01-24-2012 09:27 AM
older fisheye lens lensattack13 Pentax SLR Lens Discussion 9 12-28-2011 11:46 PM
Need help with lens for older ist series DSLR AlexW Pentax SLR Lens Discussion 11 12-08-2010 06:43 AM
Pentax k-x not working with my tamron lens, or older pentax lenses Evanmackmusic Pentax DSLR Discussion 5 06-04-2010 03:24 AM
Older pentax lens with pentax k7 jamh Pentax DSLR Discussion 4 12-12-2009 01:22 PM

All times are GMT -7. The time now is 02:47 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]