Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
06-11-2009, 03:51 PM   #1
Veteran Member

Join Date: Mar 2007
Location: Nove Zamky, Slovakia
Photos: Gallery | Albums
Posts: 7,181
645 lenses on APS-C

jsut a couple of quick questions.
a) putting 645 format lens on APS-C DSLR how would the FOV compare?
say 200mm FF lens on APS-C generates 300mm FOV
200mm 645 lens mounted on DSLR would generate FOV equal to ....?

b) are there good "A" adapters from 645 to K?


Last edited by axl; 06-11-2009 at 04:41 PM.
06-11-2009, 06:02 PM   #2
Veteran Member
kristoffon's Avatar

Join Date: Aug 2008
Location: Brazil
Posts: 532
The focal lenght doesn't change. A 200mm MF lens will give the the same FOV you'd get from an APS-C 200mm lens.
06-11-2009, 11:59 PM   #3
Veteran Member

Join Date: Mar 2007
Location: Nove Zamky, Slovakia
Photos: Gallery | Albums
Posts: 7,181
Original Poster
ok get it...
sorry for silly question. It was too late in the night when I was writing it...
So 200mm 645 lens on APS-C will give me roughly 300mm equivalent on FF, right?


  • 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!
200mm, aps-c, dslr, fov, k-mount, lens, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Why doesn't Tokina make Pentax mount APS-C lenses? hyyz Pentax SLR Lens Discussion 2 04-02-2010 12:42 PM
Field of View Tables, APS-C, 24x36, 645D, 645, 6x7 Ole Pentax Lens Articles 0 03-14-2010 06:38 PM
6x7 or 645 on APS-C Dubesor Pentax SLR Lens Discussion 21 01-10-2010 07:39 PM
Thoughts: K30D, APS-H, Ultrawide lenses jfsavage Pentax News and Rumors 59 02-16-2009 10:51 AM

All times are GMT -7. The time now is 03:43 AM. | 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]