Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
07-23-2010, 12:52 PM   #1
New Member

Join Date: Jul 2010
Photos: Gallery
Posts: 18
Rokinon 8mm focus issues

I've got a Rokinon 8mm fisheye and I can not get it to focus. I've read about infinity being way off, and indeed mine was. When set at about 5 feet, it was in focus @ infinity. So, I adjusted the focus ring, so that was correct. Then, short focus was way off. I set up a test bench, measured out 2 feet, got 2 feet in focus. Then infinity is nowhere to be found.
It's seeming like one of the issues where I'd need a shim or something, but this is a pentax mount lens. I can't figure out a way to move the plane of the lens.
(and honestly the shim thing is a guess. This is the first time I'm trying to figure out a focus issue)

Anyone experience similar issues, or have a solution? I've gotten a replacement lens, and it's exactly the same.

Camera body is k-7.


07-23-2010, 03:13 PM   #2
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 15,400
I have the pro optic version of the samyang 8mm and focus seems right on the scale for me

  • 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!
8mm, feet, figure, focus, infinity, issues, k-mount, lens, pentax lens, rokinon, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Focus Issues JohnKSA Troubleshooting and Beginner Help 4 06-11-2010 04:39 AM
Focus issues bethtphotos Troubleshooting and Beginner Help 27 03-02-2010 09:01 AM
Landscape Rokinon 8MM Snowscape Rupert Post Your Photos! 4 02-13-2010 02:44 PM
Focus issues? benplaut Photographic Technique 23 10-04-2008 02:28 PM
help FA 50 1.4 Focus issues qksilver Pentax SLR Lens Discussion 7 06-23-2008 06:21 PM

All times are GMT -7. The time now is 03:55 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]