Moderator: E.J. Peiker

All times are UTC-05:00

  
« Previous topic | Next topic »  
Reply to topic  
 First unread post  | 5 posts | 
by E.J. Peiker on Sun Jul 30, 2017 9:14 pm
User avatar
E.J. Peiker
Senior Technical Editor
Posts: 86761
Joined: 16 Aug 2003
Location: Arizona
Member #:00002
For those interested in the widest non-fisheye full frame prime lens for DSLRs available, here is my review of the Irix 11mm f/4 lens that was just released:
http://www.ejphoto.com/Quack%20PDF/Irix ... Review.pdf
 

by Jim Zipp on Tue Aug 15, 2017 10:28 am
User avatar
Jim Zipp
Lifetime Member
Posts: 4976
Joined: 21 Aug 2003
Location: CT
Member #:00150
Hi E.J. Great review as always. Because you mentioned the 15mm version in your review I thought I'd ask you a question about it rather than starting a thread of it's own. I've read a review or two that the infinity click stop is way off on some. Not a deal breaker but one of the things I'd love to have for night sky. Both look like a great "toys". Not lenses I'd use much but for the price a nice tool to have in the bag. Thanks.
Jim Zipp
http://www.jimzippphotography.com
 

by E.J. Peiker on Tue Aug 15, 2017 11:50 am
User avatar
E.J. Peiker
Senior Technical Editor
Posts: 86761
Joined: 16 Aug 2003
Location: Arizona
Member #:00002
Jim Zipp wrote:Hi E.J.   Great review as always.  Because you mentioned the 15mm version in your review I thought I'd ask you a question about it rather than starting a thread of it's own.  I've read a review or two that the infinity click stop is way off on some.  Not a deal breaker but one of the things I'd love to have for night sky.  Both look  like a great "toys".  Not lenses I'd use much but for the price a nice tool to have in the bag.  Thanks.
Hi Jim, I haven't tested the 15mm but since both 11mm and f/4 have inherently dramatically more DOF than 15mm at f/2 it would be likely to be much better in that regard.  The Irix lenses do allow you to go past infinity as temperature of the lens as well as the wavelength of light being photographed will make a difference on where infinity actually is.  On any manual focus lens that I own I find infinity at a typical temperature (75 degrees in my case) and then put a small dot with fingernail polish at that point to allow me to get there very quickly.
 

by Jim Zipp on Tue Aug 15, 2017 5:06 pm
User avatar
Jim Zipp
Lifetime Member
Posts: 4976
Joined: 21 Aug 2003
Location: CT
Member #:00150
Thanks E.J.
Jim Zipp
http://www.jimzippphotography.com
 

by Dave Courtenay on Wed Aug 16, 2017 10:01 am
Dave Courtenay
Forum Contributor
Posts: 1707
Joined: 6 Nov 2007
Location: North Carolina
I am looking at the 15mm for night sky's in the himalayas next year and think the Irix could be the answer i am looking for, Wonder how they will cope with temps down to -30

Dave
http://www.wildlifeinfocus.com


A Brit-A Broad
 

Display posts from previous:  Sort by:  
5 posts | 
  

Powered by phpBB® Forum Software © phpBB Group