Irix 15/2.4

[stenrasmussen]

A few more with the Irix. The lens is slowly growing on me to the extent that I will keep it. Early trials also suggest is does really well in the infrared domain.

[Bjørn Rørslett]

Seems your present copy is a good performer indeed. I'm worried about the maker's consistency and quality control though, as you got a bad sample first, didn't you?

[stenrasmussen]

Seems your present copy is a good performer indeed. I'm worried about the maker's consistency and quality control though, as you got a bad sample first, didn't you?

It performs well. The first sample wasn't really bad but the nerd in me just wanted the best copy. One thing is for sure; the build quality is marvelous! I'll pop an IR image in here soon.

[Bjørn Rørslett]

Well, the fact you perceive quality difference between samples should trigger an alarm bell or two.

[stenrasmussen]

Sorry about the repeating and boring scene...
Infrared 720nm modded D5300.

[stenrasmussen]

Well, the fact you perceive quality difference between samples should trigger an alarm bell or two.

Buyer beware...

[Bjørn Rørslett]

I have the impression of an IR hot spot?

[stenrasmussen]

I have the impression of an IR hot spot?

That must be the processing. Here's a shot at f/13 kept dark to try and emphasize a potential hot spot. But, with different lighting and a different camera it might happen.

[Erik Lund]

Thanks for the updated information Sten! Enjoy

[longzoom]

This is very informative, Sten! Thank you!  LZ

[stenrasmussen]

A little comparison of corner performance with the AF-S Nikkor 10-24/3.5-4.5 on the D500 and the Df. The scene was focused on manually via LV. The Irix wins.

[Erik Lund]

Very clearly indeed! Thanks Sten

[Arninetyes]

For anyone who has An Irix 11 or 15 and uses Photoshop or Lightroom, lens profiles have been released. Here is the download page:  http://en.irixlens.com/downloads

[Tri-x]

Just seen someone here in NL offered his one for sale on Facebook.
Unfortunately the aperture control is done electronic so will not work on my F2AS

[David H. Hartman]

For night time photography I actually like the Irix better than the Samyang.
Two Three shots from my test tour this evening:

It may be just a test shot but I like the 3rd one very much. I think I'd take a thin slice off the top.
No I'd take a bit more off the top and make the photography a very wide landscape. The curve over the white building is very graceful.

Dave