Is 14mm wide enough?

Started 2 months ago | Discussions thread
Kirnbichler Contributing Member • Posts: 534
Re: Is 14mm wide enough?
2

As usual, it depends on what you want to do and what amount of practice you're willing to invest.

I'm kind of an UWA aficionado, having begun on APS-C with a 10-20mm lens and then an 8-16mm lens. 
Though it's only two millimetres difference, the impact on viewing angle is quite evident, as are the effects of even slight imperfections in lens alignment. A tilted horizon or a tilted z axis has more impact the shorter the lens is.

As I switched to full frame, I used an older copy of the Sigma 12-24mm (viewing angle equivalent of the 8-16mm on APS-C), but soon began to see strange phenomena in image sharpness, which were caused to a non-flat focal plane of that lens, and were more noticable due to the higher resolution of my full-frame camera. That might be related to the older design of that lens; newer versions Sigma didn't make for the lens mount I used at that time.

I then got "one wider" with an 11mm prime lens, the widest possible on a DSLR. That lens, an Irix, was an eye-opener, much better IQ than aforementioned Sigma.

In fact, that was about the best lens at all I had for my DSLR.

Last year I took the dive and did the unthinkable, a system change. Which led me to the Z 14-30, which seems to be on par (or at least very close to it) the 11mm prime, in regards of image quality, on an even higher-resolving sensor (45 instead of 35 mpix).

I admit, I'm thinking about going even wider, eventually, being enabled to do so by the shorter flange distance of the Z mount, and get the 9mm prime from Laowa/Venus Optics.

This will be quite the challenge to use, as the difference to the 14-30 is 5mm, which is enormous.

I've also tried a fisheye, but with that, correct alignment seems to be more difficult as with a rectilinear lens, as it's very hard to see around the distortions in the viewfinder. I'm sure that this will improve with practice.

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