Sony A7 Nikonos 15mm Test Image

I took this in a pool a few weeks ago:

Sony A7, Nauticam NA-A7, Nauticam 180 viewfinder, Nikonos 15mm

Apparent distance 1 foot (measured), f/11, 160 second, Manual Mode, Auto ISO @ 200

Focused with Focus Peaking.

I was looking for corner sharpness with rectilinear lens, avoiding use of a large dome.

(I had a little trouble getting the target flat due to spacing of the suction cups vs grout lines. The grout in the corners may be the best indicator of sharpness.

I can't post a JPEG larger than 1000kb)

I was looking for a relatively lightweight, rectilinear wide angle travel rig.

The orange discolouration is sunlight filtered through forest fire smoke, filtered through pool water:(

Looking for opinions, suggestions, comments and discussion:)

Looks great - sharper corners than 99% of uw shots I've seen, however to comment, we need the full size:)

I need this lens on an Ikelite housing

This is a very popular option for the A7-series, very sharp and small.

Snapper Vortex by Jack Connick, on Flickr

Sea Lion by Jack Connick, on Flickr

Hmmmmmm. So when the A7 + Nikonos 15mm are considered against full frame DSLR for wide angle underwater...

Pros:

Beautiful corners

Slightly smaller rig

Much smaller dome/lens on the front

Cons:

Battery life

Manual focus only (not much of an issue on the 15mm)

Negatively buoyant?

The cost of change

I have to admit to being slightly conflicted on my next upgrade, and hoping that what Canon does with the 5D4 will give me an easy decision. Having a 15mm Nikonos lens kicking around doesn't help either!

Liz, I'll take that 15mm Nikonos off your hands -- to help simplify your decision

While I think I could justify to my Dad that I have borrowed it (given he hasn't used his Nik Vs in a few years), justifying sending it to the States might be a little harder. Your offer is otherwise excellent :-)