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Sony A6000 + Lens Turbo II vs Sony A7

Lens: Nikon Nikkor 35mm f/2

Designed in the early 60's, my copy of the Nikkor 35mm f/2 Ai was made in 1981. Nikon's manual focus 35mm f/2 is odd; production ran from 1965 to 2005, and over that forty-year span it retained the original 8 element in 6 group design.

A note on the Lens Turbo II. It's supposed to "brighten" all lenses by one stop, but in reality there is variance in that. With the A6000 coupled Lens Turbo II and the Nikon 35mm f/2 it lets in 1.5 stops more light than the same lens on the A7 at f/2. Around f/8 things even out.

Visibility on this day is well over twenty miles. Shot on a tripod, shutter speeds fast enough to eliminate any kind of shake. Manually focused on the barn just off center, at maximum aperture and focus left there, no adjustments made for focus shift or field curvature. White balance set to daylight. 

Overall field of view with exposure unadjusted; A6000 at 1/4000 ISO 100 and A7 at 1/4000 ISO 200.

In the centerat f/2. The color shift surprises me, as the A7 typically renders more purple than the A6000 when using the same lenses.

In the extreme corner the 35mm f/2 is doing quite well for a fifty year old design.

On to f/2.8

Corners are not incredible on the either combination yet are superior on the A7.

On to f/4

At f/4 the 35mm f/2 starts to sing in all except the last 150px of the corner. On the Lens Turbo II not so much.

Somewhere in here the Lens Turbo II lost the purple color cast, here weare at f/5.6 and white balance is identical.

The corners at f/5.6

Now on to f/8

Corners at f/8

Finally at f/11

Corners at f/11

There isn't a whole lot to say here that the images don't. Nikon's 35mm f/2 shows classic Nikon behavior, sharp in the center wide open, corners improving when stopping down but the very furthest corner remains a touch soft, quite similar to their 28mm f/2.8 AiS. This lens just doesn't seem to get along well with the Lens Turbo II.

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