Nex 16mm f2.8 lens Performance on 5n or7

[Robert McGuigan]

Hi there,
Has anybody checked out how much the IQ of the 16mm f2.8 lens is improved by the lens correction features on the Nex 5n and 7 ? I have this lens and a Nex 3 and 5 also the wide angle and fish eye attachments. It would be interesting to find out how much they are also improved especially the chromatic aberration.

Thanks
Robert

 

[Amin Sabet]

There's still some CA, but the edge sharpness and CA seem better on the 5N and C3 than on the 5 and 3. I'm not sure about the 7, but judging from performance of other lenses, I'm guessing the 16 won't perform as well on that.

 

[serhan]

I haven't tested 16mm on Sony nex-5 vs 5n, but I have seen improvement on my CV 12mm lens with nex-5n in comparison to nex-5 as I posted here:

https://www.talkemount.com/f12/voigtlander-12mm-f-5-6-aspherical-ultra-wide-heliar-190/

I don't have nex-7 also, but the Fred Miranda alt forum has lots of tests of wide rf lenses and the conclusion:

With the rangefinder lenses on the Nex 7 the best image quality is reached at f/5.6 in the centre, but for the far corners we need f/11 to get the best sharpness here. At f/11 the centre is already visibly softer than at f/5.6. A compromise might be f/8.
The Sony E ZA 24 on the Nex 7 is at f/5.6 best in the centre and improves a little in the corners at f/8. Optimum aperture across the frame is at f/7.1.

With the Nex 5n it is a little different. The rangefinder lenses perform best at f/8 for centre and corners. The Sony E ZA 24 did best at f/5.6 again in centre and corners.

The Nex 7 requires more stopping down to get the best from edges and corners. However it will also start diffracting at f/5.6. The Nex 5n will get a more even performance out of the camera.

 

[Robert McGuigan]

Thanks for the replies. Serhan I found the info from Fred Miranda very interesting.

Robert