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Interesting discussion on NEX Flange back -- issue or not?

WT21

TalkEmount Top Veteran
Joined
Aug 7, 2011
Messages
655
Interesting bit on sonyalpharumors.com.

http://www.sonyalpharumors.com/zeis...enses-tested-on-the-nex-5-photozone/#comments

Read the comments, too. There are interesting layers to this. It will be interesting to see how the new bodies work out.

I think there are two issues -- getting closer AND going wider (because of the larger sensor). I guess also digital is more susceptible to this issue than film was, which might explain why Canon hasn't released a compact mirrorless, like I dearly want them to (that, and not wanting to kill off their DSLR business, but it seems the engineering is more than just simple. Could you imaging the angle of incidence in trying to cover a 2X larger sensor than the m43 sensor, with a short flange back, if the NEX is having issues?

The discussions on sonyalpharumors, and then the link through there to a Fred Miranda discussion were interesting reads, and the jury still seems out.

p.s. -- this bit does some nice explaining http://www.fredmiranda.com/forum/topic/1030741/1#9793822. It is interesting to learn that Leica does in-camera software correction! I didn't know that.
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Amin Sabet

Administrator
Joined
Aug 6, 2011
Messages
1,972
The NEX mount registration distance only applies to native lenses. For adapted lenses, the registration distance depends on the adapter and would be the same for a given adapted lens whether it was used on a Micro 4/3 body or an NEX body.

In general, the problem with corner performance and adapted lenses (especially wide angle lenses with short flange back distance) is that digital sensors don't hand oblique light as well as film does. By choosing a short registration distance, Sony knew that native NEX lenses would struggle with this issue; HOWEVER, as sensor technology (offset microlenses, etc) and image processing improve, the corner performance of those existing lenses will also improve. From the beginning, I've always thought it was a good gamble from Sony to choose a very short registration distance for the mount.
 

BruPri

TalkEmount Regular
Joined
Aug 7, 2011
Messages
98
I click it on my Nikon adapter for my adapted lenses and the images look great to me, any issues I'm probably happily ignorant of...
 

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