Where have all the Focal-reducers gone? (with apologies)

Started 7 months ago | Discussions thread
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Re: Where have all the Focal-reducers gone? (with apologies)
In reply to WT21, 7 months ago

WT21 wrote:

5nex7 wrote:

Yes, IQ remains to be seen.

I have my doubts.. if I believe that a filter in front of a lens will degrade the IQ - and I do believe this, how could I believe that a complex optical system behind the lens would not degrade it, more, it would improve the image ?

I know that there are cheap "universal" tele-adapters which will destroy your image, and expensive, dedicated tele-adapters, matched with high quality 70-200/F2.8 lenses, which will only degrade the image...

Agree, but I would think it's theoretically possible to get a sharper/brighter center, at the expense of the edges. For certain uses, that might be an acceptable trade-off, but, IMO, only for an adapter that cost

Probably exactly as you describe it, center vs edges.
I don't say people should not buy it, try it, play with it, use it.
People buy c-mount lenses... and judge how sharp they are on APS..
I even can agree that a 1.2 lens transformed in F0.9 can be interesting for night shooting.

 5nex7's gear list:5nex7's gear list
Sony Alpha NEX-5N Sony Alpha NEX-7 Sony Alpha NEX-6 Sony a6000 Sony E 18-200mm F3.5-6.3 OSS +54 more
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