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

Started Feb 3, 2014 | Discussions thread
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WT21 Veteran Member • Posts: 4,954
Re: Where have all the Focal-reducers gone? (with apologies)

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 <$150. I wouldn't pay metabones pricing for it.

 WT21's gear list:WT21's gear list
Sony Alpha 7 Sony a6000 Sigma 60mm F2.8 DN Art Sony FE 70-200 F4 Sony FE 28mm F2 +5 more
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