Actually most lenses that aren't retrofocus put out a fairly flat field. Longer lenses are telecentric by design. The curved sensor approach doesn't work with telecentric lenses since the light rays are all parallel. You need a matched lens to get real benefit from it and the benefit comes in reducing the lens size and that's about it.
On Tue, Dec 30, 2014 at 6:52 AM, Darren Addy <pixelsmi...@gmail.com> wrote: > Rather than start a new OT Sony thread, I think I'll just resurrect > this one. I continue to be a wee bit fascinated by what Sony is doing > with their a7 "line". Despite the similar naming convention, they > aren't the same camera (at all) but each seem to have a radically > different sensor inside and each has it's own unique strength. They > all are full frame. Since Pentax has a fairly long track record of > using Sony sensors, I have to believe that Ricoh/Pentax is going to be > selecting from among these sensors for their own future offering(s) in > the full frame arena. > > The one that has my attention is the a7s. Although it is only 12MP its > high ISO performance is off the charts. (If you thought the K-5 family > was great in this regard, get a load of the a7s). Here is a high ISO > video test comparing the a7s with other Sony cameras and a Nikon D810. > https://www.youtube.com/watch?v=KsywiyX1iKE > > Since two areas of photography that I am currently interested in are > low-light endeavors (astrophotography and stormchasing) the a7s > performance has me thinking about selling a kidney. The body isn't > terribly priced (at all, IMHO) but the good lenses for it are not > cheap. For stormchasing, I would probably pair it with the inexpensive > Samyang 14mm f2.8 on it. (That lens outperforms Canon's 14mm in some > significant ways: http://www.extremeinstability.com/lens14mm.html > > Sony has some other things coming down the pike and it will be > interesting to see how they perform and how they are priced. The a9 > (to be officially announced soon) is rumored to have a 46MP full frame > sensor. And I'm very curious to see how the new Sony curved sensor > performs, particularly with legacy lenses. No lens puts out a flat > field, so it would be interesting to see if using a curved sensor > actually made legacy lenses perform better than they did on a flat > sensor (with respects to corner sharpness and coma, in particular). > The first full frame curved sensor is going to be in a new RX model in > 2015. The curved sensor just MIGHT be the biggest leap forward in > digital cameras since we left CCDs and went to CMOS. Time will tell. > > Based upon this plethora of sensors, it would not surprise me at all > if Pentax announced not just one, but two full frame cameras in > 2015... similar in form factor, but featuring different sensors. Or, > like Lucy pulling the football away from Charlie Brown, maybe 2015 > lets Pentax FF wishers down yet again. > > For the record, I'm not pining for a full frame camera. It is the low > light capabilities of the a7s that interest me and they are a function > of the fact that it is a low pixel density, full frame sensor. > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
