Subject: RE: *ist D sensor and 35mm lens resolution
On 9 Mar 2004 at 17:59, J. C. O'Connell wrote: > wrong, > > I posted data on this about a month ago. Even with a 6Mp sensor > a FF sensor will ALWAYS yeild higher total resolution image than > a APS sensor as long as the lens resolution is not infinite and > it never is. The WILL be an ABSOLUTE difference. But as the Mp > of the sensor goes down and the resolution of the lenses go up, the > difference in total resolution of FF vs. APS will be smaller. OK, so what would be the percentage improvement when using say an A50/1.5 at f5.6? ============================================================================ === give me a lpmm figure, and I will post the difference a FF sensor will make. I only calculated data for a 6Mp sensor so far, so let's assume that. ============================================================================ === > But as we can all see, the Mp of the sensors are going up and the > lenses resolution are essentially fixed (not improving), thus the > case for FF being better than APS is becoming more true every day. > The other thing is that unless you are using the very finest lenses, > which often cost more than a DSLR body, there is even more to be gained > by going FF. I guess what I am saying is that I think it would be more > cost effective to buy an more expensive FF body than to go with APS sensor > and have to buy every lens super state of the art. I would much rather have a FF sensor of 14MP than one with 6MP density. The only practical advantage to using a FF 6MP sensor would be that the lenses AOV would be compatible with film bodies. Cheers, Rob Studdert ============================================================================ ====== Oh no, very mistaken! Yes of course a 14mp FF sensor will be better than a 6Mp FF sensor in terms of resolution, but a 6MP FF sensor is DEFINATELY better than a 6MP APS sensor, not only will the image be sharper due to lens limitations, the FF image will be less noiser due to larger pixel area. The only downside to FF vs. APS for a given Mp is cost. JCO ============================================================================ ===
