QUOTE (jd1566 @ Jan 20 2006, 12:33 PM)
Nikon has sensed that the advantage of FF is coming to an end, as Medium Format digital backs come down in price and become more common. Many working pros have opted for the FF Canons because the MF alternatives are simply too expensive, as well as the range of lenses that Canon has. However the cost differential will eventually come down, and FF has very little more to give as pixels are getting pretty small. I expect that 25mpixel will be the maximum practical resoluton the FF chips will be able to give.. beyond that it's diminishing returns because of signal to noise ratio unless a radical new technology is used (such as the much touted Foveon.. that up till now has just been a pipe-dream). Medium format however has only touched the iceberg of pixel miniturisation.. so the advantages that MF film had over 35mm film will be replayed in the near future with MF digital backs, and working pro's in studios the world around will start ditching their FF Canons in favour of the higher quality, which is not just a function of the larger chip size of MF backs, but also because of the fact that most of these are 16 bit capture, not 12 bit like the Canons (16 bit files are created, but capture is only 12 bit, so less dynamic range). ........
Well, this is all my opinion anyway.. Were I Canon at the moment, I would be very worried indeed.. as Nikon's strategy may prove right.
The current 3 formats, APS-C, full frame 35mm, and cropped 6x4.5 as in the P45(actually 47x39mm), are simply different sized formats, each one having an inherent 'picture' resolution advantage in proportion to the sensor size, but not it seems in proportion to price.
The size difference between APS-C (with the 1.5x crop factor) and FF 35mm is actually greater than the size difference between the P45 and FF 35mm.
All else being equal and assuming that lens and sensor technology is exploited to the full, you cannot expect any sensor to ultimately compete with one that is 2.5x the area. 2.5x the area might not always deliver the theoretical 58% increase in resolution, but I see no reason to suppose that the difference need be any less than the current difference between the 39MP P45 and the 16MP 1Ds2.
You can be quite sure if the price of MF backs falls to affordability for the masses, the difference in price between APS-C and FF 35mm bodies will be so inconsequential in relation to the price of lenses, it won't matter. Any undeniable picture quality, resolution or ultimate picture size advantage that can be bought for a few hundred dollars more, will ensure the continued viability of FF 35mm.