Area is only meaningful to advertising copy writers. Presuming you are happy with a 3:4 image 645 is 1.75x the size of 35mm, if you want 2:3 it is 1.55x. So a full 645 format will allow about 1-1/2 times the resolution of a full frame 35mm. That is assuming a 42mm x 56mm format and the same ppi for both.
But looking at it another way you can have bigger pixels, so at the same resolution for both you can have 2+ times the sensitivity. In either case the larger sensor is going to be about 4 times as expensive. There are always trade offs involved. Graywolf Website: http://www.graywolfphoto.com Blog: http://www.graywolfphoto.com/journal/ Adam Maas wrote: > Yes, but the native resolution numbers aren't that much lower unless > you're looking t older lenses, and the area is a whole LOT larger. 645 > alone has 2.7 times the area of 35mm. That's a lot of space to put > pixels in. MF digital is comfortably up to 39MP now and there's likely > room for more. > > -Adam > > On 12/5/07, P. J. Alling <[EMAIL PROTECTED]> wrote: >> Actually, IIRC, with few exceptions, medium format lenses have lower >> native resolution figures that 35mm. They don't need it due to the size >> of the photosensitive surface they're projecting an image on. >> >> Adam Maas wrote: >>> I dunno about that. The 1DsmIII is pushing the limits of what 35mm >>> glass is capable of. While a ~22MP 645D wouldn't necessarily compete >>> well (Although the Mamiya ZD back is selling every unit Mamiya can >>> push out, at a similar cost to the 1DsmIII) a higher-rez unit might >>> well be competetive, and there's a lot more resolution headroom with >>> good MF glass. >>> >>> -Adam >>> >>> On 12/4/07, P. J. Alling <[EMAIL PROTECTED]> wrote: >>> >>>> An interesting user review of the new Canon 1Ds MkIII, which confirms my >>>> feeling that the 645D was swimming upstream without the spawning >>>> possibilities... >>>> >>>> http://www.luminous-landscape.com/reviews/cameras/mada-iiis.shtml >>>> >>>> I would consider this very bad news for an eventual 645D if it were ever >>>> introduced. >>>> >>>> -- >>>> The difference between individual intelligence and group intelligence is >>>> the difference between Harvard University and the Harvard University >>>> football team. >>>> >>>> -- P. J. O'Roarke >>>> >>>> >>>> -- >>>> 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. >>>> >>>> >>> >>> >> >> -- >> The difference between individual intelligence and group intelligence is the >> difference between Harvard University and the Harvard University football >> team. >> >> -- P. J. O'Roarke >> >> >> -- >> 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.
