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Photo Forum / Digital Photography / DSLR Cameras / October 2006Fuji S5 14bit A/D
http://www.dpreview.com/news/0609/06092502fujifilms5pro.asp#specs > http://www.dpreview.com/news/0609/06092502fujifilms5pro.asp#specs Odd the new Pentax K10D has a 22 bit ADC.... http://www.dpreview.com/articles/pentaxk10d The Pentax K10D is the camera the Nikon D80 "should have been" Darrell Larose http://DarrellLarose.ca >>http://www.dpreview.com/news/0609/06092502fujifilms5pro.asp#specs > [quoted text clipped - 3 lines] > > The Pentax K10D is the camera the Nikon D80 "should have been" I finally looked at the K10D preview and I see it's got a choice between PEF and DNG. Very nice. Hopefully the other manufacturers will follow suit. Greg  Signature"All my time I spent in heaven Revelries of dance and wine Waking to the sound of laughter Up I'd rise and kiss the sky" - The Mekons >> Odd the new Pentax K10D has a 22 bit ADC.... I don't think that 22 Bit makes much sense, as the sensor noise limits the accuracy to much less than 1:2**22. OTOH the report states that JPEG conversion limits the accuracy to 8 Bit. That is not true as JPEG format is stored gamma corrected and this increases the accuracy by 2 to 4 bits in the dark areas. So 12 to 14x Bits seems like a good compromise, offering enough headroom. -Michael >>> Odd the new Pentax K10D has a 22 bit ADC.... > [quoted text clipped - 7 lines] > > -Michael I think it's more relevant that if the full well capacity is, say, 80000 electrons, then 17 bits are enough to count every single one. Not many DSLR sensor will have a full well capacity over that. And in terms of accuracy, using more bits in the AD converter will not offer any advantage. There might be advantage to more bits when doing manipulations on the data, but one could still use a 17 bit converter and then switch to eg 22 bit representations (there might be rounding errors, though I have no clue as to the preactical aspects of this). > http://www.dpreview.com/news/0609/06092502fujifilms5pro.asp#specs First class camera, no doubt, but surprising that they didn't up the ante to at least 8 Mpix. Signature-- r.p.e.35mm user resource: http://www.aliasimages.com/rpe35mmur.htm -- r.p.d.slr-systems: http://www.aliasimages.com/rpdslrsysur.htm -- [SI] gallery & rulz: http://www.pbase.com/shootin -- e-meil: Remove FreeLunch. >> http://www.dpreview.com/news/0609/06092502fujifilms5pro.asp#specs > >First class camera, no doubt, but surprising that they didn't up the >ante to at least 8 Mpix. Someone suggested it could have been Nikon forcing their hand owing to their use of the D200 body. Otherwise, it could be Fuji who like Sigma have claimed higher resolution than traditional CCD/CMOS sensors for a given pixel count. I'm sure it will be a nice camera, but I wonder why Fuji is avoiding the entry-level? Could it be they've surmised the mindset of the entry-level buyer is solely geared toward more megapixels as a sole determinant of quality? |
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