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Photo Forum / Digital Photography / DSLR Cameras / July 2005Different DSLR sensitivities
http://forums.dpreview.com/forums/read.asp?forum=1019&message=13523054 This is old news, we have seen this before and guess what, it means absolutely nothing. > http://forums.dpreview.com/forums/read.asp?forum=1019&message=13523054 > This is old news, we have seen this before and guess what, it means > absolutely nothing. Unless you're incident flash metering in the studio ...  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. >> This is old news, we have seen this before and guess what, it means >> absolutely nothing. > > Unless you're incident flash metering in the studio ... After your first test you will adjust anyway. >This is old news, we have seen this before and guess what, it means >absolutely nothing. The first slide is metering. The second is noise, but it is not measured at the RAW level with external exposure, so it, too, is subject to metering and noise-reduction in conversion and PP. Signature<>>< ><<> ><<> <>>< ><<> <>>< <>>< ><<> John P Sheehy <JPS@no.komm> ><<> <>>< <>>< ><<> <>>< ><<> ><<> <>>< > http://forums.dpreview.com/forums/read.asp?forum=1019&message=13523054 I posted that data (first chart) here back in Feb or Mar. 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://forums.dpreview.com/forums/read.asp?forum=1019&message=13523054 Yeah, we had a thread about that here like a billion years ago. As I recall, from the description of the article, which I don't have and wouldn't be able to read anyway, they were measuring something, but ISO sensitivity wasn't it. SignatureJeremy | jeremy@exit109.com >> http://forums.dpreview.com/forums/read.asp?forum=1019&message=13523054 > > Yeah, we had a thread about that here like a billion years ago. As I > recall, from the description of the article, which I don't have and > wouldn't be able to read anyway, they were measuring something, but > ISO sensitivity wasn't it. It's interesting idea. I thought the point was to show which cameras has the most noise. Did it fail to do so? >>> http://forums.dpreview.com/forums/read.asp?forum=1019&message=13523054 >> Yeah, we had a thread about that here like a billion years ago. As I >> recall, from the description of the article, which I don't have and >> wouldn't be able to read anyway, they were measuring something, but >> ISO sensitivity wasn't it. >It's interesting idea. I thought the point was to show which cameras has the >most noise. Did it fail to do so? I think so. Noise should be tested with detailed targets, with external metering; not the camera's. Should be done with raw RAW data, too, IMO, as conversion has so many variables. JPEGs are not "the camera", unless the camera only does JPEGs. There really isn't a monolithic noise figure, anyway. The issues are too complex to be handled the way they usually are. Signature<>>< ><<> ><<> <>>< ><<> <>>< <>>< ><<> John P Sheehy <JPS@no.komm> ><<> <>>< <>>< ><<> <>>< ><<> ><<> <>>< |
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