With film I also never used ISO more than 400. but It was with film i learnt the meaning of "bulb" and the use of a light meter to determine just how long the shutter would need to be open before the exposure was right
I also found that the wonderful tonal range transparency film gave was tempered by poor tolerance to shoddy exposure.
I also got to learn to live with "grain"
Im not advocating getting careless with digital but it does (IMHO) give a lot more scope with experimenting with value's ( ISO shutter speed : and exposure times) in an inexpensive way in the way film never could. And the results are instantaneously review able
Quote:
Originally Posted by bodoman i have always been under the impression that the values are the same, cant see why the wouldnt be, unless someone knows different |
I don't know different
but
I'm not sure the ISO values can be compared directly as
With film : same ISO speed exposed identically did not result in the same image because individual films had "character"
Similarly an Image taken with ISO 100 on 2 different digital cameras ( or DSLRs) with same exposure time and aperture may be more dissimilar than similar Noise, notwithstanding
The newer Cameras with better noise profile at high ISO are rightly making the end user ask why this is not the norm as using Higher ISOs allow more creative use of available light without needing to sacrifice IQ. I don't use noise reduction software routinely as there is often no need to: Canons CMOS sensors do a great job a lot of the time. Noise reduction can soften an image and remove fine detail +noise in which case Id rather keep the noise.
The last time I needed noise reduction majorly was from a CD of images scanned from film ISO 400