Well, it's supposed to help with noise, not so much grain. Noise is introduced by the scanner's electronics. Grain is ingrained😛 in the film, all pun intended. If you see noise, multi-colored dots or obvious chromatic noise, then a multi-pass SHOULD help with that. The more samples you take, the less the noise should show through. If you don't see much noise to begin with there's not much to get rid of.Multiple scans are supposed to reduce grain and noise. Well, I might need new glasses, but I can not see all that much difference.
Declared mechanical resolution is not optical resolution. Optical resolution for Plustek 7600 is around half of the declared resolution (3300 dpi).The 7600 with the supplied SilverFast software has an optical resolution of 7200 dpi
Color scans in your review are quite noisy, imho.Ohh, right - does not seem to be much noise in the scans.
i have this film scanner, which i might sell if i keep my newly acquired m8. but i just wanted to say that the photo captioned 'BW film IR dust removal is a no-go' looks absolutely amazing to me!
Declared mechanical resolution is not optical resolution. Optical resolution for Plustek 7600 is around half of the declared resolution (3300 dpi).
Color scans in your review are quite noisy, imho.
Hmm - I mainly see grain from the 200 ISO colour negative film, but I must say that it can be hard to tell apart.
The official specs. for the 7600 says 7200x7200 optical res. Could you please elaborated on the difference between mechanical and optical resolution?
Many cheap scanners have poor quality lenses in them that reduce the real resolution quite a bit. The scanner has 7200 pixels per inch in its sensor, but the lens isn't good enough to actually capture that much detail from the film. One reason the Nikon scanners cost so much new, and why they're still in high demand is the fact that they use very sharp Nikkor lenses with ED lens elements. They capture the full resolution.
The official specs. for the 7600 says 7200x7200 optical res.
The official specs. for the 7600 says 7200x7200 optical res. Could you please elaborated on the difference between mechanical and optical resolution?
Here is a proper test of this scanner.
Regarding the noise (I wasn't talking about grain or 'grain' in color film), take a look at scans of dark scenes in the review I linked. Can you see green pixels in deep shadows when MultiExposure is not enabled? Can you see green pixels (and magenta) in your scan on the dark face of the rock? Try MultiExposure, it might help.
Sometimes this cure is something you don't want, so you have to take that other pill (ME, MS).Look at this for the cause and cures for this kind of noise.
The numeric ppi value of the scanner's resolution is immaterial. The look and sharpness of the scans is why it's important to have high ppi. Your 100% crop example looks plenty detailed and sharp. You could photograph a chart, then scan it to get an idea of the actual resolution if the numbers are important to you.
IR dust removal is great for color negatives, but as silver grains also reflect IR, it is not designed for b&w negatives.
Now the actual resolution is not that important to me, but it obviously is to some.