Originally posted by ckiang
True, but most of that resolution is lost in grain. While even fine speed film probably starts having problems enlarging beyond say, 16 x 24, you can easily do that with a good digital file, even with a lowly 3 megapixel digital file. And with the proper tools, you can do a good print beyond 20 x 30.
First of all, the 150+lp/mm resolution of T-Max 100 already reflects the grain factor.
If you were able to print from 3 megapixel beyond 20 x30 then I would be able to do it with conventional 35mm film. This is what I would do:
a) Scan frame at 1400 dpi (which about 1/3 resolution of consumer film scanner). This will produce about 1400 x 2100 file, which is the same size that 3MP file. Believe me, at 1400 dpi there is no grain visible at all. This scan will have image quality same or better to 3MP image from digicam.
b) Use those "proper tools" and print 20 x 30.
However I am skeptical about quality of such 20 x 30 print. Pictures of that size are normally put on walls, and from the normal viewing distance (1-2 meters), you'll see that details are missing.
If you compare it to print from 6x7 or 4x5 film, you'll be surprised by reach details and tonal range of fine print.