On 8/11/2018 11:17 PM, Mr. Man-wai Chang wrote:
On 8/12/2018 1:19 AM, nospam wrote:

Should we always compare 135
film against CMOS sensors of different size?

always the same size format. otherwise it's not a valid comparison.


In reality, we just need to do the job right and fair, not about
comparison or superiority!

What if... a big what if.... all CMOS on Earth were fried by solar
storm? Maybe that explained why a man is up there in ISS.

This is sort of an answer to the original question.

quote: "The resolution of film images depends upon the area of film used
to record the image (35 mm, medium format or large format) and the film
speed. Estimates of a photograph's resolution taken with a 35 mm film
camera vary. More information may be recorded if a fine-grain film is
used, while the use of poor-quality optics or coarse-grained film may
yield lower image resolution. A 36 mm × 24 mm frame of ISO 100-speed
film was initially estimated to contain the equivalent of 20 million
pixels,[6] or approximately 23,000 pixels per square mm. "


In my experience, my 12 mega pixel Olympus camera gives me pictures as
good as my Old Miranda Camera with a good slide film.


With a chemical camera the resolution is limited to the grain size in a
film. However with a print the quality of the paper the images is
printed on will also affect the resolution in the print

With a digital in my opinion has a large range of light conditions under
which you can get good images.

With all of the above, in both types of camera it is the lens system.
Poor quality lens gives poor quality images regardless of the film or
CMOS. As an example I have a cheap phone with a 1.3 megapixel camera.
It gives me consistently better pictures than my tablet which has a 2
megapixel CMOS. This is evident in that with the phone I can easily get
readable images of printed pages, but impossible with the tablet.

In other words with lens systems you can not make a silk purse out of of
a sow's ear, no matter how you process.