Originally posted by Colbyt I guess the 126, ( or was it really 127?), would work in the 120 holder. Right now one of those two Canons are looking like the best choice.
126? Do you mean roll film or Instamatic cartridge? Likewise for 110?
126 cartridge is the same width as 35mm film, so the 35mm negative holders may work.
110 cartridge is the same width as 16mm film, so a 16mm negative holder may work.
127 is narrower than 120 and may require a custom holder.
620 should be usable with the 120 holder.
Here is the Wikipedia article on film format sizes. You should be able to use it to determine what holders will work with which films:
Film format - Wikipedia, the free encyclopedia
In regards to batch scanning...it all depends on the software, the scanner, and the film holders used. Some flatbed scanners are limited to a single film strip per scan due to the size of the light source in the lid. Others have a full width light lid and can do multiple slides/strips per pass with the appropriate software.
If you are considering VueScan, don't be put off by the Web site. It is actually pretty decent software. The user interface is a bit weird, but that is typical of scanner software in general. The good part is that an evaluation copy is free to download.
BTW...if you are intending to scan old family photographs and have access to the prints, you may get better results scanning those. Old negatives are often in fairly poor condition and difficult to scan successfully, particularly if the scanner lacks Digital ICE or similar scratch removal technology.
Steve