Need help, Please " the Lens factor of EOS-M ?"

[bainsybike]

There's no 'M-factor'. Just multiply by 1.6x. The 22mm f/2 pancake gives the FoV of a 35mm lens on FF (35mm film), and the DoF of f/3.2 (if you frame the scene the same, and that's because you'd be further away with 22mm on the EOS M than 35mm on FF, and more distance means deeper DoF).

Is that correct, Neuro?  You'd be further away with the M if you were using the same lens on both cameras, but in the above scenario won't both cameras be at the same distance?

[neuroanatomist]

There's no 'M-factor'. Just multiply by 1.6x. The 22mm f/2 pancake gives the FoV of a 35mm lens on FF (35mm film), and the DoF of f/3.2 (if you frame the scene the same, and that's because you'd be further away with 22mm on the EOS M than 35mm on FF, and more distance means deeper DoF).

Is that correct, Neuro?  You'd be further away with the M if you were using the same lens on both cameras, but in the above scenario won't both cameras be at the same distance?

True, I didn't phrase that very well…sorry.  22mm on FF vs APS-C, you're further away on APS-C so DoF is deeper.  22mm on APS-C vs. 35mm on FF, you're at the same distance, but the focal length is shorter on APS-C, so DoF is deeper.

Bottom line, the FF equivalent of the 22mm f/2 on APS-C (i.e. EOS M) is a hypothetical 35mm f/3.2 lens.

[bainsybike]

Thanks, Neuro!!

[fsgray]

Bottom line, the FF equivalent of the 22mm f/2 on APS-C (i.e. EOS M) is a hypothetical 35mm f/3.2 lens.

Okay, thanks!  I've learned so much in the last few weeks, catching up with technology.  I'm really impressed with this kit, such quality in such a small package compared to the old days!

Funny that the only prime available for this camera is a wide angle.  I sure would like to see a telephoto prime.  Even the zoom only goes to 55mm.  I'm starting to look at 85mm lenses plus the adapter.  There don't seem to be any reliable rumors of anything EOS-M of interest.