I am always glad if companies give us OPTIONS to choose from.
For ME: The EF 40mm lens is the holy gral of pancakes because I like the 64mm equivalent on my APS-C cameras. Just for the EOS M it will make a compact lens. If I need 24mm the old and trusty 2.8/24mm will be fine.
For ME: The EF-M 22mm 2.0 is the most interesting choice because it makes a COMPACT EOS M camera but ... as said before: A COMPACT EF-M with 2.0 55mm (lens elements in tele configuration) would be much more attractive for ME, especially if combined with IS.
An EF 24mm pancake is not possible for FF SLRs because of the - mentioned by others - necessity to do some tricks with a negative front element far from the positive groups to keep the mirror area free of stuff ...
Just my 2ct - Michael
For ME: The EF 40mm lens is the holy gral of pancakes because I like the 64mm equivalent on my APS-C cameras. Just for the EOS M it will make a compact lens. If I need 24mm the old and trusty 2.8/24mm will be fine.
For ME: The EF-M 22mm 2.0 is the most interesting choice because it makes a COMPACT EOS M camera but ... as said before: A COMPACT EF-M with 2.0 55mm (lens elements in tele configuration) would be much more attractive for ME, especially if combined with IS.
An EF 24mm pancake is not possible for FF SLRs because of the - mentioned by others - necessity to do some tricks with a negative front element far from the positive groups to keep the mirror area free of stuff ...
Just my 2ct - Michael
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