The Sweet Spot

RLight wrote:

sobrien wrote:

RLight wrote:

...

The one thing Canon lacks for the M system at this junction, a "party lens" that is a faster equivalence zoom. Granted the 32mm and 22mm primes can do that duty, and do it ultra-compact which is the point of the M system (to have something powerful, but small and light and doesn't break the bank), but lens swaps during special events is not desirable. That's where I still reach for my EOS R and RF 28-70 f/2L where I never swap lenses, period as it's 5 primes in a single zoom essentially. Be nice to see an f/2.8 zoom of some kind as I personally even though I enjoy the image quality of the EOS R, would like to see something although won't match my EOS R and RF 28-70 f/2L aka Goliath, I'd like David aka my EOS M setup, have a smooth stone to slay Goliath with, filling the single lens gap that presently exists.

Nice review!

Such a f/2.8 party lens would inevitably be pretty big and heavy, though, which would largely defeat the benefits of the EF-M system that you describe. It would not be materially different in that regard to carrying your R with the RF 24-105 or perhaps, further down the line, a smaller RF 24-70 f/4 or similar.

Where EF-M shines is with its small, portable and very high quality primes like the 22m and 32mm.

Not true, I believe both the patented EF-M 15-45 f/1.8-3.5 and EF-M 15-75 f/2-5.6 should fit in the confines of 55mm filter thread and sub 500g.

Neither of those are a f/2.8 lens, to be fair.

However note in both patents it's not a constant zoom; a lot of the weight kicks in with longer and faster optics. By relaxing to f/3.5 by 45mm or f/5.6 by 75mm, keeps that filter thread and the amount of glass down and giving us an offering much faster than both the zooms we have now that start at f/3.5 and end at f/6.3. Canon can. The question is, will they dare jeopardize their precious RF mount with such an offering? Time will tell.