Antono Refa said:
2) The f-stop difference is much smaller than in the wider lenses. IMHO, there would be more competition between an 85mm f/1.8 IS USM & an 85mm f/1.4L USM than there is between a 24mm f/2.8 IS USM & a 24mm f/1.4L USM.
Good insights -- appreciate the post. Re #2 above, it's an interesting theory. The 50mm focal length in particular (and the 85 somewhat as well) can deliver large aperture lenses relatively inexpensively compared to other FLs. Currently, we have:
50mm f/1.2L II USM @ $1,349
50mm f/1.4 USM @ $349
50mm f/1.8 STM @ $125
(this same sort of price falloff in other FLs one would imagine would require a good stop max aperture difference per price point)
But that is not to say that the jump from f/1.4 to f/1.2 costs $1000 to deliver. Not at all. I contend a great deal of that L vs. non-L cost in other places -- quality/solidness of build, proper ring-type USM, more elements, more aperture blades, weathersealing, etc.
And there's also that nutty notion of double gauss vs. a retrofocus design. You could have two radically different 50 f/1.4 designs. For instance, a general use inexpensive non-L 50 f/1.4 IS will not steal L business if the light falloff / rendering isn't as good.
So this gives Canon a canvas of elements of a design -- IS vs. no IS, DG vs. retrofocus, sealed vs. not sealed, max aperture, focusing technology, IS vs. no IS, etc. to 'Frankenstein' together a stable of different 50s to serve various needs.
I argue the place between 50 f/1.8 STM and 50 f/1.2L II is the place that needs attention the most. Canon may may
also make a new L with IS like they just did with 85mm recently, but the mid-grade instrument needs a helping hand into the 21st century, IMHO.
- A