Yea Canon put WR on the new 28-70mm f/2.8 STM (and 16-28mm) on the rear mount, and on the rings of the barrel, but NOT on the switches.......which I do not understand at all, either make it WR or don't! Rubber gaskets around the 2 switches might have added $2 to the cost.
I shot the EF 24-70mm f/2.8 for 10 years, and now have been shooting the RF 24-70mm f/2.8 for about 5 years.
A few months ago I tested out the 28-70mm side by side with my lens for a day, as the size and weight reduction was too large to ignore. There were a lot of similarities and differences, but in the end I stayed with my 24-70mm.
One reason being that my 24-70 is fully Weather-Resistant, and the 28-70mm ''kind of'' weather-resistant.
Also the filter threads on the 24-70 are metal, and on the 28-70 stm they are plastic, so if you are someone who screws filter on and off frequently, there is the potential for stripping the filter threads on the lens over time with the 2870.
I surpassingly found central sharpness on both lenses at pretty much every aperture, and every focal length to be indistinguishable! They looked identical to me at 100% on my computer.......but the corners on the 2470 L were definitely much sharper, clearer, and had more detail than the 2870.
And if your shooting for subject separation, the Bokeh is much smoother on the 2470, side by side the 2870 stm definitely had ''busier' bokeh, especially in trees and foliage.
But when you factor in the weight reduction, the size difference, and cost difference, the 2870mm is a great lens!
If I did not already own the 2470, I would actually 100% buy the 2870, but if I sold my 2470 now and bought the 2870 (plus I would have to buy the lens hood since it does not come with one, plus I would have to buy a new filter since it's a different size), I would pocket very little extra cash after the swap, and something just didn't feel right about trading my roughly $2000 lens for a $1000 basically straight up.
Feb 15, 2026 at 08:24 PM
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