We have reported recently that an ultra-wide RF-S zoom lens was coming this year, and it looks like Canon will be bringing the RF-S 10-18mm f/4.5-6.3 IS STM to fill that need in the RF-S lineup.
You can see that this lens has a tiny 49mm filter thread. Unfortunately we don't have any other specifications about the lens.
Canon RF-S 10-18mm f/4.5-6.3 IS STM Gallery
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-Brian
Little slower than the EF-S, but probably even sharper and hopefully not that much more expensive.
First picture shows that it needs to be extended like the EF-M lens.
Crop sensor DSLRs and EF-S lenses never struck me as being small enough to make it worth not bringing a full frame camera. It does seem like the RF-S lenses and cameras are getting a lot closer to that, though. At this point you could toss a R50, RF 10-18 and RF 18-150 into a tiny camera bag and have everything from 16mm to 240mm covered in a tiny set-up. Throw in a RF 28mm pancake and you have a decent option when it gets dark, too.
I was hoping for something looking (and spec'ed) a bit more like a "prosumer" lens and going down to maybe 9mm. But this will probably/hopefully be good enough to replace my current EF-S zoom.
Good to know that if I need/want to at some point, I can pair a crop R body with RF-S equivalents of my two most used EF-M lenses.
Maybe, just maybe I'll end with a complete small setup when I don't want to carry my FF equipment.
I personally believe that the size difference (including going from a 67mm to a 49mm filter thread) outweighs such a small difference in maximum aperture. Of course, YMMV.
The iPhone 15 Pro main camera is f/1.78 with a 1/1.28” sensor. That’s equivalent f/3.8 on APS-C, which is ~1/2-stop better than the 18-45 kit lens at the wide end. Of course, the RF 16/2.8 on an R100 is 2/3-stop faster and the combo costs much less than an iPhone 15 Pro. See, anyone can cherry pick.
Of, the sarcasm! Well done, clap yourself! I don't want it to look expensive, I want it to look better than a £5 Chinese toy. Somehow Nikon, Sony, Fuji, Signa all can design good looking APS-C lenses.