There will obviously be more RF-S lenses coming coming this year as well as next year. Today we see a patent for a couple of RF-S optical formulas. One of these optical formulas will likely be close to a future product by the looks of the designs.
The concept here seems to be a combination of the EF-S 17-55 f/2.8 USM and the EF-S 15-85 f/3.5-5.6 IS USM. We could see the RF-S 15-85mm f/2.8-4 IS USM being the likeliest product to come from these optical formulas.
Canon RF-S 15-70mm f/4
- Focal length:15.45-67.94
- F-number: 4.12
- Half angle of view: 41.27-10.60
- Height: 12.66-13.66
- Overall length: 100.14-120.23
- Back Focus: 10.46-12.37
Canon RF-S 15-70mm f/2.8-4
- Focal length:15.45-68.04
- F-number: 2.8-4.12
- Half angle of view: 41.38-10.61
- Height: 12.66-13.66
- Overall length: 100.32-118.71
- Back Focus: 10.62-15.59
Canon RF-S 15-85mm f/2.8-4
- Focal length:15.45-83.77
- F-number: 2.88-5.80
- Half angle of view: 41.36-8.71
- Height: 12.66-13.66
- Overall length: 101.54-133.85
- Back Focus: 12.12-16.91
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Decent aperture and a decent focal range.
Still my favourite of the listed though, and would probably replace the EF-S 15-85mm on my R7.
Good eye.
RF-S 15-85mm f/2.8-5.6 makes far more sense to me than RF-S 15-85mm f/2.8-4.
I attached the US patent application which is easier to read.
Cool. How do you find that?
(PS. People reading comments directly from article can't see attached. Open comment thread in forum to see it: https://www.canonrumors.com/forum/t...s-15-70mm-f-4-and-rf-s-15-85mm-f-2-8-4.42290/)
To search for all Canon patents and patent applications, type for example canon.aanm. in the input field on the upper left of the tool (the "." at the end is important). There might be better search terms if you are looking for lenses specifically, as the above will give you all patents filed by Canon. On the other hand, you also see filings about accessories, autofocus, IBIS, mechanical construction of camera bodies,... which can also be interesting. Patent applications are published on Thursdays.
The leftmost button above the viewer switches to a pdf-like view, the document can be saved with the print button next to it.
Note that the tool might block you if you browse through a large number of filings (at least it seems to do so in my case) by showing an "image not yet available" message. Usually after waiting a couple of minutes and reloading the tool you should be able to continue searching.
I wasn't aware that attachments are not displayed, is there a better way to upload them?
A full frame 15-70mm would have been something to really get excited about!
Nice options for the R7 though, so hopefully these will make it to production in the near future.
Not to rain on the parade, but the RF 100-500 patents topped out at f/6.3, and the RF 100-400 patent was f/5-7.1. The actual lenses are slower. I suspect if we see an RF-S 15-85, it will be f/3.5-6.3 (or 7.1).
I also think it will be a cold day in Hades before we see a constant f/4 zoom for RF-S.
Now we have "content creators", probably the most meaningless description of all time. Uggghhh!
2. More lightweight (and better balanced for reverse handholding and/or for use on small gimbals);
3. More forgiving zoom range when shooting videos unprepared.
2. The EF-M 15-45 weighs exactly the same 130g as the RF-S 18-45. The EF-S 18-55 was heavier, of course, but not a good comparator given the flange difference. The RF-S 18-150 is 10g heavier than the EF-M 18-150 (a difference of 3%). So...no.
3. If someone starts 'creating content' without checking something obvious as framing of the image, the content is likely to be crap anyway. So...no.
The only benefit of the more restricted zoom range is to Canon's bottom line. They're charging more for a less capable kit lens, and that means more profit. It's a perfectly reasonable choice from their perspective, but can you honestly say it benefits anyone buying the lens?
I don't think that anyone would object to that, but that's not the point.
Looks like non sequitur.
Hardly anyone expects them to create award-winning content with Canon's kit lenses. Still, their crappy content will look better to them if they don't (accidentially, but highly likely) use 24mm for selfie videos.
I'd say it's the same as with the lack of the filter rotation wondow on the hood of the RF 100-300L. It's not the solution I would personally prefer, but I'm not the target audience of this lens.