Canon to Announce Another “World’s First” at Some Point This Year

The problem Canon had with the rf 135mm, is that the ef version was / is so strong. Sure the new lens is sharper, gains 1/3 stop in brightness and an image stabiliser. However, it’s larger and heavier. Plus is very expensive, you really have to want one to justify the rf version over the ef version. The EF version puts out really great images that are very similar to the rf version. For a lot of users who already have the ef version, there’s not a particularly strong enough reason to upgrade.
I had the EF 135mm f/2 and my RF 135mm f/1.8 is superior in nearly every way: image quality, AF speed, optical IS, ergonomics, build quality, weather sealing, shorter MFD, 1/3 stop faster (37% more light), better bokeh.
Weight is heavier but if you're using the EF-RF adapter(110gm) the difference is only 75gm.
The old lens is still a great lens and good value but depends if you want (and can afford) the best
 
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He meant my weird aversion to half- and third stops aperture in the name of the lens.

A 70-200mm F1.4 or F2 will never happen, but maybe a 70-180mm or something similar. Who knows.

I don´t believe Canon will make another PZ lens with an overlap to the RF 20-50mm, but I could imagine a PZ lens starting at 50mm to couple it with the existing lens. It is basically a question if there is a need for it. Since I don't shoot video at all/ that much, I can't really answer that question nor do I have an opinion about it.
I think the 20-50 is an extremely important lens or, more exactly, an extremely important architecture. It's the first interchangeable lens in a neat package whose focal length is designed to be controlled by the camera body. Previously Canon used a kludgy add-on to do that task. For photographers, this doesn't mean much. For video, this could kill camcorders. Furthermore, it's an L and comparatively cheap.

Regarding overlapping focal lengths, consider the 14/15-35 & 24-70/105, 24-105 & 70-200 and 70-200 & 100-400/500. Canon does this all the time, unlike Sigma that tends to have little or no overlap.
 
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I think the 20-50 is an extremely important lens or, more exactly, an extremely important architecture. It's the first interchangeable lens in a neat package whose focal length is designed to be controlled by the camera body. Previously Canon used a kludgy add-on to do that task. For photographers, this doesn't mean much. For video, this could kill camcorders. Furthermore, it's an L and comparatively cheap.
It'll be interesting to see what happens. I thought camcorders just had kind of a revival. Maybe Canon wants to profit from it instead of killing them of.
Regarding overlapping focal lengths, consider the 14/15-35 & 24-70/105, 24-105 & 70-200 and 70-200 & 100-400/500. Canon does this all the time, unlike Sigma that tends to have little or no overlap.
For the original F2.8 L trinity you're kind of right. There is an overlap between the UWA zoom and the standard zoom, but not for the telezoom. The 24-105mm wasn't really part of trinity, it was more of a "one-lens" set-up kind of thing instead of two lenses. For the EF mount there was and still is the EF 24-70mm F4 L. A lens which was never "brought over" (is that a correct term/ phrase?) to the RF mount. The f4 trinity also only had an overlap with the UWA and standard zoom.

Interestingly, the new f2.8 STM trinity doesn't have an overlap between the UWA zoom (16-28mm) and standard zoom (28-70mm) and believe it won´t have an overlap with the telezoom. Concerning the f2 zooms, they are harder to design and every focal length saved will save significantly more weight. Therefore, I hope (and actually believe) a F2 trinity won't have any overlap.

Of course, Sony went a different way and according to an article it was a design choice because research showed that there are more people willing to buy a 50-150mm F2 rather than two f2 zooms. This could happen to Canon too, but they usually do things differently anyway. Also, I believe they want to differentiate from Sonys offering. Beating that lens is pretty hard, but coming up with a different lens that can be market as "worlds first" is a pretty good answer. Therefore, I am hoping for a world´s first 70-180mm F2.
 
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It'll be interesting to see what happens. I thought camcorders just had kind of a revival. Maybe Canon wants to profit from it instead of killing them of.

For the original F2.8 L trinity you're kind of right. There is an overlap between the UWA zoom and the standard zoom, but not for the telezoom. The 24-105mm wasn't really part of trinity, it was more of a "one-lens" set-up kind of thing instead of two lenses. For the EF mount there was and still is the EF 24-70mm F4 L. A lens which was never "brought over" (is that a correct term/ phrase?) to the RF mount. The f4 trinity also only had an overlap with the UWA and standard zoom.

Interestingly, the new f2.8 STM trinity doesn't have an overlap between the UWA zoom (16-28mm) and standard zoom (28-70mm) and believe it won´t have an overlap with the telezoom. Concerning the f2 zooms, they are harder to design and every focal length saved will save significantly more weight. Therefore, I hope (and actually believe) a F2 trinity won't have any overlap.

Of course, Sony went a different way and according to an article it was a design choice because research showed that there are more people willing to buy a 50-150mm F2 rather than two f2 zooms. This could happen to Canon too, but they usually do things differently anyway. Also, I believe they want to differentiate from Sonys offering. Beating that lens is pretty hard, but coming up with a different lens that can be market as "worlds first" is a pretty good answer. Therefore, I am hoping for a world´s first 70-180mm F2.
Oh wow... a 70-180 f/2 would be a world's first on any mount! I wonder what size and weight it would have to be. Seems like a fantastic idea and I think would help solidify the Canon market and not so tempting to try Sony with its 50-150 f/2. And as you say, this would not have overlap since Sony does have a 28-70 f/2 so it overlaps the 50-150 f/2 by 20mm. But the Sony 28-70 f/2 is 36% lighter than Canon's version so that's a fair bit lighter (512 grams or 1.13 pounds). For anybody shooting for hours at a time that is a lot lighter to carry.
 
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