Fast Full Frame Unique Zoom Lenses

Richard-CN

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The Japan Patent Office (2026-033938) has recently published a Canon patent application that shows off some very interesting optical designs. I had previously discussed these as quarter-wave optical designs, just because I have no idea what else to call them. How these lenses work is that there are transmissive surfaces that bounce the light back […]

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Hi!

This 'reflecting forth and back' sounds a little bit like interference, but there the distance between the two reflecting surfaces is VERY small.
Concerning all the patent applications: Is it possible that Canon want's to distract a little bit from the potential new lenses, so that they created some 'nonsense' patents to 'hide' the potential new lenses in this larger amount of patents?
 
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Concerning all the patent applications: Is it possible that Canon want's to distract a little bit from the potential new lenses, so that they created some 'nonsense' patents to 'hide' the potential new lenses in this larger amount of patents?
Canon files thousands of patent applications per year, they have been in the top ten companies in terms of that for over four decades. They release <10 lenses per year. So very unlikely to be a ‘distraction’, as you suggest.

Most patents are not necessarily intended to become products directly, and in many cases some claim(s) in a patent have broad applicability, e.g., a new lens coating included in a patent may be used on many lenses.
 
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Made of optical glass or optical plastics like the one on the RF 28mm f/2,8?
I wouldn’t like to say, but what I can say is that the optical performance of the RF 28/2.8 is really quite impressive, with superb clarity. So called ‘micro contrast’ doesn’t seem to suffer from the resin elements, there’s not a lot not to like.
 
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Why can’t we have some mid range tele for crop cameras. Keep doing more and more wide lenses is not going to make more money.
Sigh. Because physics. Wide and standard lens designs are limited by the image circle diameter, telephoto designs are not. There is no point in a telephoto lens ‘for crop cameras’ since such a lens would work fine on FF. That’s why there are no such lenses.

Look at the Oly/OM 150-400mm, for example. It’s for m4/3 (2x crop) but it’s about the same size as the Canon 100-500 (and if OM made a FF camera, the lens would work on it).

As for wide lenses not making money, I really don’t get why some people seem to think they know better than Canon what lenses people will buy. I mean, Canon has led the ILC market for over two decades and dominates it today…but you know more about what lenses they need to make? LOL. You get to decide what lenses you want to buy, but Canon doesn’t care what you personally want.
 
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...Wide and standard lens designs are limited by the image circle diameter, telephoto designs are not...
On the schematic of the 24-45, the transmission path of the edge rays do not go through the entire width of the central elements. Is this the constraint of the image circle at the focus plane?

I can intuitively visualize in a telephoto lens with a narrower angle-of-view the edge transmission path taking up more of the width of the central elements.
 
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...

As for wide lenses not making money, I really don’t get why some people seem to think they know better than Canon what lenses people will buy. I mean, Canon has led the ILC market for over two decades and dominates it today…but you know more about what lenses they need to make? LOL. You get to decide what lenses you want to buy, but Canon doesn’t care what you personally want.
Well, I'm not the author of that comment but come on: Each of us has HIS preferred lenses (and of course Canon knows best which lenses will give them the most profit). And we are most interested to get the lenses we are dreaming of. Me too! :)
 
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On the schematic of the 24-45, the transmission path of the edge rays do not go through the entire width of the central elements. Is this the constraint of the image circle at the focus plane?

I can intuitively visualize in a telephoto lens with a narrower angle-of-view the edge transmission path taking up more of the width of the central elements.
The ray diagram is going to 'stop' at the edges of the diagrammatic 'sensor' by convention, even though that's technically the image plane and is thus a 2D surface.
 
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Well, I'm not the author of that comment but come on: Each of us has HIS preferred lenses (and of course Canon knows best which lenses will give them the most profit). And we are most interested to get the lenses we are dreaming of. Me too! :)
Of course...we can all wish for lenses and hope that Canon makes them. But there's a significant difference between hoping for a lens and claiming that Canon not making the lens one hopes for will have negative consequences for their business. The former is quite reasonable, the latter (which is what @swingman did) is asinine.
 
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Well, Sony honestly knocked it two out of the park with their F2 zooms, maybe Canon feels "pushed/ poised" or whatever to top that with a f1.4 zoom.

Honestly, I don't think a lens like the a 24-45mm (or 50mm?) f1.4 is likely to happen. I´d love to see it, but I don´t believe in it. Plus, what would a lens like that cost? Taking into account, the prices of three vcm primes (24/ 35/50) or maybe four once Canon fills that glaring hole (28mm), I´d guess the price would be north of 4k € at least.
 
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