Canon EF 600mm DO BR prototype at EXPO 2015
- Thread starter Meatcurry
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Any idea as to aperture and weight? Is fluoride still needed if br is used?
Please someone at show check it out....
And tell us about it.
Please someone at show check it out....
And tell us about it.
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Somehow, I doubt that this is the new "affordable telephoto" rumoured to be added to the Canon lineup.....
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applecider said:
Based on the size in comparison to the body, then it's gonna make all us current 500mm and 600mm owners very jealous unless it comes in at a (ridiculous for Canon) price. I would guess about US14K.
It looks comparable in size with the 300mm f/2,8 which is amazing
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Do diffractive optics also alter the diamater needs to achieve an f/4 or f2.8 lens? I mean, If they release those "compact" 600/4 and 500/4 in DO, does that mean they can do a 600/2.8 and 500/2.8 also with DO but in the current form factor of the 600-500/4?
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fegari said:
The largest element diameter is the focal length divided by the F-stop... Diffractive Optics lenses do not change this.... a 600F2.8DO lens would need a 214mm first element and that makes for a huge! lens....
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vscd said:
Not Frontelement, but an 214mm aperture. By the way... it seems the green ring is gone to red with BR Elements
That lens with the red ring looks production ready, why show that and the prototype version? Are we sure that's the 600 DO, damm CanonRumours, why aren't you there?
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Those are clearly two different lenses. One looks like an early proof of concept and the other looks like a product. Are we sure both are the same focal length?
And I know length is huge for packing/travel, but that a looks something like a french horn spout as far as diameter goes. What the hell kind of bag/case would you transport that in?
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And I know length is huge for packing/travel, but that a looks something like a french horn spout as far as diameter goes. What the hell kind of bag/case would you transport that in?
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The one with the red ring would be a production mockup almost certainly without the correct internals, the rougher looking version would be a 'working' prototype, it would probably have the right glass elements in the right places to provide proof of concept, as the prototype testing progressed more functionality would be expected, AF, IS etc etc. Then the two would be combined, any conflicts sorted out and pre production models made. Doing all this is a long and costly business, Canon refuse to innovate :
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