Patent: Canon EF 28-560mm f/2.8-5.6
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TeT said:
If the 24-105L is a mess at 24mm, imagine what 24-560 would be!
But I hear you. I'd be changing out a 28-something zoom so much more often than a 24-something zoom. Just a few millimeters, but it's tremendously useful. One has to wonder if that trend will continue... 20-70mm f/2.8L, anyone?
- A
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It was a rhetorical questionahsanford said:unfocused said:
J-nord, again, refer to my prior meme with Obi-Wan. The under-$2k long supertele we expect to see will be in the vein of the Nikon 200-500 f/5.6 VR for the amateur wildlife/birding crowd. Many threads have beaten up how Canon might do this, and the math and the money just gets thorny:
- Zooming up to 600mm coupled with Canon's insistence on f/5.6 at the slowest (for the EF mount) kind of blows up the low-cost + front-filterable option. 600 / 5.6 = a very large entrance pupil.
- Only going up to 500mm like Nikon did (wise for cost + filterability) may be passed over by the market for the three Tamron and Sigma 150-600mm options.
- Given the cost of the 100-400L II, it's hard to see a 200-500 f/5.6L IS coming in under $2k, and I'm not convinced Canon will pull the L moniker off of the product and go plasticky/STM to keep it cheap. So I see more of a $3k lens than a $2k lens here. (I'm still waiting for proper reviews of the 200-500 Nikon to see what corners the designers cut to get that down to $1,400 -- at present, it seems like they are practically giving the lens away at cost to land-grab amateur birders all in a tizzy about the D500
).
- A
It seems highly unlikely they'd make a FF lens with this spec regardless of price or performance.p.s. I posted before your meme 8)
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Well, this is going to totally suck. I'll only need one lens/body on the black rapid. I'll need a 20 pound block of lead attached to the other strap for balance. Need to start the weight training program again.
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RGF said:
This lens would be F2.8 at what focal length - not 300? So does it have to be the size of a 300 2.8?
Jack
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Besisika said:
Snipped quotes for brevity.
I too was buy one of these - if the IQ was good enough across the whole range.
I would expect people to be intimidated if you're pointing a Canon at them with the intention of shooting. :
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j-nord said:Talk about zoom ratio
Is this the super zoom we've been hearing about? Are they really going to produce competitive IQ with that zoom ratio for under $2k?
Under $2K? Why nawwwww.
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CanonFanBoy said:KeithBreazeal said:
You could carry it low and directly in the front as subliminal suggestion.
LOL! Is that a Canon or are you happy to see me?
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j-nord said:Talk about zoom ratio
Is this the super zoom we've been hearing about? Are they really going to produce competitive IQ with that zoom ratio for under $2k4K. 5k?
There fixed that for you.
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GMCPhotographics
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The objective lens is going to be quite large, minimum 96mm in diameter. So it's unlikely to be a cheap lens. The other thing that struck me was....why the odd focal length...560mm??? Where did that come from?
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GMCPhotographics said:
400mm with a 1.4 extender is 560mm, not sure if that has any effect, but it's a prominently used focal length for that reason. If this doesn't have a built in extender, which it looks like it doesn't have one, I'm guessing it was a compromise for size reasons. 560 / 5.6 = 100, might have to do with the objective lens diameter, but I'm not too well versed in lens design.
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Interestingly all four working examples describe the same type of lens.
The aberration graphs are not as abysmal as one might expect. At 300 mm in total length this is fairly comparable to the other super telephoto zooms already on the market.
There is also at least a superficial resemblance to the Tamron 16-300 mm APSC lens. This lens may be a stepping stone or derivative design of a Canon cropped superzoom.
The aberration graphs are not as abysmal as one might expect. At 300 mm in total length this is fairly comparable to the other super telephoto zooms already on the market.
There is also at least a superficial resemblance to the Tamron 16-300 mm APSC lens. This lens may be a stepping stone or derivative design of a Canon cropped superzoom.
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GMCPhotographics said:
560mm is a number Egami made up. The patent specifies 540mm
Check my math, but in WE1, the first element has a thickness of 1.90366 mm with a radius of curvature of 230.39mm and 114.55mm; this would put the diameter at around 60mm.
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