bass_junkie83
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With so many people saying that after seeing the 60D, they are more likely to splash out for the more expensive 7D, it seems canon are not all that daft. 
Not sure I totally agree here, depends on what you call huge? and why would it not perform as good being f4?It would be huge, weigh a lot more, cost a lot more, and would not perform as well.
Finally someone is actually comparing the new prices with the old ones... All of these lenses will be much more affordable in 6 months when the initial hype is gone and the prices go down..
Now, regarding 70-300.. I would say it is a nice addition. Within this range, only lenses without any drawbacks are the 70-200Ls and they cost a lot (other than 70-200F4 non-IS).
55-250 is cheap but very bad build quality
old 70-300 has a better built but not a proper USM and IQ suffers beyond 200mm..
so if the price of the new 70-300mm falls somewhere between IS and non-IS 70-200mm F4, then it would be great buy (depending on the IQ of course).
Not sure I totally agree here, depends on what you call huge? and why would it not perform as good being f4?
But the 100-300f4 sigma is lighter than the canon 70-200f2.8Lis and very sharp, but there again canon must have a market for it and im sure it will sell well, great for traveling light I guess,It would be quite a bit bigger and heavier than the 70-200L 2.8 - that's just physics, as the glass area would have to double. So on that basis, using the 70-200L 2.8 as a guide, at least 50% heavier.
And it would not perform as well because making faster lenses perform well is very difficult. So either it would not be as good, or it would need even more glass in it, or something super-special like fluorite which would shoot the price up.
You have to compromise. I'm sure Canon would love to make it f/4 throughout, or f/2.8 would be even better, and then run it out to 400mm. You might not like where Canon have drawn the line, but they will have drawn it there after considerating absolutely every option, and pushing their technology to the max on every aspect. The price is surely high enough as it is.
But the 100-300f4 sigma is lighter than the canon 70-200f2.8Lis and very sharp, but there again canon must have a market for it and im sure it will sell well, great for traveling light I guess,
You saw the RRP right ? £1599 street price after 6 months might hit a grand ?
The fisheye.......
Full frame - pure whacky I would guess !
A more traditional 'fisheye' view on a crop but something (not ure if this is normal) I thought was a good feature....
A zoom-lock mechanism on the lens body allows the range to be limited to the focal length - C and H markings can be found next to the zoom operation ring, indicating the wide-angle zoom position where vignette-free shooting is possible with either sensor
I think that unless you fancy the extenders option, the current lenses are pretty damn good, and cheaper. But for pros looking to ease their load of maybe a 300/2.8 and a 600/4, if you can maybe cover that with just one lens and an extender, you're laughing* all the way to the bank.
*until the new 500 and 600s appear![]()

Was pondering on the 70-300 'odd-ball' and just wondered if Canon might be working on a FF rangefinder type body..., would seem like a rather nice travel combo... I can but dream...
It's a huge thing! Long, heavy, expensive, doesn't have IS and I'll bet nowhere near as good optically as this new Canon will be.
It's unfair to compare them really, but if that particular blend of optical package was really the one folks want, why are Sigma not selling tons of them? It's even disappeared from the Sigma UK website listing (no idea why).
I wish there was a new 100-400. Everytime I think about buying it I stop when I remember how old it is...
They'll be replacing it because I bought it last week.
And it is pretty great, it has to be said. Obviously IS would be nice, but I don't think it was invented, or at least in use, when the lens first came out (2001) which would have made it a bit tricksy. And the constant f4 is...nice. It's good to have it there, but I don't think I'd miss it - it was the sharpness for the price that sold the lens to me.
Ill hold out until the 100-400 replacement I think, im hoping sigma will come out with a 100-400, (or similar) f4 with OS, id have there 100-300 now if it was OS.
IS has been around since before 2001.
IS has been around since 1995 I think.IS has been around since before 2001.
Kind of like we did to Messerschmidt's during WW2...rip them apart and figure out how they did it.
I reckon so, once they've got hold of the Canon 70-300L they can rip it apart and reverse-engineer a 100-400 with OS.
When I had a siggy 70-200 I went to Welwyn to see Sigma's repair centre and that's exactly what they told me they do. Kind of like we did to Messerschmidt's during WW2...rip them apart and figure out how they did it.
IS has been around since 1995 I think.
1997, Canon 300L 4 IS. I think.
Nope, 1995 actually, at least on Canon lenses.
(The 75-300 IS)
Gonna have to google that now!Correct! and canon were the first company to use it in a SLR lens.Nope, 1995 actually, at least on Canon lenses.
(The 75-300 IS)
* With the possible exception of fluorite crystal which is a Canon exclusive I think - wonderful stuff but very expensive. It is 'grown' in a special factory and is mildly radioactive (a problem for factory workers, not users) and degrades in the atmosphere so has to sit in a hermetically sealed unit. If you see fluorite in the lens spec, it is going to be damn good, and also top price (eg new 70-200L 2.8 Mk2, 300L 2.8, 400L 2.8 and the longer primes).
Have you seen the WEX page on the 400mm f/2.8?
£11,499 - and they recommend a 52mm Hoya pro 1 digital filter to go with it..... [now, I don't know about you, but if I'd splurged £11499 on the best MTF's ever, would you drop in a UV filter, no matter how good?]
£1500Anyone seen a price for the fisheye zoom?
Anyone seen a price for the fisheye zoom?
Just confirmed that the 70-300 does indeed extend when zoomed to 300mm. It grows by about 35% - about 2in - as you would expect.
Which just makes me wonder even more why anyone would choose this over a 70-200 f/4 IS & 1.4x
I think you will find all Canon tele's already have a Canon 52mm. UV filter in them . at least mine have except when I occasionally replace it with a Pol. filter.