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Studio Tests (Full frame, with 1.4x Extender in place)

Snap the lens's built-in Extender into place, and the test results are still hugely impressive. Sharpness drops slightly, but not so much that you're likely to really notice, vignetting becomes a bit stronger, and a little pincushion distortion creeps into the image. But this is all basically nit-picking.

Sharpness Sharpness is still very high right across the frame at all focal lengths, and only marginally reduced by the addition of the converter.
Chromatic Aberration Chromatic aberration is slightly increased, and there's a little cyan/magenta fringing at the long end of the zoom.
Vignetting Vignetting is slightly higher with the extender in place, with the falloff pattern intruding further towards the centre of the frame. But at only 1.3 stops in the corner, it's not going to be a huge problem.
Distortion There's visible pincushion distortion at all focal lengths with the extender in place. But it's not especially strong and unlikely to have much of a visual impact on real-world images.
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Comments

Total comments: 12
Vmo9

This lens is over-the-top in performance, quality and deliverability! You get what you pay for in this fine lens. If you can't afford one, I highly recommend renting it. When shooting Equestrian, Football, Lacrosse or Soccer (my main focus), you are not confined by the Prime Lens focal length. The f-stop is sufficient for low light, end of day shooting. When shooting Equestrian events, this lens shines and gives the photographer the ability to quickly change focal lengths and capture the action from 200mm to 560mm! This lens has given new life into what I've never been able to accomplish and when comparing to other pros, I've noticed they too are considering (or already have) purchasing or renting one. The 400mm f2.8 is used much less and only for particular reasons. I use a mono pod but have also shot hand held and still captured incredible shots with no signs of camera shake (using a 5D Mark III or 1 DX)!
Without a doubt, this lens is my favorite for shooting sports, wildlife, etc.

0 upvotes
Outback Aus

How does the lens compare to a prime lens say either the 300 or the 600 for sharpness. Some people are saying the pictures are a bit soft. I also use a 70 - 200 2.8 lens. I am getting mixed feed back. It is a lot of money to shell out and not get a sharp image. Thanks

Comment edited 2 times, last edit 10 minutes after posting
0 upvotes
manolo romero

I just recently bought the lens and I'm very happy with the quality.
Its lighter than 400 2.8 sharpness is excellent. The ability to track subjects from a distance as you zoom are superb. That missing range from 200 to 400
is wonderful to have at a twist of a barrel. I can olny think of the shots Ive missed grabbing my 70-200. The ability to frame shots alone are worth a bundle. I let some fellow phtographers try the lens out while shooting a college Lacrosse match and they were equally pleased. The 1.4 ext. also gives you that range that would take an addition lens to cover, especially when shooting with a 1D IV. This lens has become my favorite sports lens in my arsenal.

0 upvotes
Dr Bhaskar Maitra

Very expensive. Out of bounds for 99% of photographers. Canon should reduce its price to realistic levels for increased sales. Only then, it can make a good profit margin. Very poor value for money.
Waiting for a head-on comparison with others....

0 upvotes
oysso

Reduce price? It is a very specialized and costly to develop lens. For the right people this lens is much value for the money. But you have to earn money from your shooting or have loads of money to buy this one.

1 upvote
MarshallG

I would love to see Canon do this with their 200mm f/2.8 L lens -- a compact, sharp lens that 200mm f/2.8 or 400mm f/5.6. That would be fantastic.

4 upvotes
oysso

there is a 100-400 4.5-5.6 for the masses already. That would suit most people on a budget. and you have the 70-200 2.8 which you can turn into a 140-400 5.6 with a 2x teleconverter.

0 upvotes
dbltapp00

I use the 70-200 f2.8 IS II with a 2X a lot. Only a stop slower, for sports that's not a problem. Which is why they have that built-in 1.4X, without which that lens would have been a dud.

0 upvotes
Scorpius1

Amazing lens,all we need now from canon is a top knotch sensor,and maybe they can knock a few hundred grams from the weight of the 1DX successor while they at it..

0 upvotes
Maciejewski

Wonder if they need testers for this lens. I'm available!!!

0 upvotes
Francis Carver

Lens weighs 8 pounds or close to 4 kilos according to the specs. R U sure you're in shape for it? Maybe it will come with its on 2-wheel dolly?

0 upvotes
Scorpius1

This is pretty light compared to the 400mm 2,8 mk1...

1 upvote
Total comments: 12