After using this telephoto for a few days I think there is no better way to sum up the experience by saying that I would not mind at all that this lens was part of my professional gear. Using it is a joy. Regarding the 500 mm f:4L IS which I usually use the difference in size and weight is very noticeable. Two evenings carrying the camera and telephoto on my shoulder, walking around the wetland, was a very different experience to do it with a 500 mm. The lens is very usable without any tripod, handheld.
And it's not just the weight, it's also the absolute manageability to easily capture birds in flight very quickly.
Purple Swamphen at dawn on Ivars lake.
Canon EOS 5D MkIII at ISO 1600, 400 mm f:4 DO IS II, 1/160 f:4, Hide Photo Logistics
Cormorant in Ivars lake.
Canon EOS 7D MkII at ISO 200, 400 mm f:4 DO IS II + Extender 1.4x-III, 1/80 @ f:8, Hide Photo Logistics
© Oriol Alamany
It is true that we obtain less magnification by using a focal length of 400 mm instead of 500, but not too much. I saw that the 400 makes a perfect tandem with the Canon EOS 7D MkII, as the APS-C sensor provides an additional increase of 1.6x (equivalent focal length 640 mm).
In my experience the strengths of this new telephoto lens are:
- Significant improvement on the resolution and contrast to the original version of 2001. Already excellent from its maximum aperture f:4, that in wildlife photography is the most used. Not necessary to stopping down to enhance the image quality. Absence of chromatic aberration. Fully comparable to the famous Canon L-series telephoto lenses.
- Excellent behavior with the 1.4x and 2x teleconverters, resulting in a 560mm f/5.6 and 800mm f/8 of good quality (or equivalent to 900mm and 1280mm on an APS-C sensor).
- Impeccable and robust construction, of the same style and professional level than L series lenses, sealed all-weather protection.
- Internal, fast and silent ultrasonic AF. Manual focus ring remarkably accurate and pleasant to touch, a pleasure to use.
- Four steps IS, silent and without jumps as older versions.
- Accepts 52 mm filters in a back box, you can even use the specific polarizer.
- Big lenshood.
- Precio elevado, pero algo más comedido que la antigua versión 1 (6198 € contra 6455 €) y menos que un 500 mm (8374 €).
- Expensive, but not so much as the older Version I (€ 6,198 to € 6,455) and less than a 500mm (€ 8,374). (Prices in Spain, January 2015, 21% VAT included).
Common Moorhen in Ivars lake.
Canon EOS 7D MkII at ISO 400, 400 mm f:4 DO IS II, 1/640 f:4, Hide Photo Logistics
© Oriol Alamany
Western Marsh-harrier flying over Ivars lake.
Canon EOS 7D MkII at ISO 800, 400 mm f:4 DO IS II, 1/2500 f:5.6, Hide Photo Logistics
© Oriol Alamany
Woodpigeon at sunset in Ivars lake.
Canon EOS 7D MkII at ISO 400, 400 mm f:4 DO IS II, 1/400 f:8, stalking handheld
© Oriol Alamany
100% crop of previous photography (Click to see at full size)
Canon EOS 7D MkII at ISO 400, 400 mm f:4 DO IS II, 1/400 f:8
© Oriol Alamany
White Stork at the nest, Ivars.
Good performance combined with 1.4X or even 2x teleconverters.
Canon EOS 7D MkII at ISO 200, 400 mm f:4 DO IS II + teleconverter 2x-II (Equivalent focal = 1280 mm), 1/160 f:8
© Oriol Alamany
I am aware that my conclusions may seem almost propagandistic, but this is one of those lenses that I fall in love and that after testing I was very sorry to return. But usually I am quite critical with any of the tools I use in my professional work, so I always find something that is not to my liking. So I'm going to criticize something inherent to all lenses using Fresnel lenses or DO.
THE ONLY DARK SPOT ON THE 400MM DO IS II: THE BRIGHT SPOTS
Little Egrett with backlighting in Llobregat Delta, Catalonia, Spain
Canon EOS 7D MkII at ISO 200, 400 mm f:4 DO IS II + teleconverter 1.4x.III, 1/1000 @ f:5.6
© Oriol Alamany
100% crop of previous photography (here you can see both, the good resolution with the 1.4x, as the peculiar way that sometimes appear the bright spots on the background (Click to see at full size)
Canon EOS 7D MkII at ISO 200, 400 mm f:4 DO IS II + teleconverter 1.4x.III, 1/1000 @ f:5.6
© Oriol Alamany
The inclusion of the DO lens with concentric lines etched in its surface is responsible of the only problem, or should I call "peculiarity", of this unique telephoto. The way that, in certain situations, out of focus bright spots are reflected. The first version of the 400 Do was accused of producing strange halos and glare with out of focus spots shaped like onion rings. That issue seems to have been carefully re-examined in version II to avoid it.
However, in the lens manual we already found a notice about it:
"To further prevent flare caused by light outside of the image striking the DO lens element, the placement of the DO lens has been optimised, by placing it deeper inside the lens and thus preventing stray light causing flare on the DO optic. Together with the third-generation DO lens elements, the high image-quality and reduction in size and weight has been made possible by combining this DO lens with a Ultra-Dispersion (UD) element and a large-diameter ground aspherical lens.
Precautions for shots:
As a feature of diffractive optics, sometimes you may see a flash (flare) colored around the light source depending on the shooting conditions. "


Frames extracted from a video on Canon lenses
In everyday use I have not appreciated any strange reflections or annoying bokeh. Canon seems to have done a thorough job in this regard. There is necessary to force the situation so that things start to twist.
And I did it: I took the lens to the limit photographing specular highlights on backlit water or distant artificial lights.
100% crop 100% crop of backlit glare on water, where you can see the rings produced by the DO lens.
Canon EOS 5D MkIII, 400 mm f:4 DO IS II
© Oriol Alamany
In such cases flare formed by concentric rings may appear, but not always and not in a notorious way. It really depends greatly on the degree of the blur. Generally, when the background is more blurred the rings are less visible or disappear. I show here the worst cases, deliberately seeking to provoke this effect. In most of the pictures I made of subjects with backlit glare is not so obvious, and usually only noticeable increasing the image at 100%.
If this peculiarity is sufficient or not to dismiss this DO telephoto is a decision each photographer need to make: the advantages of this singular optics are several, the potential problems just one.
Distant lights of a town, intentionally blurred to cause glare.
Canon EOS 5D MkIII, 400 mm f:4 DO IS II a f:4
© Oriol Alamany
100% crop of the glare of the previous picture where the concentric rings produced by the DO lens are visible. In most situations blurring a little more or a little less and the rings disappear.
Canon EOS 5D MkIII, 400 mm f:4 DO IS II @ f:4
© Oriol Alamany
ALTERNATIVES TO CANON EF 400MM f/4 DO IS II
White stork nest on a farm, Ivars.
Here you can see the difference of magnification due to the increase in focal length from 400 and 500mm. Slight color differences are due to a change of light between the two shots, not to the lenses.
Canon EOS 5D MkIII a ISO 400, 400 mm f:4 DO IS II y 500 mmm f:4L IS
© Oriol Alamany
100% crop from the previous photo (Click to see at real size).
Canon EOS 5D MkIII a ISO 400, 400 mm f:4 DO IS II y 500 mmm f:4L IS
© Oriol Alamany
100% crop from other pictures taken with the 400mm DO (Mk II) versus 500mm L (Mk I) with teleconverter 2x-II (Click to see at real size).
Canon EOS 5D MkIII a ISO 400, 400 mm f:4 DO IS II + 2x-II and 500 mmm f:4L IS +2x-II
© Oriol Alamany
Canon now offers a lot of alternative telephotos for wildlife photographers. Between 300 and 600mm we have a wide range of focal lengths and apertures to choose. And now, this new EF 400mm f/4 DO IS II joined the crowd.
Overall the 300mm are too short for the frightened wildlife that live in Europe, unless we use it in a camera with an APS-C cropped sensor. Or we accept to use it almost ever with teleconverters. In the latter case the 300mm f/2.8 is a good choice. Other continents may have more confident animals where the 300 will be more adequate.
The 400 and 500mm f:4 are the telephoto lenses where magnification, weight and size combine better. Therefore they are the most commonly used by nature photographers and are what I truly recommend. The less luminous versions f:5.6 are more portable and economic but we have to sacrifice brightness, while the bright 400mm f:2.8 soars a lot in price and weight. I think the 400 or 500 mm f/4 are the perfect middle point.
With the 600mm f:4 we obtain a higher magnification that will be very welcome in Europe, but at a somewhat excessive cost and weight, only suitable for people with economic possibilities and if we do not have to walk a lot.
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CURRENT RANGE OF CANON EF TELEPHOTO LENSES
(The prices are from Spain and including 21% VAT)
300 mm f:4L IS... 1,278 € / 1,190 gr
300 mm f:2.8L IS II... 5,813 € / 2,350 gr + lens hood
400 mm f:5.6L... 1,179 € / 1,250 gr + tripod ring
100-400 mm f:4.5-5.6L IS... 1,498 € / 1,380 gr + lens hood + tripod ring
100-400 mm f:4.5-5.6L IS II... 2,162 € / 1,570gr + lens hood + tripod ring
400 mm f:4 DO IS... 6,455 € /1,940 gr + lens hood
400 mm f:4 DO IS II... 6,198 € / 2,100 gr + lens hood
200-400 mm f:4L IS 1.4x... 10,372 € / 36,20 gr + lens hood
400 mm f:2.8L IS II... 9,249 € / 3,850 gr + lens hood
500 mm f:4L IS II... 8,374 € / 3,190 gr + lens hood
600 mm f:4 L IS II... 10,563 € / 3,990 gr + lens hood
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Tamron and Sigma also offer some telephoto and tele zooms less expensive and generally less brighter than the I do not include here.
Reflections at sunset, Ivars lake
Canon EOS 7D MkII at ISO 800, 400 mm f/4 DO IS II, 1/125 @ f:4
© Oriol Alamany
White Storks and Jackdaws in Ivars
Canon EOS 5D MkIII at ISO 200, 400 mm f:4 DO IS II, 1/640 @ f:5.6
© Oriol Alamany
Cormorants at sunset in Ivars lake
Canon EOS 7D MkII at ISO 200, 400 mm f:4 DO IS II, 1/160 @ f:6.3
© Oriol Alamany
For its focal length, aperture and price this new telephoto Canon EF 400mm f/4 DO IS II is in the medium to high level end. However, in terms of optical performance clearly belongs to the highest class, with excellent resolution, being bright, but also very portable.
This makes it ideal for action photography for both professionals and also prosumers who can afford the € 6,000 price tag.
When deciding to purchase a telephoto lens for wildlife photography you should weigh the pros and cons that I have listed for the 400mm DO II and you can choose if that is your lens or not.
Canon EF 400mm f/4 DO IS II y Canon EOS 7D MkII, a powerful and portable combination for wildlife photography
Links about the Canon EF 400 mm f:4 DO IS II and DO technology
Acknowledgements and disclaimer
I'm not an English person, so please forgive me the linguistic and gramatical mistakes. I have translated the original Spanish review due to the interest of several foreign photographers.
Thanks to Canon Spain for the loan of this lens, even before its commercialization. And to Photo Logistics for letting me use their hide in the lake of Ivars for a real test in the field.
Canon Spain has loan this lens but without asking anything in return. My texts and conclusions are not in any way imposed by the brand. They are my personal observations and I publish it because I think it may be useful to other photographers.
Postscript: The AF-S Nikkor 300 mm f/4E PF ED VR
Already written this article and when it was almost ready to publish it, in January 6, 2015 Nikon announced its AF-S Nikkor 300mm f: 4E PF ED VR, using the same technology of incorporating a fresnel lens to the optical formula, here called PF (Phase Fresnel) instead of DO, getting a telephoto small and lightweight.
Nikon himself recognizes the potential problems in glares due to the technology used and offers a solution to minimize through its Nikon software. It would be nice if Canon incorporate something like this to the DPP software.