Canon marketing has called the Canon EF 400mm f/4 DO IS II USM Lens "The Portable Super Telephoto Lens". The Canon EF 400mm f/4 DO IS II USM Lens packages impressive image quality in an ultralight and ultra-small package with autofocus and image stabilization systems that are among the best...

Specification A professional-grade telephoto lens, which sports a moderately fast maximum aperture of f/4, image stabilisation, silent focusing with full-time manual focus override and a relatively compact design, thanks to the use of Diffractive Optics.

The Canon EF 400mm Æ’/4 DO IS II USM is a fantastic, professional-level supertelephoto lens. As a significant upgrade optically compared to the original version, the 400mm DO II is an even more attractive option over the heavy, expensive 400mm Æ’/2.8L IS II.

Put simply, the Canon EF 400mm f4 DO IS II USM is an outstanding super telephoto lens. Its use of cutting edge optical technology provides superb image quality with minimal light fall-off, no noticeable distortion and very high corner to corner sharpness.

Despite the price, this lens certainly makes an interesting prospect for those who find the size and weight of a traditional 400mm prime simply too much to be carrying around. The relatively compact dimensions make this lens fairly easy to hand-hold, especially when compared to this lens' larger and...

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  Outstanding sharpness from maximum aperture, Low CA, Low distortion, Relatively compact, Excellent build quality, Effective image stabiliser

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  Price puts this lens beyond the reach of many

Canon 400mm f/4 DO MK II............... versus Canon 100-400mm MK II , Tamron 150-600mm and Sigma 150-600mm Sport,... and the optically perfect "Tony Northrup extender"...................... my first impressions After working my way thru approx.

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  Portability, and handling without and with extenders

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  Price

My company rented this lens for me for the Breeders' Cup. This lens hit it out of the ball park. Light weight, no distortion, amazing photos! Plan to put this on my wish list

Just got this lens. Replacing my 100-400 zoom which was always used at 400mm and slightly soft. So far, I am impressed with quiet focus and sharpness and allows more light than the old zoom. Think I will enjoy this lens.

Une pure merveille que j utilisé tous les jours

My company specializes in high altitude photography we recently replaced our legacy lenses with this masterpiece of optical engineering.If you are hand holding a lens longer than 200mm this is the only lens you will ever need. Its compact DO design is ideal for action photography.

Build quality of the l series.<br /><br />If you're looking for a telephoto lens to lug around all day long this is the best option and coupled to the teleconverters the results are excellent too handholdable 800mm f8.

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  Consistent Output, Durable, Easily Interchangeable, Lightweight, Quick Focus, Rugged, Sharp Focus, Strong Construction

Fa lavorare bene anche la 7d2 il che è tutto dire

I am strictly a wildlife shooter. My hobby in retirement. I can say SLRGear's review of this lens is spot on. Shooting wildlife I use the 300 II and 500 II lenses. Both are the pentacle of optical quality in there classes IMO. The 400 DO II lens while very good, and the build quality is top notch.

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  Light weight, Extremely well made, Fantastic IS, Good optics

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  Not tack sharp

I bought this lens because I have always wanted a DO lens but the first version of the 400mm DO was a little disappointing - based on online reviews. So when the Mk II was annnounced towards the end of 2014, I eagerly waited for some positive reviews.

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  Light weight, Good Optical Performance, Improved IS

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  Could be cheaper!

This lens intrigued me ever since the first version came out, but I resisted the urge due to the cost and the fact the IQ was considerably lower than other super telephotos. I've used the 300f2.8 version II, and it was a nail biter when I decided to sell it for this lens.

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  Size, weight, optical quality.

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  Price