For whatever reason the manufacturers are only offering few "affordable" tele prime lenses today. The Canon EF 400mm f/5.6 USM L is the last of its species (slow speed 400mm) that it marketed today - there used to be a Pentax FA* 400mm f/5.6 and a Minolta AF 400mm f/4.5 APO but these are history...

My previous 100-400mm L IS USM lens seemed to produce shots which lacked sharpness, particularly noticeable in reduced fine feather detail when photographing birds. This 400mm f5.6 prime lens is much crisper and gives much improved results.

Lightweight; Quick Focus; Sharp Focus; Strong Construction

No Image Stabilisation

Innan jag köpte den här gluggen så läste jag allt som fanns istort sett och alla berömde den. Det jag läste var sant. Jag har inte en gång varit missnöjd med den utan allt är bara kanon. Funderade länge på en 100-400 L och lyckades låna en för en stund.

Skärpan; lätt och smidigt; oerhört snabb autofokus

inga som jag märkt

This lens is light enough to carry comfortably in its case on a belt and/or with the shoulder strap and cheap enough for some of us to buy without a mortgage on the house. This is possible because it does not have IS and it is limited to an aperture of F 5.6, which are its cons.

Consistent Output; Durable; Easily Interchangeable; Fast / accurate auto-focus; Good quality case; Integrated lens hood; Lightweight; Nice Bokeh; Rugged; Strong Construction

No Image Stabilization; Poor in Low Light

Pros: I have had numerous favorable photography gear purchases from buydig.com and my new Canon 400mm 5.6L is no exception. It's a sharp, telephoto lens with a wonderful bokeh not to mention it is rather light weight. So it's easy to carry by hand vs. requiring a tripod.

This lens is one of the great values in photography. It is super sharp and does a great job of bringing the action to you. While it does not have image stabilization, it is light enough to hand hold and with some practice you can get great shots.

Image quality; weight; build quality

No image stabilization; maximum aperture f/5.6

I've only used it for a couple of days but it seems to be in just as good a condition as advertised. No scratches, no visible damage. Works great. Good stuff. Fun fact. I chose the seller with the best lens picture.

I am disappointed this is not the unit I thought I was buying. It was the only "L" USM 400mm f/5.6 CANON lens so silly me as I have ended up without image stabiliser & the item I wanted. I now note the "EF" may need to be "IS". Had I made a retail purchase I would have seen this

Canon classifies the Canon EF 400mm f/5.6L USM Lens as a "Super Telephoto" lens. It is super in image and build quality , but is not super in size . The 400 f/5.6 is relatively light in weight but very solidly built . It feels long and narrow in your hand - and feels even lighter than it is.

Never liked the EF 300 MM F4.0, the EF 100-400 mm was already better. But the 400 MM F5.6L surprised me. The IQ is very very good. For a short time I have had the EF 400 F2.8 ISL. The IQ of that lens is out of this world, as is the weight. You need a truck to get where you want to take your photo's.

Light; build-in hood; very nice IQ; nice Bokeh; cheap; 800 euro for a second hand

No IS; F5.6 with extenders makes it F8.0