Reviews and Problems with Canon EF 800mm f/5.6L IS USM
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RK, B&H Photo
7 February 2014
Excerpt: This lens is very well made, like other L-series Canons... Even with extender 1.4x III, the sharpness and quality is remarkable. Yet to find a light-but-stable stand to carry this lens and camera body around...
Conclusion: I got this lens as a gift from my mother. It is the best gift ever. It is very heavy and you need a tripod to use with it. I tried using a mono-pod, but had better results/luck on a tripod. I am not sure Arnold Schwarzenegger could hand-hold this one for long, even in his youth! There is a learning curve and some adjusting to get used to it, but it is a great lens for wildlife. I was lucky and got this as a gift, but if you have the $$$, it is a great lens.
Conclusion: Resolution has always been my highest priority and this lens certainly is the best. The auto-focus features are superb. After using the 600mm f/4 L lens for years trading it in for the 800 was the best trade I've ever made. It is lighter, a longer focal length and the stabilizing features are excellent. Would recommend a gimbal tripod head, with one the system can be manipulated with ease.
Pros: Fast auto-focus, Superior build quality, Super-sharp images
Excerpt: I have owned this lens for about three months now, and all I can say that NO other lens will even comes close to beating the picture quality of this lens. I have tried the new 600mm f4 ii of canon. It is a fantastic lens, but in order to get the same focal length you need to use 1.4x TC (slightly larger at 840mm). The picture quality is not comparable to 800mm. I have seen so many review on internet that the new 600mm would make the 800mm obsolete, but I beg to differ.
Summary: This is absolutely the best super telephoto lens that I have ever used. I own 300mm, 400mm version II from Canon. I also tried the new 600mm USM II. It was an excellent lens, but color rendition and quality of images from this lens even beats the new 600mm. If you need the focal length, then this lens has NO rivals.
Excerpt: I have only had this lens for 10 days and I am amazed at how this lens tracks birds so well. It was not hard to find the birds through the lens and then keep them in view, shots were very sharp. I also took pictures of whales from quite a ways away and the pictures were so good I didn't even have to fix them in Lightroom. Even with the wind blowing about 25 MPH this lens was still tack sharp while on my tripod.
Pros: Consistent Output, Durable, Easily Interchangeable, Fast / accurate auto-focus, Nice Bokeh, Rugged, Strong Construction