Canon Photography
400mm f/5.6 - worth it?
Hi,
At the moment I have a Sigma 135-400 for my 400D, and it is a great lens, pretty sharp for ~£200. But I am starting to see limitations, and I would like perhaps a bit more detail in my pictures and for them to snap into focus a bit quicker.
My question then, regards whether or not I would see a marked and noticable improvement in my pictures and the ease of getting them if I were to splash out on an EF 400 f/5.6 L. It is a lot of money for me, and I need to be able to justify it, so could i please have some opinions on this? 
Thanks a lot,
Steve.
Ps. this is the sort of thing I am getting atm.
Personally (having had and used both lenses) I would say that you would notice a marked improvement in both focus speed and image quality if you made the change. To my eyes the images that I get out of the 400 f5.6 are on a par with those that I get from the 500 f4 IS. I honestly think that the 400 f5.6 is the best walkabout birding lens available. Here's my favourite shot that I've taken with the 400 f5.6 - http://www.birdforum.net/gallery/sh...232/ppuser/3294
YES its very close to the 500 f4 just took this with my 400f5.6 L only bird around at the moment just a quick shot . ISO 400 full frame and crop
Rob