Anyone using a Canon 100-400 + 1.4 TC III on 800D?

cdmazoff wrote:

WilbaW wrote:

cdmazoff wrote:

Hi. It's supposed to allow 27 autofocus points at f8.. Has anyone tried it? I need something "longer" than my Tamron 18-400.. and I'm interested in Canon lenses

I can't comment on the 800D, though it seems to have basically the same AF system as the 80D, so it should be very good if they haven't crippled it in some way.

The 100-400 II and the 1.4 III is a great combination with one important caveat - TCs often need a lot of microadjustment to give accurate focus. For example, on my 7DII the naked lens needs -4 at the Wide end and 0 at the Tele end, whereas the combination needs W 0 and T +9. +9 makes a huge difference at 560mm. You might get lucky but my advice is to not use TCs on cameras that don't have AF MA.

The knee-jerk response to any question about TCs is that they degrade image quality. You will see that if you compare images at 100% but that's not why you use a TC. I have proven that good quality modern gear like the Canon 1.4 III gives better image quality than cropping to the same framing, and I'm convinced that the perception of loss of sharpness and contrast is actually more about loss of AF accuracy than optical degradation.

Thanks a lot.. Yes, I've noticed that the 800D does NOT have AF MA!!!! Big Boo!!!...

Every DSLR should have it.

I've got to find a way to get 600 (not counting the crop factor).. The Tamron is just too big and I think the Canon quality is much better..

If the rumoured EF 200-600mm f/4.5-6.5 ever comes true...

I guess I will just wait and practice being more invisible to the birds!!

There's a lot to be said for that, all the best bird shooters put some effort into it.