Quote Originally Posted by Jayson View Post
Here are some M with 2 1.4x TC and adapter paired with a 300mm f/4L IS. Taken at f/11, ISO 1600. M did a little shot gun initially when trying to focus, but locked on correctly after a second or two. I used my 580 ex II flash to light the birds since it was a rainy day. That might have been the reason the camera was hunting due to the assist light being blocked by the larger lens.
So let me see if I read this correctly. Attached to the "M" was not one but two 1.4 TCs then a 300 F/4. I LOVE IT. so 1.4x1.4x300x1.6(crop factor) = 940? FF equivalent and f4 should be f5.6 to f8.0? (could be wrong here) and the "mighty mouse" M still focused at all!!! and lastly you shot the pic 1 stop down from max aperture. LOVE IT!!!

So did you hand hold these . I have to admit I hadn't thought of stacking TCs.

I think this is cool.

Mike