1.4/2 teleconverter since firmware update?

[ullmandds]

I have the 1.4 teleconverter and it works pretty well with the 50-140/100-400 lenses.   I had heard prior to the recent firmware update there were issues with the 2x and the 100-400.

 

Can anyone comment on whether this is no longer the case???

[Scott Grant]

First i've ever heard of it.

I used a prototype 2X teleconverter with the 100-400 before the camera was even able to recognize that there was a teleconverter attached almost two years ago.  It functioned properly then.   

[Mike G]

It might be that you are approaching the minimum aperture to have AF work, just a thought!

[dfaye]

I had heard prior to the recent firmware update there were issues with the 2x and the 100-400.

 

Can anyone comment on whether this is no longer the case???

 

I have just tried my 100-400 with 2x teleconverter on my XT2 with the new firmware. It works, though (as you might expect) focus is a bit slow, certainly slower than the 50-140 with 2x converter. I'm afraid I can't comment on whether or not there's a difference in performance after the new XT2 firmware, as I don't normally use the 2x converter on the 100-400 (and after this little experiment I think I'll continue to leave it off, except in exceptional circumstances).

[Lumens]

I have just tried my 100-400 with 2x teleconverter on my XT2 with the new firmware. It works, though (as you might expect) focus is a bit slow, certainly slower than the 50-140 with 2x converter. I'm afraid I can't comment on whether or not there's a difference in performance after the new XT2 firmware, as I don't normally use the 2x converter on the 100-400 (and after this little experiment I think I'll continue to leave it off, except in exceptional circumstances).

 

I must agree, any teleconverter is going to affect Focus Speed and Image Quality.  I have the 1.4x converter that I usually keep in my pocket for those shots I just can't reach and then only for a still shot.  I may pick up the 2x someday as there are many shots just out of reach, but it is not a priority.

[madoy]

I have updated the firmware on my XT4 and can't get a sharp picture with the 50-140 lens with the 2X tele converter