Just got a new 2x converter, tried it with my 135L. Holy cow, I'm very impressed. I have the sharpness in DPP set at 3 for RAW
Full size
Not bad huh? I expected worse for some reason

Canon EOS-1D Mark III
Firmware Version 1.2.3
1/800Sec.
F4.0
Evaluative metering
ISO 100
EF135mm f/2L USM +2.0x
270.0 mm




