I am following this tutorial https://vimeo.com/51999287 to calibrate my 300/2.8L IS for Lensfun. I tried it out yesterday but I have a question about the Focal lens multiplier in Hugin. I own a 6D and I think I should insert x 1, but hugin added x 0.984.
According to Canon the sensor size is 36 x 24mm and according to The digital picture the sensor size is 35.8 x 23.9mm.
_MG_2550.CR2 (23.7 MB)