[Dan K] had just such a lens from Sigma, but wanted to get it working fully with a camera using the Canon EF lens fitting. Hacking ensued. The lens in question was a Sigma 15-30mm f/3.5-4.5 EX DG ...

Canon seems to have avoided the problem. There is no sign of flare in normal use or even with very severe light sources at the edge of the image field. Chromatic aberration (CA) is the lens ...

This is a very high standard of sharpness and it is no surprise that the lens turns in sharp, crisp images right through its focal length range. The blue column represents readings from the centre ...

Canon has unveiled a new broadcast lens called CJ27ex7.3B. This latest broadcast lens is tailored for captivating visual storytelling. This innovative lens introduces Canon's first 2/3” portable ...