How Big Does A Lens Have To Be

The EXIF data on the RAW image of this photo tells me that I photographed this owl in 2011 with a Nikon D7000 and a lens of 300mm focal length. The D7000 is a crop-sensor camera, and to compare like with like for different cameras, there is a convention to describe focal length in termsContinue reading “How Big Does A Lens Have To Be”