Want to know how to decipher the colored rings on Canon's lenses? Or possibly the difference between fluorite, aspherical and UD lenses? Or why some black lenses allow focusing past infinity?
Check out Canon Professional Network's Infobank for the answers to these questions plus a wealth of information on other topics.
Infobank Lens Topics
|Construction||Fluorite, aspherical and UD lenses|
|Focal length||Prime and zoom lenses|
|All about apertures||Image stabilization|
|Lens speed||Tilt and shift lenses|
|Focusing and depth of field||Extenders|
|Black or white lenses||Extension tubes|
|Coloured rings||Macro lenses|
|Lens mount||Close-up lenses|
|EF-S and field of view||Filters|
|L-series lenses||DO elements|