Model: CanonEW-78DHood
Apply:
EF-S 18-200 F3.5-5.6 IS (Canon 450D 500D 50D kit lens)
Backlight, side light or flash photography can prevent the entry of non-imaging light to avoid the mist.
Shun light and side light photography avoid scattering light into the lens.
Light photography or night photography avoid the interference of light entering the lens.
Can prevent accidental damage to the lens, and also to avoid finger inadvertently lens surface, but also to some extent for the lens block sand, rain and snow.
Hood is widely used in the backlight photography, in general, can avoid glare. However, if the light source closer, there are still likely to occur glare. At this point, you can hand side of the block the hood where the light source. Glare is eliminated from the viewfinder clearly observed in the