Originally posted by Trigger Happy Bayonet Mount 62mm Plastic Hood FOR 28 105mm Lens
As a general rule: If the instructions/description mention installing on TOP of a filter the hood will have "filter threads". Since there is no assurance where the threads will align when tightened, there's a second stage of threaded adjustment to ensure proper alignment.
Such hoods work just fine but are a bit inconvenient because of the threaded attachment rather than the "quick release" bayonet type. (M42 screw mount vs. PK bayonet.)
The sad truth: You'll not get best performance from any lens without a hood.They're a real PITA to carry around - use 'em anyway. And hoods designed for zoom lenses only count at the wide end of the focal length.
The good news: Any shade counts. Stacked, de-glassed filter rings are handy and don't take up much room. A piece of dark paper wrapped around the lens and extended until it noticeably vignettes (held by a rubber band or tape) works as well as the $50 plastic thingies. Use 'em; you'll see the difference.
H2