Lens Shade Advicegreenspun.com : LUSENET : Konica 35mm SLRs : One Thread
It's always best to use the correct lens shade for the specific lens. The correct hood offers the best protection from the light and helps eliminate the possibility of vignetting. If you must use a different hood, go from a wider angle lens to a lens not so wide. A 24 hood on a 35 is fine, though you do lose a bit of protection. Using the round normal lens hood on a 40mm may well induce vignetting--far better to use the 35mm hood. For those who aren't aware of the difference, the 21mm/2.8 hood is not the same as the 24/28mm hood--it is a bit narrower in depth. I don't know about you, but I have noticed vignetting when using my 24/2.8 with the hood when using a polarizing filter. I would opt to use the 21/2.8 for that scenario.
-- Anonymous, January 31, 2001