From: Kenton Brede
I've got a screw in lens hood for my M50mm and M28mm lenses that works
fine with my K-5, but when I tried it with my K1000, I get vignetting.
I found a hood for the 50mm on B&H but not for the 28mm. From what I
gather the official hood is a PH-S49 for the 28mm. Can't find that
anywhere. I found this snippet on Pentax Users, "For your M-28mm and
M-50mm, a 49-37mm and a 37-30.5mm step-down adapter ring will do
nicely." I've never worked with step-down rings but it doesn't make
sense to me to go from 49mm to 30.5mm. It seems like the lens would
vignette with that configuration.
Anyone have a bright idea or know of a source for manual lens hoods?
I've tried ebay and KEH and google of course.
Thanks,
That doesn't sound right. If it's already vignetting, a smaller diameter
hood is just going to make the vignetting worse.
I had a problem with my A 24/2.8 vignetting with polarizing filters on
K1000 & LX, even the ultra-thin ones and I fixed it by getting a 52mm to
58mm step-UP ring & using a larger diameter filter.
If your getting vignetting, you need a step-UP ring, like a 49mm to
52mm, and then you could mount a screw in lens hood like this one (or
something similar you can purchase locally):
http://www.bhphotovideo.com/c/product/649756-REG/Bower_HT52_HT52_52mm_Tulip_Lens.html#Overview
Even though it's a "tulip" hood, the hood part rotates around the
screw-in base so it will work on lenses where the front element rotates
when you focus.
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