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12-04-2012, 08:17 PM   #1
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Lens Hood

I just bought a Pentax smc~A 28mm f/2.8 lens I am confused about the size of lens hood for this lens. Do I go by filter size, which is 49mm? Thanks Joe

12-04-2012, 08:24 PM   #2
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Yes, you'll want something for a 49mm filter thread, the other important thing is length. There are 3 basic lengths of hood, wide, standard and tele. If you're using this lens on something with a full 35mm frame, you'd want a wide one. On APS-C crop sensor digital cameras the standard length hood will work best.

I like rubber hoods for convenience, they collapse easily and you can use a pinch lens cap with them.
12-04-2012, 11:04 PM   #3
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+1 for 49mm filter thread and standard length for APS-C sensor but I prefer the metal lens hoods. Metal lens hoods are approximately the same diameter as the lens body, making it easier to squeeze the lens in and out of overly padded camera bags, and offer much better protection against accidental knocks than rubber lens hoods. If you happen to shoot without any filters protecting the front element, a rigid metal/plastic lens hood is the best alternative.
12-04-2012, 11:04 PM   #4
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There is a rectangular hood for A28/2.8 back in the day.
I used to have it but sold it.

It is almost exactly same rectangular hood with the 50/1.4 except it is shorter.
Other than that, the size is the same.

12-05-2012, 06:00 PM   #5
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My biggest lens diameter (at least a lens I commonly carry) is 52mm. I also have a few at 49mm. So I purchased a 52mm folding rubber lens hood, 52mm lens cap, and a 49-52 step-up ring. I carry only the one lens hood and can use it on everything in my bag. Ditto for the 52mm CPL filter.
12-05-2012, 07:10 PM   #6
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I bet you a 49-28mm step down adapter ring will work nicely for APS-C DSLRs. In the photo below, the lens attached to the camera is Pentax F 28mm F/2.8:

12-05-2012, 08:21 PM   #7
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QuoteOriginally posted by SOldBear Quote
I bet you a 49-28mm step down adapter ring will work nicely for APS-C DSLRs. In the photo below, the lens attached to the camera is Pentax F 28mm F/2.8:
SOldBear, I tried that with an FA28/2.8, and had pretty heavy vignetting. Not sure if it would work on the A 28mm. I use a 52 --> 37 step down ring on a Sigma 24mm, and that seems to work ok, although there might be the slightest bit of darkening in the corners.

For the OP, you could also look for a hood for a 50mm lens from the film days, that should work.
12-05-2012, 09:27 PM   #8
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QuoteOriginally posted by Nick Siebers Quote
SOldBear, I tried that with an FA28/2.8, and had pretty heavy vignetting. Not sure if it would work on the A 28mm.
Yeah. It's just trial and error. You can never tell. I sold the F28, with the 49-28mm stepdown ring, to a Pentaxian here. As far as I know, he's still using it that way.

The Sigma 30mm F/1.4 doesn't like stepdown ring at all.

12-18-2012, 08:51 PM   #9
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Petal lens hood for Pentax-A 28mm f/2.8?

Hello,

I have been deliberating over the same query as I have bought a 28mm without a lens hood.

I have the original Asahi Pentax one for my 50mm f/1.7 and I was considering using that except it is made of plastic. I don't want to be constantly changing it over for inconvenience purposes and the possibility of damaging the lens hood threads!

I have seen a similar looking 3rd party 'metal' version described as wide angle and I like the idea of this for protection.

My 18-55mm kit lens came with a petal lens hood and these are quite cheap.

Then there are the rubber variants.

I'm not sure which to get!

Nocturnal
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