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03-15-2013, 09:01 PM   #1
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Metal Hood Shape

Hi,

I am looking for a hood for some of my 50mm and 55mm lenses.

There are typically two shapes of the metal hood available, just wondering which one would you prefer. Does cylindriacal one (#2) may cause vignetting?

#1


#2


Also, do you prefer rubber or metal wood?

Thanks
Yusuf

03-15-2013, 09:14 PM   #2
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A rectangular hood, matched to the lens it is mounted on and appropriate for the film/sensor format is the best. Good luck. A matched petal-shaped hood is the practical equivalent.

For what it is worth, I exclusively use cylindrical metal hoods on my lenses that did not come with hoods. The main considerations are diameter (usually just a little larger than the filter thread) and depth. For APS-C, I use a "normal" hood with my 28mm lenses and a "tele" hood with my 50s and longer. If the hood you are using vignettes, you will need to use a shallower and/or larger diameter hood.

As you might imagine, hoods for fast ultra-wide angle lenses are pretty laughable and it sometimes makes better sense to use a carefully placed card or hand as a shade.

Steve
03-15-2013, 09:21 PM   #3
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QuoteOriginally posted by yusuf Quote
There are typically two shapes of the metal hood available,...
Actually, there is another shape of metal hoods. This one:

03-16-2013, 06:50 AM   #4
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For my 50mm, I've actually got the original Pentax plastic version which according to the text on the lenscap would do both, that you mention

"Standard lens 1:1.2-1.4 50mm 1:1.8 55mm. Asahi Opt. Co., Japan 52mm"


Last edited by Kerrowdown; 03-16-2013 at 02:51 PM.
03-16-2013, 10:59 AM   #5
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QuoteOriginally posted by SOldBear Quote
Actually, there is another shape of metal hoods. This one:
Interesting, Is that a step down ring? Does it really work? Can you post a bit more close up?
03-16-2013, 04:05 PM   #6
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QuoteOriginally posted by yusuf Quote
Interesting, Is that a step down ring? Does it really work? Can you post a bit more close up?
There are more details in this post.
03-18-2013, 04:03 PM   #7
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Looks like Sold missed the link, but indeed that's a step-down ring.

He was just mentioning it on another thread recently. Basically, though, the more bell-shaped hoods can physically be rather deeper without vignetting, whereas the cylindrical-shaped ones can be more compact while doing the same job. The real thing is basically the angle that the hood screens fromwith respect to the lens itself.

One advantage of the bell-shaped hoods (Apart from being able to stand the lens nicely while changing them) is somewhat more protection from bumps and knocks: they'll tend to dent rather than transfer the energy to the lens and camera itself, in case of major mishap. If it's a wider lens, they tend to help keep off any preciptiation etc somewhat better, too.

03-20-2013, 06:57 AM - 1 Like   #8
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QuoteOriginally posted by SOldBear Quote
Actually, there is another shape of metal hoods.
Well, I'm a convert ! My Chinon Auto MC 50mm f1.4 was pretty bad with lots of soft flare when wide open. A 49-28mm step down ring finally made its way from China and the effect is remarkable.

Before and after 1:1 crops.
Attached Images
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PENTAX K-7  Photo 
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PENTAX K-7  Photo 
03-20-2013, 08:14 AM   #9
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QuoteOriginally posted by Ratmagiclady Quote
Looks like Sold missed the link...
Not sure what I missed (assuming by "Sold" you mean me).

QuoteOriginally posted by kh1234567890 Quote
Well, I'm a convert !
I'll send you an invoice

Actually, thanks for the confirmation. I believe the hood helps, but have never done a comparison.
03-21-2013, 05:32 AM   #10
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QuoteOriginally posted by SOldBear Quote
I'll send you an invoice

Actually, thanks for the confirmation. I believe the hood helps, but have never done a comparison.
Same beneficial effect on a K-7 with a Pentax-M 50mm f1.4 fully open. Much sharper with the step-down ring hood. Same exposure and post-processing on both. Full sizes are on Flickr.





03-21-2013, 07:03 AM   #11
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Wtf!!!!! I can't believe the results differ so much' :s. I thought hoods fixed flares, not provide free resolution :s
03-21-2013, 07:29 AM   #12
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QuoteOriginally posted by SOldBear Quote
Actually, there is another shape of metal hoods. This one:
Soldbear can you provide the specifics on the reducer and cap setup for the 50mm?
Your recommendations for the 100wr work awesome. Is it the same?

Also do you have a recommendation for similar setup for a 35mm f2?
03-21-2013, 07:42 AM   #13
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QuoteOriginally posted by kh1234567890 Quote
Well, I'm a convert ! My Chinon Auto MC 50mm f1.4 was pretty bad with lots of soft flare when wide open. A 49-28mm step down ring finally made its way from China and the effect is remarkable.

Before and after 1:1 crops.
Thanks ... I have the same lens and this looks like a good solution ... J
03-21-2013, 08:02 AM   #14
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QuoteOriginally posted by crewl1 Quote
Soldbear can you provide the specifics on the reducer and cap setup for the 50mm?
I got my step-down ring from here. Turned up in 6 days. Not bad for 2 ($3).

As for the cap - 28mm clip-on caps do exist, but a better option may be a plastic push-on 51mm cap. Unfortunately these seem to be as rare as hen's teeth
03-21-2013, 12:22 PM   #15
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QuoteOriginally posted by crewl1 Quote
Soldbear can you provide the specifics on the reducer and cap setup for the 50mm?
Your recommendations for the 100wr work awesome. Is it the same?

Also do you have a recommendation for similar setup for a 35mm f2?
I listed what I used in the post I referred to:

- Step down to 28mm: FA 50mm F/1.7, DFA 50mm Macro, DFA 100mm WR Macro, F 28mm F/2.8, DA 40mm Ltd., DA 70mm Ltd., Tamron 90mm F/2.8 Macro, Sigma 50mm F/2.8 Macro.
- Step down to 37mm: DA 21mm Ltd.
- Step down from 62 to 49mm + 49mm Pentax metal hood: Vivitar 135mm F/2.8 Close Focusing.

Added:

- 40.5-37: Ricoh GXR A12-28mm
- 40.5-37 + 37-28: Ricoh GXR A12-50mm
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