flower lens hood

tennis-joe

tennis-joe

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Today I received a new flower lens hood. What I am wondering is should the long petals of the hood be vertical and the smaller ones horizonal or does it make a difference as long as it keeps out the light bouncing on the inside of the lens? It has a small white trangle on one of the smaller petals and does this mean it should be on top? There were no instructions and it came from Hong Kong in about a week. I thought it would be less obstructive than the round rubber hood but it seems the same. I also put a 48to49 expanding filter ring so the hood would fit on my Canon 50/1.4.
Joe
 
I'm not sure why you'd get a petal hood for a 50mm, but, yes, the larger petals go top and bottom.
Petal hoods are generally sold for zoom lenses that go into the wide range. They are essentially a compromise and designed to give some shade protection at the long end of the zoom, while not vignetting at the short end.
 
payasam said:
A petal hood is logical in the same way that a rectangular one is.
Click to expand...

You are quite right on this. I have read about petal shades...they are more effective than vintage style round ones. I just wanted rounded metal to match overall feeling of old RF camera. Rectangular hoods are hard to find, is this excuse? 😉

That triangle should help to align hood...against what? I imagine that once you screw it on lens, rest is to rotate it that long petal blocks side light from hitting front element. Probably there's trick with mount ring and there's another tringle ?
 
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