Lens flare happens when a bright light (usually the sun) shines on the surface of the lens, and then takes a path other than the primary one to reach the sensor. A lens hood prevents this by blocking light sources outside the field of view..
A flower-petal hood is shaped to exactly match the field of view of a lens, while a circular hood provides more protection at the corners of the image, but less at the sides. A flower-petal hood is used with a wide-angle lens because the circular equivalent would not provide much shade at all...
Carnildo wrote:.
A flower-petal hood is shaped to exactly match the field of view ofa lens, while a circular hood provides more protection at thecorners of the image, but less at the sides..
To make this more clear, a petal hood and a circular hood provides the same coverage in the corners. A petal hood provides better coverage than circular at the sides..
Seen in a fortune cookie:Fear is the darkroom where negatives are developed..
Check out this article. If you want to skip the words there are pictures of the various shapes near the bottom:.
Http://www.vanwalree.com/optics/lenshood.html.
Seen in a fortune cookie:Fear is the darkroom where negatives are developed..
Moxi, Australia.
Hi there, to put my penny's worth into this discussion. Your lens shade is round - your picture format is square or oblong. If you would not have the cut-out sectionon the side your lens shade would intrude into your pictue in the corners. Try this out by holding your finger to the side of the lens shade.Cheers..
...Bob, NYC.
Http://www.pbase.com/btullis.
You'll have to ignore the gallery's collection of bad compositions, improper exposures, and amateurish post processing. .
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Re it's not about blocking sunlight from directly hitting the lens, because it's never below <.
What happens when you turn the camera sideways to take a vertical picture?.
BAK..
Is it proper to attach a petal hood to a lens with rotating front element?.
I was at a fund-raising dinner last night and a pro shooter had an A100 in addition to his D80. The A100 was fitted w/ a Sony 75-300 and had a petal hood. I might be wrong but wouldn't the rotating front element defeat the petal hood's purpose?.
Thanks!!!..
When there's a rotating front element, the hood is attached to a non-rotating portion of the lens, as a rule. I'd imagine there's at least one cheap lens out there that doesn't comply to this, but it should be the exception..
...Bob, NYC.
Http://www.pbase.com/btullis.
You'll have to ignore the gallery's collection of bad compositions, improper exposures, and amateurish post processing. .
Image control:Zoom outZoom 100%Zoom inExpand AllOpen in new window..