D
ditchdigger
Guest
never understood what they are for
why cutouts and not a full circle if you see what i mean...:shrug:
why cutouts and not a full circle if you see what i mean...:shrug:
purpleclouds
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The field of view may be cut off with circular hoods, particularly on wide angles! So they cut the hood to fit the edges of the viewfinder.....I think that makes sense! 
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Not just the viewfinder, the frame. Otherwise they show on the image as darkening in the corners (vignetting)
purpleclouds
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Werecow
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It depends on the lens what type of hood it needs.
Zoom lenses often need the petal hood to avoid vignetting at the wider end of it's range as the others have said.
Primes usually have a full hood, but they are still designed for their particular field of view.
Zoom lenses often need the petal hood to avoid vignetting at the wider end of it's range as the others have said.
Primes usually have a full hood, but they are still designed for their particular field of view.