silly question...

[UKBob]

does a lens hood slightly lessen the amount of light reaching the sensor, even though it is not in the FOV?

[trackdemon]

Yes. And no.

Does that help?

[poah]

it stops light coming in from the side as its there to reduce flare.

[UKBob]

trackdemon said:

Yes. And no.

Does that help?

hmmm

poah said:

it stops light coming in from the side as its there to reduce flare.

Put another way then, will my 24-70 lens hood (which is massive, and never comes off the camera) ever reduce my shutter speed, if only slightly?

[F308 MAN]

i) stick the camera on a tripod and shoot with/without.
ii) analyse results.
iii) have a beer.
cheers, d

[V6GTO]

UKBob said:

Put another way then, will my 24-70 lens hood (which is massive, and never comes off the camera) ever reduce my shutter speed, if only slightly?

No.

Martin.

[UKBob]

V6GTO said:

UKBob said:

Put another way then, will my 24-70 lens hood (which is massive, and never comes off the camera) ever reduce my shutter speed, if only slightly?

No.

Martin.

Cheers martin

[VxDuncan]

It will stop most of the scattered light hitting the front element at an angle. You won't be recording this, but the contrast will improve as you're getting rid of the "noise".
You might get slightly more vignetting if it's badly designed.

[UKBob]

VxDuncan said:

It will stop most of the scattered light hitting the front element at an angle. You won't be recording this, but the contrast will improve as you're getting rid of the "noise".
You might get slightly more vignetting if it's badly designed.

So in theory, even if you dont pick up lens flare, most shots should have a slightly better contrast, if only very very subtly?

[VxDuncan]

As far as I'm aware yes. Basically your multicoatings, matt black innards etc are all to cut down scattered light to reduce reflections (and therefore increase contrast).

[doodah]

an overlit background can/will cause a loss in contrast - think, over-exposing a backlit subject.

Edited by doodah on Friday 9th March 21:46