300mm Telephoto Lens and Boudoire Photography, am I missing something? Locked

Started Mar 26, 2013 | Discussions thread
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Lee Jay
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There's a hint of truth in what you said...
In reply to En Trance, Mar 26, 2013

En Trance wrote:

Are you suggesting that as I get closer to an object, that it becomes darker? Just think, if the pirate ship sees the light house they should sail away from it coz the land is over there.

Pass the joint, that must be some good ish you smokin.

...but only a hint.

You used the word "strictly", which is wrong.

The other option, of course, is to increase aperture diameter as you get farther away.

Shooting at 20mm and f/4 (I have a lens for that) gives me an aperture of 5mm (20mm/4).  I could get 10 times farther away and shoot at 200mm and f/2.8 for an aperture of 71.4mm (200mm/2.8), which is more than 10 times as much aperture at 10 times the distance, which is why it's a "brighter" lens at f/2.8.  It'll capture more light from the same subject in the same scene illumination even though it's 10 times farther away, just because it's much bigger.

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Lee Jay
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