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#1 Jorge Espinosa

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Posted 05 September 2007 - 04:54 PM

Hey there,

My question is: Why is it that many Cinematographers choose to expose never under f2 and never above f8 ?

Cheers.
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#2 John Brawley

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Posted 05 September 2007 - 05:16 PM

Hey there,

My question is: Why is it that many Cinematographers choose to expose never under f2 and never above f8 ?

Cheers.



Hello Jorge.

That's usually the sharpest range of the lens In fact a general rule is that the lens is at its optimum about 2 stops down from it's maximum aperture. Of course, you sometimes do have to shoot outside of this optimum range. It might be because you need the extra DOF / Depth Of Field, or you may not have enough light.

jb
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#3 Jorge Espinosa

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Posted 05 September 2007 - 05:25 PM

Thanks a lot, John !

Cheers,
Jorge Espinosa
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#4 Michael Collier

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Posted 05 September 2007 - 05:57 PM

To add to johns post, which was spot on, below an f2.0 can cause a headache for the 1st ac as they pull focus. Less DOF means any little bit they might be off will be exagerated, so it makes the shoot a little tougher and perhaps longer, with little gain in terms of image astetics.

anamorphics are sometimes shot above a 2.8/4 split exclusivley (or at least when practicle) due to their lower DOF at similar feild of views. however note that I have not yet gotten to shoot an anamorphic yet.....yet.
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#5 Chris Keth

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Posted 05 September 2007 - 11:35 PM

I will also chime in. You talk about this f2-f8 range like it's a rule. It's definately not and you should realize this. I have shot scenes at 22 and I shot a scene a few years ago with a fast switar prime at f0.7. I'm sure other here can say similar stuff so it's definately not a hard and fast rule.
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#6 Jorge Espinosa

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Posted 06 September 2007 - 06:50 PM

Thanks a lot guys ! I was a 1st AC for a year, and i´m just getting started as DOP in a few little projects. Still, gotta learn by practicing a lot. I wanna ask so many things...

Then again, thank you.

Jorge Espinosa
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Media Blackout - Custom Cables and AKS

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Metropolis Post

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