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exposure on zoom in
I’m fairly new to the dvx100a. (coming from the Sony vx2000) While shooting a meeting in a medium dark hotel ballroom. (camera set to ‘F5’) (with iris on manual) the exposure was 2.8. 0r ‘open’ When zooming in for the close ups I noticed that I lost about a stop. I had never noticed this before. Back in the editing room it was very noticeable. Disconcerting. Is this normal? If so not a good deal. We don’t want peoples faces a stop under compared to the wide master shots. Is there a work around? Or I have got the camera set up wrong?
Thanks,
Richard
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3 Replies
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Every camera does this. The DVX lens is rated at 1.6 on the wide end, and 2.8 on the tele. If you had set 2.8 as your iris, it would have been consistent exposure from the wide to the tele. But by choosing “open”, you had a circumstance where the widest possible iris at tele is smaller than the widest possible at wide-angle.
But they all do this. The Canon goes from 1.6 at the wide to 3.5 at the tele, the Sony Z1 is 1.6 to 2.8… the JVC HD100 isn’t marked for it, it claims 1.4 all the way through, but in actuality it loses about a stop as well.
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In all fairness, this is lens dependent. True cinema lenses do not breathe down like consumer lenses. It’s a matter of money.
Steve Wargo
Tempe, ArizonaIt’s a dry heat!
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Exactly- it’s principally a function of optics. I’ve used tons of 35mm and 16mm zoom lenses that do this too. You have to pay serious, serious dollars to get a lens that maintains it’s widest aperture throughout the zoom range. Best to read the manual for the optics carefully and avoid shooting wide open.
Noah
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