12-35mm X - Constant Aperture through Video Zoom?

Started Sep 1, 2012 | Discussions thread
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Bmillz New Member • Posts: 11
12-35mm X - Constant Aperture through Video Zoom?

Apologies if this is a stupid question.

One of the reasons I was excited about the 12-35mm lens was the idea it would have a constant aperture, so that I could do a slow zoom on a character and I wouldn't see the light change or flicker. But, it's definitely happening with this lens.

Check out this video:
https://vimeo.com/48662408
password: 1235

I've messed around with the exposure settings in movie mode. But, all of them do the same thing. Am I doing something wrong? Or was I wrong to expect this lens to do that?

PS. It should be noted: I used the new "Apocalypse Now" hack with the lens:

personal-view.com/talks/discussion/4391/apocalypse-now-quest-for-simulated-444-smooth-cinema-quality-driftwood-cbrandin-bkmcwd?Sort=newest

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