Norman Willis
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Hey Steve.
I could not get that link to work. Could you please send it again?
Thanks.
Norman Willis
http://www.nazareneisrael.org -
From Canon:
“The 82mm measurement that you provided has nothing to do with the light gathering abilities of the lens. It has everything to do with filter diameter, which is to say that it has nothing to do with the amount if light the lens is sensitive to.
The EF 16-35mm lens has a front aperture of f/2.8 versus the lens on the VIXIA HF S10 which has a maximum aperture of about f/1.8 and a lower sensitivity, 0.3 LX in the Night illumination mode. So the HF S10 has better light gathering ability in this area.
Once again, using lights with a higher wattage output will solve this issue. You can also consider increasing the ISO range on the EOS 5D Mark II.”
So what is the maximum ISO I really want to use?
Norman Willis
http://www.nazareneisrael.org -
Canon reports that I cannot shut off the auto-gain on the prosumer HF S10’s, so I really cannot compare it to my 5DM2 🙁
I don’t know anyone else in this area who has a DSLR (it’s rural).
Twelve feet from the lens is a black duvetyn (‘commando cloth’) backdrop. Directly in front of that is a bookcase. Five feet in front of that (seven feet from lens) is the talent. 16-35mm F2.8L USM lens set to F5.6, 1/60th, ISO 400: is it reasonable that I need twenty four each 45W fluorescent light bulbs (simulating 150W each) for a total of 1080W of fluorescent light, simulating 3600W of incandescent light (24 x 2800 lumens = 67,200 lumens)?
Is that reasonable? Or do I need to follow up? Thanks.
Norman Willis
http://www.nazareneisrael.org -
>>What was the f/stop of the lenses set to?
F/stop was 5.6, to get both the talent (7 feet to lens) and bookcase (12 feet to lens) in focus.
So perhaps a combination of no auto-gain (like on the prosumer cam), plus f/5.6 means I need lots more light with this rig?
Norman Willis
http://www.nazareneisrael.org -
Hi Ed.
Let me ask this better.
You had one Diva light with four bulbs. How many watts of light is that? And far was your light source from the subject/talent? What ISO? What F-stop?
I am looking to recreate the settings here, and see if my camera gives a similar, or if something is off and I need to recalibrate.
Thanks.
Norman Willis
http://www.nazareneisrael.org -
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Good question.
The 5DM2 needs more light on all three (lcd screen, external monitor and clips viewed on the computer).
I think I need to check out what Michael was saying about the possibility that the HF S10 is applying a lot of auto-gain (automatically boosting the ISO).
Norman Willis
http://www.nazareneisrael.org -
>>Also most of those small camcords have auto gain and can go as high as +18dB. So you have to shoot them side by side and compare the quality.
Is auto-gain like ‘auto-iso’?
So I have to make sure the auto-gain (auto ISO?) is shut off, and then compare the light needs of the two?
So maybe I was using four bulbs, but could have used a lot more?
Norman Willis
http://www.nazareneisrael.org -
*too* much to leave
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>>Well I use FCP and I have never needed to stretch one stream to match the other. If you are shooting correctly that is a step that should never be done.
I have two prosumer cams and one DSLR. The two-cam shoot was with the two prosumer cams (HF S10’s). After 1:48:48;01 Camera B was one frame after Camera A, and the H4N was 6 frames after Camera A.
I probably did not need to match up the two cams, but I did anyway; and six frames seemed like two much to leave.
Norman Willis
http://www.nazareneisrael.org