Can someone please double check my math?

[Jay Young]

Shooting 800iso + 45-degree shutter = 2 stops loss

 

Set light meter for 24fps @ 200iso = this is what I set on the lens

 

Working stop of T8 should reflect that on the meter @200 iso correct?

 

OR, I can set the meter at 800, and subtract 2 stops.

 

16 on the meter = 8 on my camera.

 

 

Secondly, I should be able to key light with a 650w Tungsten Fresnel at full spot from 10' which should give about 500fc.

Then, I can use a 5K at 20' on flood to provide about 200fc, or two stops down for fill.

 

Does that sound about right?

[David Mullen ASC]

Yes, f/16 at 800 ASA is the same as f/8 at 200 ASA.

 

Not sure you're going to get an f/8 at 200 ASA with a tweenie at full spot from 10' away...

[Igor Trajkovski]

According to ARRI Interactive Photometric Calculator:




...

[David Mullen ASC]

OK... seems to work on paper. At least there will be a 5K on hand if you want to key with the 5K and fill with the 650w.

[Jay Young]

OK... seems to work on paper. At least there will be a 5K on hand if you want to key with the 5K and fill with the 650w.

 

I laughed muchly at this. Good show!

 

I thought about keying with the 5k, but I would need a much less sensitive medium... I'm going to test in a day or twould and see how much I can get out of a tweeny.