crop factor for anamorphic lens on dragon

[Andrea Montanelli]

Hi guys! i'm planning to buy a set of anamorphic lens for my dragonsand i was wondering what is the crop factor if i shoot in various anamorphic modes
i was also thinking about accessories for shooting anamorphic: i have a 5'' and a 9'' red monitor , do any of reds viewfinders desqueezed the image during shooting?
what other accessories would you suggest? a small hd monitor?
and last but not least, what format setting do you suggest ? a customized 6k or the classic 4k anamorphic mode?
thanks!

 

[David Mullen ASC]

http://www.reduser.net/forum/showth...Info-and-Data-Sheets&highlight=dragon+formats

You can look up the specs on Phil's handy chart.

You want to know the crop factor compared to what? Anamorphic on a 4-perf 35mm camera? The vertical height recorded will determine that since you only need a 1.20 : 1 area of the sensor for 2X anamorphic photography if you want to end up with a 2.40 image.

The vertical height of 4-perf 35mm anamorphic is:
18.59mm (camera aperture) / 17.53mm (projector aperture)

According to Phil's chart:
6K 6:5 is 15.79mm tall
5K 6:5 is 13.49mm tall
4K 6:5 is 10.79mm tall

So divide the 4-perf 35mm height with the height of the Dragon sensor recorded in 6:5 mode to get the crop factor. I'd use the projector aperture figure since that's what gets viewed when you shoot in anamorphic on 35mm film. 17.53 ÷ 15.79 is only a 1.11X crop factor -- so shoot 6K 6:5 and you'll come the closest to same field of view as the anamorphic lens on a 4-perf 35mm camera.