Film Speed at DVinfo.net

Mike Berlucchi · October 20th, 2006, 05:16 PM

Hey guys, does anyone have any idea what ASA film speed the XL2 sensor would compare to? Is this even possible to judge? Thanks ahead.

Alan James · October 23rd, 2006, 01:11 AM

Its heard its 320 ASA with -3 gain. I don't know what the gain turns it to if its turned to 3dB, 6dB ect. One day I was doing tests of digital vs celluloid (film is the final product, not a material) using 400 ASA 35mm Celluloid, and the images came out almost the same using 0 gain. Is turning up your gain like using a higher ASA film? AND... is there a number that tells you the range the film (meaning digital and celluloid) has. Not the speed (ASA) I want the range. So that consivably there could one day be a film made that will not reqire you to set an f-stop, it will pick up All the detail in dark areas and All detail in light areas. Kinda like an HDRI image without needing to take multiple exposures.

Rainer Hoffmann · October 23rd, 2006, 07:52 AM

Quote:

Originally Posted by Alan James

Its heard its 320 ASA with -3 gain. I don't know what the gain turns it to if its turned to 3dB, 6dB ect.

The "film" speed is doubled with every 3dB step of gain, i.e. if it's 320 ASA at -3dB it will be 640 ASA at 0db, 1280 ASA at +3dB and so on.

October 20th, 2006, 05:16 PM	#1
Mike Berlucchi Regular Crew Join Date: Sep 2004 Location: Brighton, Michigan Posts: 47	Film Speed Hey guys, does anyone have any idea what ASA film speed the XL2 sensor would compare to? Is this even possible to judge? Thanks ahead. __________________ Love Mike http://www.mikeberlucchi.com

October 23rd, 2006, 01:11 AM	#2
Alan James Regular Crew Join Date: Jul 2006 Location: Tampa, Florida Posts: 261	Its heard its 320 ASA with -3 gain. I don't know what the gain turns it to if its turned to 3dB, 6dB ect. One day I was doing tests of digital vs celluloid (film is the final product, not a material) using 400 ASA 35mm Celluloid, and the images came out almost the same using 0 gain. Is turning up your gain like using a higher ASA film? AND... is there a number that tells you the range the film (meaning digital and celluloid) has. Not the speed (ASA) I want the range. So that consivably there could one day be a film made that will not reqire you to set an f-stop, it will pick up All the detail in dark areas and All detail in light areas. Kinda like an HDRI image without needing to take multiple exposures.