Has Anyone Determined 300/305 Rolling Shutter Speed? at DVinfo.net

Eric Pascarelli · July 28th, 2010, 11:28 PM

When the EX1 came out, we were able to find out the scan speed of the rolling shutter by panning quickly at a constant speed on a perfectly vertical line and looking at two consecutive frames and counting pixels. We concluded that the EX1 scans from top to bottom in 1/60 second (compared to RED's 1/72 second at that time).

Has anyone done this with the 300/305?

If not, is there anyone who can do this test? If anyone can post or send two consecutive frames of a quick, steady pan on a vertical line, I can count the pixels. Narrow shutter is preferable at 23.976 or 24p.

I am looking to find out if the Canon is fast enough to use for animation reference and visual effects plates that would roughly temporally match a (global shutter) Sony F35.

Anything faster than 1/120 second would probably be in-spec for me.

Thanks.

Alister Chapman · July 29th, 2010, 01:19 AM

It's about the same speed or possibly just a fraction slower than an EX1R. Skew tests I did side by side with an EX1R produced very similar results.

Eric Pascarelli · July 29th, 2010, 01:36 AM

Thanks Alister.

Do you (or does anyone) know how the EX1R compares to the original EX1? Same or faster?

Thanks.

Alister Chapman · July 29th, 2010, 03:34 PM

Same for both cameras.

Eric Pascarelli · July 29th, 2010, 03:46 PM

Thanks.

I'm guessing that the Canons are 1/60 as well then. They would have to be at least that in order to achieve 60fps.

July 28th, 2010, 11:28 PM	#1
Eric Pascarelli Major Player Join Date: Nov 2007 Location: Los Angeles, CA Posts: 498	Has Anyone Determined 300/305 Rolling Shutter Speed? When the EX1 came out, we were able to find out the scan speed of the rolling shutter by panning quickly at a constant speed on a perfectly vertical line and looking at two consecutive frames and counting pixels. We concluded that the EX1 scans from top to bottom in 1/60 second (compared to RED's 1/72 second at that time). Has anyone done this with the 300/305? If not, is there anyone who can do this test? If anyone can post or send two consecutive frames of a quick, steady pan on a vertical line, I can count the pixels. Narrow shutter is preferable at 23.976 or 24p. I am looking to find out if the Canon is fast enough to use for animation reference and visual effects plates that would roughly temporally match a (global shutter) Sony F35. Anything faster than 1/120 second would probably be in-spec for me. Thanks.

July 29th, 2010, 01:19 AM	#2
Alister Chapman Inner Circle Join Date: Dec 2005 Location: Bracknell, Berkshire, UK Posts: 4,957	It's about the same speed or possibly just a fraction slower than an EX1R. Skew tests I did side by side with an EX1R produced very similar results. __________________ Alister Chapman, Film-Maker/Stormchaser http://www.xdcam-user.com/alisters-blog/ My XDCAM site and blog. http://www.hurricane-rig.com

July 29th, 2010, 03:34 PM	#4
Alister Chapman Inner Circle Join Date: Dec 2005 Location: Bracknell, Berkshire, UK Posts: 4,957	Same for both cameras. __________________ Alister Chapman, Film-Maker/Stormchaser http://www.xdcam-user.com/alisters-blog/ My XDCAM site and blog. http://www.hurricane-rig.com

July 29th, 2010, 01:36 AM	#3
Eric Pascarelli Major Player Join Date: Nov 2007 Location: Los Angeles, CA Posts: 498	Thanks Alister. Do you (or does anyone) know how the EX1R compares to the original EX1? Same or faster? Thanks.

July 29th, 2010, 03:46 PM	#5
Eric Pascarelli Major Player Join Date: Nov 2007 Location: Los Angeles, CA Posts: 498	Thanks. I'm guessing that the Canons are 1/60 as well then. They would have to be at least that in order to achieve 60fps.