HV20 Latitude and exposure details

Steve Brady · May 9th, 2007, 12:43 PM

Quote:

Originally Posted by Noah Yuan-Vogel

as I understand it, brightness just affects autoexposure. I would probably put brightness at -1 to avoid clipping highlights

Can you elaborate on this? Adjusting the brightness value doesn't seem to have any effect whatsoever on my HV20.

Noah Yuan-Vogel · May 9th, 2007, 12:50 PM

right, i was told it will just affect what the autoexposure considers to be correct exposure. So you might see a difference if you change the setting with autoexposure on, or maybe if you turn it on, put it in manual exposure and then back to automatic. I'll check when i get home. In any case, it doesnt seem that important unless you use autoexposure a lot.

Fergus Anderson · May 9th, 2007, 04:44 PM

Thanks Noah

I think Im getting my head round it all now

Glenn Thomas · May 16th, 2007, 09:05 PM

This is an interesting thread. I'm just curious though, what camera is the D20? The only D20 I know of is Canon's EOS D20 digital SLR.

Noah Yuan-Vogel · May 17th, 2007, 08:09 AM

I dont see a D20 mentioned anywhere in this thread... what are you referring to?

Ian G. Thompson · May 17th, 2007, 10:27 AM

The Arri d20 was mentioned earlier...it's a $100,000 digital camera I believe. Someone did a chart comparison in another forum showing how close the HV20's picture was to this cam....kind-a-scary.

http://www.arri.com/prod/cam/d_20/d_20.htm

Noah Yuan-Vogel · May 17th, 2007, 10:50 AM

Ohhh, that D20. right right. Yes that is the Arri D20. Sorry, and I'm the one who mentioned it :P . Yeah then again the Arri D20 has a ~3k 35mm sensor i believe so its hard to really compare with the HV20. I think the original graph was for cameras at ISO320, and I'm guessing the HV20 wouldnt do all that well at ISO320 as it would probably have to gain up full stop.

Brian Tori · May 17th, 2007, 06:58 PM

I just performed an ISO test with the HV 20. At 24p 1/48 F2.0, the camera is achieving 120 ISO. This seems right considering its small chip and high sensor count.

Noah Yuan-Vogel · May 17th, 2007, 10:51 PM

Sounds like what I'd expect. I wonder what a quantitative noise test would tell us about the sensor's performance at that level.

May 9th, 2007, 12:50 PM	#17
Noah Yuan-Vogel Major Player Join Date: Dec 2004 Location: New York City Posts: 613	right, i was told it will just affect what the autoexposure considers to be correct exposure. So you might see a difference if you change the setting with autoexposure on, or maybe if you turn it on, put it in manual exposure and then back to automatic. I'll check when i get home. In any case, it doesnt seem that important unless you use autoexposure a lot.

May 9th, 2007, 04:44 PM	#18
Fergus Anderson Major Player Join Date: Nov 2006 Location: London, UK Posts: 321	Thanks Noah I think Im getting my head round it all now

May 16th, 2007, 09:05 PM	#19
Glenn Thomas Major Player Join Date: May 2005 Location: Sydney, Australia Posts: 320	This is an interesting thread. I'm just curious though, what camera is the D20? The only D20 I know of is Canon's EOS D20 digital SLR.

May 17th, 2007, 08:09 AM	#20
Noah Yuan-Vogel Major Player Join Date: Dec 2004 Location: New York City Posts: 613	I dont see a D20 mentioned anywhere in this thread... what are you referring to?

May 17th, 2007, 10:27 AM	#21
Ian G. Thompson Major Player Join Date: Jan 2007 Location: Rockledge, Florida Posts: 351	The Arri d20 was mentioned earlier...it's a $100,000 digital camera I believe. Someone did a chart comparison in another forum showing how close the HV20's picture was to this cam....kind-a-scary. http://www.arri.com/prod/cam/d_20/d_20.htm

May 17th, 2007, 10:50 AM	#22
Noah Yuan-Vogel Major Player Join Date: Dec 2004 Location: New York City Posts: 613	Ohhh, that D20. right right. Yes that is the Arri D20. Sorry, and I'm the one who mentioned it :P . Yeah then again the Arri D20 has a ~3k 35mm sensor i believe so its hard to really compare with the HV20. I think the original graph was for cameras at ISO320, and I'm guessing the HV20 wouldnt do all that well at ISO320 as it would probably have to gain up full stop.

May 17th, 2007, 06:58 PM	#23
Brian Tori Major Player Join Date: Nov 2004 Location: Detroit, MI Posts: 408	I just performed an ISO test with the HV 20. At 24p 1/48 F2.0, the camera is achieving 120 ISO. This seems right considering its small chip and high sensor count.

May 17th, 2007, 10:51 PM	#24
Noah Yuan-Vogel Major Player Join Date: Dec 2004 Location: New York City Posts: 613	Sounds like what I'd expect. I wonder what a quantitative noise test would tell us about the sensor's performance at that level.