Depth of Field - Canon GL2

Norm Couture · October 23rd, 2003, 12:55 PM

Alex wrote -" AV mode will also utilize gain without your control."

If you manually set the aperture at f1.6, the Av mode will play with the shutter speed, not the gain, will it?

OTOH, if you use Tv mode (Shutter priority), then the cam will play with the iris aperture and may get into gain, if you set the shutter speed too fast.

Alex Dunn · October 23rd, 2003, 01:02 PM

I welcome others to comment, but I assure you, it does utilize gain. It's considered an AUTO mode with the one exception you specify by choosing Av or Tv.

Now, let me qualify that by saying if it's not needed, obviously it won't use it, i.e., out by the pool at noon.

Paul Doss · October 23rd, 2003, 07:07 PM

Alex,

I'd like to see your jpgs. I will be glad to post them on my site for a while if you like.

Send to: office@thecountrybulletin.com

Alex Dunn · October 28th, 2003, 08:42 AM

Did you get the email?

Paul Doss · October 28th, 2003, 03:14 PM

Yes I did. Here is the link. Sorry couldn't get the link to look right in the preveiw, so you'll have to copy and paste.

http://www.thecountrybulletin.com/new_page_13.htm

Alex Dunn · October 28th, 2003, 03:25 PM

Thanks. Note that the color temp is not due entirely to the ND filter, I was toying with the white balance and I guess I changed something inadvertently. Also, the intersection in the distance is approx 200 yards (my best guess). As a frame of reference, the red vehicle in the third shot is a full size ¾ ton Dodge truck.

This experiment illustrates two things, 1) the ND filter built in to the GL2 is roughly three stops, and 2) the DoF made possible by using it.

October 23rd, 2003, 12:55 PM	#16
Norm Couture Regular Crew Join Date: Sep 2003 Location: Quebec, QC, Canada Posts: 123	Alex wrote -" AV mode will also utilize gain without your control." If you manually set the aperture at f1.6, the Av mode will play with the shutter speed, not the gain, will it? OTOH, if you use Tv mode (Shutter priority), then the cam will play with the iris aperture and may get into gain, if you set the shutter speed too fast. __________________ Norm :)

October 28th, 2003, 03:14 PM	#20
Paul Doss Regular Crew Join Date: Feb 2002 Location: Gulf Shores, Alabama Posts: 57	Alex's Photo Yes I did. Here is the link. Sorry couldn't get the link to look right in the preveiw, so you'll have to copy and paste. http://www.thecountrybulletin.com/new_page_13.htm

October 23rd, 2003, 01:02 PM	#17
Alex Dunn Major Player Join Date: Aug 2002 Location: Phoenix, AZ Posts: 202	I welcome others to comment, but I assure you, it does utilize gain. It's considered an AUTO mode with the one exception you specify by choosing Av or Tv. Now, let me qualify that by saying if it's not needed, obviously it won't use it, i.e., out by the pool at noon.

October 23rd, 2003, 07:07 PM	#18
Paul Doss Regular Crew Join Date: Feb 2002 Location: Gulf Shores, Alabama Posts: 57	Alex, I'd like to see your jpgs. I will be glad to post them on my site for a while if you like. Send to: office@thecountrybulletin.com

October 28th, 2003, 08:42 AM	#19
Alex Dunn Major Player Join Date: Aug 2002 Location: Phoenix, AZ Posts: 202	Did you get the email?

October 28th, 2003, 03:25 PM	#21
Alex Dunn Major Player Join Date: Aug 2002 Location: Phoenix, AZ Posts: 202	Thanks. Note that the color temp is not due entirely to the ND filter, I was toying with the white balance and I guess I changed something inadvertently. Also, the intersection in the distance is approx 200 yards (my best guess). As a frame of reference, the red vehicle in the third shot is a full size ¾ ton Dodge truck. This experiment illustrates two things, 1) the ND filter built in to the GL2 is roughly three stops, and 2) the DoF made possible by using it.