gl2 "shallow focus" at DVinfo.net

Seth Richter · December 17th, 2003, 11:26 AM

I was wonder how to extend the focal length without paying for it royally. I know there is a wide angle adapter, which would change the length, but, not by much.. Anyone have any ideas?

Ken Tanaka · December 17th, 2003, 11:41 AM

Your question is confusing.

It's titled "shallow focus", which is a depth-of-field matter. But then you ask about changing the "focal length", which is often a matter concerning a lens' telephoto properties. Then you ask about a wide-angle adapter.

Can you clarify what you want to accomplish? Do you want to get a wider field of view or do you want to see birds' eyebrows from 1000 yards?

Seth Richter · December 17th, 2003, 11:44 AM

Sorry I meant "Shallow DOF"

Ken Tanaka · December 17th, 2003, 11:54 AM

OK. Please do a Search on DOF, as this has been discussed literally hundreds of times. We have a very large body of typing on the subject. Jeff Donald has also written an extensive article here on the subject.

Bottom line: With 1/4' ccds you're very limited. Back-up, zoom-in, open your iris as wide as possible. That's the story. Has nothing to do with adapters.

Seth Richter · December 17th, 2003, 12:02 PM

Thanks,

I have been trying to research it, but, after a few hours of trying to find any telephoto-type lenses that were cheep for the gl2, I decided to try and cut the middle man.

December 17th, 2003, 11:26 AM	#1
Seth Richter New Boot Join Date: Dec 2003 Location: Jacksonville, Florida Posts: 23	gl2 "shallow depth-of-field" I was wonder how to extend the focal length without paying for it royally. I know there is a wide angle adapter, which would change the length, but, not by much.. Anyone have any ideas? __________________ Solutions for a small planet.

December 17th, 2003, 11:41 AM	#2
Ken Tanaka Retired DV Info Net Almunus Join Date: Dec 2001 Location: Chicago, IL Posts: 6,943	Your question is confusing. It's titled "shallow focus", which is a depth-of-field matter. But then you ask about changing the "focal length", which is often a matter concerning a lens' telephoto properties. Then you ask about a wide-angle adapter. Can you clarify what you want to accomplish? Do you want to get a wider field of view or do you want to see birds' eyebrows from 1000 yards? __________________ Lady X Films: A lady with a boring wardrobe...and a global mission. Hey, you don't have enough stuff! Buy with confidence from our sponsors. Hand-picked as the best in the business...Really! See some of my work one frame at a time: www.KenTanaka.com

December 17th, 2003, 11:44 AM	#3
Seth Richter New Boot Join Date: Dec 2003 Location: Jacksonville, Florida Posts: 23	Shallow Sorry I meant "Shallow DOF" __________________ Solutions for a small planet.

December 17th, 2003, 11:54 AM	#4
Ken Tanaka Retired DV Info Net Almunus Join Date: Dec 2001 Location: Chicago, IL Posts: 6,943	OK. Please do a Search on DOF, as this has been discussed literally hundreds of times. We have a very large body of typing on the subject. Jeff Donald has also written an extensive article here on the subject. Bottom line: With 1/4' ccds you're very limited. Back-up, zoom-in, open your iris as wide as possible. That's the story. Has nothing to do with adapters. __________________ Lady X Films: A lady with a boring wardrobe...and a global mission. Hey, you don't have enough stuff! Buy with confidence from our sponsors. Hand-picked as the best in the business...Really! See some of my work one frame at a time: www.KenTanaka.com

December 17th, 2003, 12:02 PM	#5
Seth Richter New Boot Join Date: Dec 2003 Location: Jacksonville, Florida Posts: 23	focus Thanks, I have been trying to research it, but, after a few hours of trying to find any telephoto-type lenses that were cheep for the gl2, I decided to try and cut the middle man. __________________ Solutions for a small planet.