GL-2 ND filter at DVinfo.net

Bill Ball · October 26th, 2004, 09:15 AM

Does anyone know the strength of the built-in ND filter on the GL-2? I looked through my manual and could not find it.

Thanks

Robin Davies-Rollinson · October 26th, 2004, 11:03 AM

Bill,
You could work it out by exposing a scene with the ND filter on in manual mode, then switch filter off and see how many stops you have to close down to get the correct exposure.
I might try it for you later when I get home...

Robin

Ken Tanaka · October 26th, 2004, 06:07 PM

Offhand, I believe it's approximately 2 stops.

Alex Ratson · October 26th, 2004, 08:51 PM

I did my own little test on this a few days ago and it seemed to be about 2 stops.

Cosmin Rotaru · October 27th, 2004, 12:00 PM

Bill, as far as I know, every step up/down is 1/4 of a stop. So 8 steps should be 2 stops. Is that true guys? I need to be sure of this...

Tom Hardwick · October 28th, 2004, 05:16 AM

Not sure what you mean by the 'step', but half stops are shown in the v/finder. So f2 to f2.8 is a whole stop. f4 to f4.8 is a half stop. If you're filming at f4 and want to film at f5.6 you've got to double the amount of light in the room.

tom.

Cosmin Rotaru · October 28th, 2004, 09:10 AM

Thanks Tom. I'll have to check the viewfinder with your information.

October 26th, 2004, 09:15 AM	#1
Bill Ball Major Player Join Date: Jan 2004 Location: NEW JERSEY Posts: 216	GL-2 ND filter Does anyone know the strength of the built-in ND filter on the GL-2? I looked through my manual and could not find it. Thanks

October 26th, 2004, 06:07 PM	#3
Ken Tanaka Retired DV Info Net Almunus Join Date: Dec 2001 Location: Chicago, IL Posts: 6,943	Offhand, I believe it's approximately 2 stops. __________________ 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

October 27th, 2004, 12:00 PM	#5
Cosmin Rotaru Major Player Join Date: Feb 2003 Location: Romania, Timisoara Posts: 453	Bill, as far as I know, every step up/down is 1/4 of a stop. So 8 steps should be 2 stops. Is that true guys? I need to be sure of this... __________________ Cosmin Rotaru

October 28th, 2004, 09:10 AM	#7
Cosmin Rotaru Major Player Join Date: Feb 2003 Location: Romania, Timisoara Posts: 453	Thanks Tom. I'll have to check the viewfinder with your information. __________________ Cosmin Rotaru

October 26th, 2004, 11:03 AM	#2
Robin Davies-Rollinson Trustee Join Date: Dec 2002 Location: Gwaelod-y-garth, Cardiff, CYMRU/WALES Posts: 1,215	Bill, You could work it out by exposing a scene with the ND filter on in manual mode, then switch filter off and see how many stops you have to close down to get the correct exposure. I might try it for you later when I get home... Robin

October 26th, 2004, 08:51 PM	#4
Alex Ratson Regular Crew Join Date: Jul 2002 Location: Squamish, British Columbia, Canada Posts: 149	I did my own little test on this a few days ago and it seemed to be about 2 stops.

October 28th, 2004, 05:16 AM	#6
Tom Hardwick Inner Circle Join Date: Mar 2003 Location: Billericay, England UK Posts: 4,711	Not sure what you mean by the 'step', but half stops are shown in the v/finder. So f2 to f2.8 is a whole stop. f4 to f4.8 is a half stop. If you're filming at f4 and want to film at f5.6 you've got to double the amount of light in the room. tom.