Rating a Cam w/DOF Adapter at DVinfo.net

Jon Wolding · March 4th, 2007, 11:55 PM

How would you rate a naked (no taking lens) camera/adapter combo?

Can you do this without focusing on a chart?
It'd be nice to have a table of ISO ratings for various cam/adapter combos.

Charles Hurley · March 5th, 2007, 01:26 AM

You could just use the same lens on all the cameras, or even the equivalent. The difference between a 50mm f1.4 Nikon and the same Canon lens will be negligible in all but the most scientifically rigorous tests.

Bob Hart · March 5th, 2007, 06:52 AM

INFO COURTESY OF A WEBSITE OF PETER GRAY DP WHO IN TURN ATTRIBUTES CLAIRMONT IN HOLLYWOOD FOR THE INFORMATION.

THIS INFO IS RELATED TO THE P+S TECHNIK PRO35.

CINE LENS STOP LIGHT LOSS LIGHTING LEVEL

T1.9 -1&2/3 STOPS needs T3.5
T2.0 -1&2/3 STOPS needs T3.6
T2.8 -1&1/3 STOPS needs T4.5
T4.0 -1 STOP needs T5.6
T5.6 -2/3 STOP needs T7.2
T8.0 -1/3 STOP needs T9.0
T11 -1/3 STOP needs T12.7
T16 NONE same T16
T22 NONE same T22

My imagining - and it is only subjective impressions from shooting with this adaptor, is the LETUS35 FLIP Canon XL and JVC GY-HD100 models probably perform similarly relating to light loss.

My own homemade with a AO5 dressed groundglass is about the same.

I'll leave it to the builders of the Brevis, SGPRO, Redrock M2 and others to make their own claims and to Quyen Le to correct any assumptions wrongly made by me about the LETUS35.

March 4th, 2007, 11:55 PM	#1
Jon Wolding Regular Crew Join Date: Jan 2007 Location: Tampa, FL Posts: 195	Rating a Cam w/DOF Adapter How would you rate a naked (no taking lens) camera/adapter combo? Can you do this without focusing on a chart? It'd be nice to have a table of ISO ratings for various cam/adapter combos.

March 5th, 2007, 06:52 AM	#3
Bob Hart Inner Circle Join Date: Dec 2003 Location: PERTH. W.A. AUSTRALIA. Posts: 4,476	INFO COURTESY OF A WEBSITE OF PETER GRAY DP WHO IN TURN ATTRIBUTES CLAIRMONT IN HOLLYWOOD FOR THE INFORMATION. THIS INFO IS RELATED TO THE P+S TECHNIK PRO35. CINE LENS STOP LIGHT LOSS LIGHTING LEVEL T1.9 -1&2/3 STOPS needs T3.5 T2.0 -1&2/3 STOPS needs T3.6 T2.8 -1&1/3 STOPS needs T4.5 T4.0 -1 STOP needs T5.6 T5.6 -2/3 STOP needs T7.2 T8.0 -1/3 STOP needs T9.0 T11 -1/3 STOP needs T12.7 T16 NONE same T16 T22 NONE same T22 My imagining - and it is only subjective impressions from shooting with this adaptor, is the LETUS35 FLIP Canon XL and JVC GY-HD100 models probably perform similarly relating to light loss. My own homemade with a AO5 dressed groundglass is about the same. I'll leave it to the builders of the Brevis, SGPRO, Redrock M2 and others to make their own claims and to Quyen Le to correct any assumptions wrongly made by me about the LETUS35. Last edited by Bob Hart; March 5th, 2007 at 07:01 AM. Reason: poor spelling

March 5th, 2007, 01:26 AM	#2
Charles Hurley Regular Crew Join Date: Feb 2007 Location: Brooklyn NY Posts: 128	You could just use the same lens on all the cameras, or even the equivalent. The difference between a 50mm f1.4 Nikon and the same Canon lens will be negligible in all but the most scientifically rigorous tests.