Light loss? at DVinfo.net

Leo Mandy · February 6th, 2005, 09:17 PM

How much light can you expect to lose using a 35mm unit with a spinner CD? I noticed that my image are very dark and when I take the DV camera away, the difference using the DV with the 35mm is considerably brighter. Is this just one of the trade offs? Is there a way to help this?

Oscar Spierenburg · February 7th, 2005, 06:48 AM

Make sure the lens opening of the 35mm lens is set wide open, like 1,7.
Light loss is big, you can't just pick up the camera and film if the setting in interior. I have to use at least two 500w spots to get a warm soft light.
I think it's a disadvantage that's probably an advantage in terms of artisticy.
With real 35mm film, I think the light loss is about the same, so you have to learn lighting for movies, in stead of video.
More light is always better than gaining light on the DV camera (use it's auto exposure to determine what lens opening is required for the DV)
Outdoors is always OK.

Leo Mandy · February 7th, 2005, 06:58 AM

Yeah, I was just wondering if it was more a case of the GG - because it seems some people are using a light grade (I think that is what the term would be) and maybe that is letting more colours come through, but I could be wrong.

I have filmed some footage indoors and yes, I need my two 650W key and fill to help out and get respectable footage.

I just wanted to make sure it wasn't something I was doing wrong. Thanks!

Oscar Spierenburg · February 7th, 2005, 08:36 AM

Oh, I forgot..Sometimes the DV reacts to the strong lights (like the 650W when your adapter is still open and gives a very dark and grainy image. Try it with a dark blanked covering everything except the lens.

Steev Dinkins · February 7th, 2005, 12:10 PM

A static adapter with Beattie screen has nearly the same light sensitivity as the video camera itself so you don't need 1000 + watts of light. :) I know - the grain, the grain...

February 6th, 2005, 09:17 PM	#1
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	Light loss? How much light can you expect to lose using a 35mm unit with a spinner CD? I noticed that my image are very dark and when I take the DV camera away, the difference using the DV with the 35mm is considerably brighter. Is this just one of the trade offs? Is there a way to help this?

February 7th, 2005, 06:48 AM	#2
Oscar Spierenburg Major Player Join Date: Jan 2005 Location: (The Netherlands - Belgium) Posts: 735	Make sure the lens opening of the 35mm lens is set wide open, like 1,7. Light loss is big, you can't just pick up the camera and film if the setting in interior. I have to use at least two 500w spots to get a warm soft light. I think it's a disadvantage that's probably an advantage in terms of artisticy. With real 35mm film, I think the light loss is about the same, so you have to learn lighting for movies, in stead of video. More light is always better than gaining light on the DV camera (use it's auto exposure to determine what lens opening is required for the DV) Outdoors is always OK.

February 7th, 2005, 06:58 AM	#3
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	Yeah, I was just wondering if it was more a case of the GG - because it seems some people are using a light grade (I think that is what the term would be) and maybe that is letting more colours come through, but I could be wrong. I have filmed some footage indoors and yes, I need my two 650W key and fill to help out and get respectable footage. I just wanted to make sure it wasn't something I was doing wrong. Thanks!

February 7th, 2005, 08:36 AM	#4
Oscar Spierenburg Major Player Join Date: Jan 2005 Location: (The Netherlands - Belgium) Posts: 735	Oh, I forgot..Sometimes the DV reacts to the strong lights (like the 650W when your adapter is still open and gives a very dark and grainy image. Try it with a dark blanked covering everything except the lens.

February 7th, 2005, 12:10 PM	#5
Steev Dinkins Major Player Join Date: Nov 2004 Location: San Francisco, CA Posts: 613	A static adapter with Beattie screen has nearly the same light sensitivity as the video camera itself so you don't need 1000 + watts of light. :) I know - the grain, the grain...