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LLD Filter


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#1 James Rydings

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Posted 16 October 2007 - 09:49 PM

What is the mired shift value of the LLD filter, and how exactually does it work without requiring a stop compensation?

James
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#2 David Mullen ASC

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Posted 16 October 2007 - 10:34 PM

It's sort of a super Skylight/UV filter, not much of a mired shift.
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#3 James Rydings

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Posted 17 October 2007 - 12:16 AM

I have heard of people using this filter when they need to pull the 85 to help slightly in correcting at no compensation loss, which is why I was wondering what it mired shift value was and how much it actually helped. Does it actually noticably help, and is this the main purpose of this filter or does it also have another purpose?

Thanks,
James
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#4 David Mullen ASC

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Posted 17 October 2007 - 12:28 AM

It mainly cancels the excess UV light you get when you pull the 85 filter; it barely has any warming effect.

Truth is that with modern stocks being less sensitive to UV haze, I'm not sure the LLD is of much use anymore (it made more sense in the days of 5247 stock.) I just did a movie where I tested in a D.I. theater using Fuji Eterna 500T in daylight with no filter, and with the LLD filter, and I didn't see much difference, so I just decided to use no filter when shooting indoors in daylight, because I needed the speed (when I had enough light, I used the Eterna 250D stock.)

The LLD probably makes more sense outdoors when you pull the 85 filter at the end of the day to gain some exposure, in order to reduce the UV hitting the film. Indoors, that's less of an issue.

But I would shoot your own test to see.
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#5 James Rydings

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Posted 17 October 2007 - 03:18 AM

That makes a lot more sense now. Thank you for your help David.

James
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