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Author Topic: 2/3 of a stop neutral density filter
Michael Wright
Expert Film Handler

Posts: 184
From: Chorley, Lancashire, England
Registered: Dec 2008


 - posted November 30, 2009 07:32 AM      Profile for Michael Wright   Email Michael Wright   Send New Private Message       Edit/Delete Post 
Hi, one of the above is recommended by Kodak to use Ektachrome64 film in a super8 camera that only accepts 40asa film. Has anyone actually seen one of these for sale? I certainly haven't MIKE

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Bart Smith
Expert Film Handler

Posts: 228
From: Hackney, London
Registered: Feb 2007


 - posted November 30, 2009 08:06 AM      Profile for Bart Smith   Author's Homepage   Email Bart Smith   Send New Private Message       Edit/Delete Post 
Hi Mike,

I've looked into this in the past, the simple answer is no!

It would be easier for you to get a different camera that will read 64 correctly.

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www.bluecinetech.co.uk

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Michael Wright
Expert Film Handler

Posts: 184
From: Chorley, Lancashire, England
Registered: Dec 2008


 - posted November 30, 2009 08:10 AM      Profile for Michael Wright   Email Michael Wright   Send New Private Message       Edit/Delete Post 
Thanks Bart.

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Steve Klare
Film Guy

Posts: 7016
From: Long Island, NY, USA
Registered: Jun 2003


 - posted November 30, 2009 08:12 AM      Profile for Steve Klare   Email Steve Klare   Send New Private Message       Edit/Delete Post 
The problem is if the camera meters through the lens, the 2/3 stop ND filter won't actually compensate the exposure, it will just reduce the light available. This will work if the filter reads the light seperately from the lens, then the metering system will allow 2/3 of a stop of excess light, which the filter will remove and bring you back to where you want to be.

I experimented with a camera that allows for exposure compensation and tried exposing 64T at 40 and 64ASA under the same conditions, the results weren't very different and neither was visibly better than the other.

If you try a test cartridge in a 40 ASA camera, you will probably like what you see.

(You just need to be sure you are actually getting 40 ASA and not 160.)

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All I ask is a wide screen and a projector to light her by...

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Claus Harding
Phenomenal Film Handler

Posts: 1149
From: Washington DC
Registered: Oct 2006


 - posted November 30, 2009 08:18 AM      Profile for Claus Harding   Email Claus Harding   Send New Private Message       Edit/Delete Post 


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"Why are there shots of deserts in a scene that's supposed to take place in Belgium during the winter?" (Review of 'Battle of the Bulge'.)

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Bart Smith
Expert Film Handler

Posts: 228
From: Hackney, London
Registered: Feb 2007


 - posted November 30, 2009 08:42 AM      Profile for Bart Smith   Author's Homepage   Email Bart Smith   Send New Private Message       Edit/Delete Post 
The Eumig Mini 3 doesn't have TTL metering, so a 2/3rd stop ND over the lens would work.

If you could get hold of one!

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www.bluecinetech.co.uk

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Steve Klare
Film Guy

Posts: 7016
From: Long Island, NY, USA
Registered: Jun 2003


 - posted November 30, 2009 09:03 AM      Profile for Steve Klare   Email Steve Klare   Send New Private Message       Edit/Delete Post 
Have you tried it filter-less, Bart?

There's a theory out there that a little overexposure will tighten up the grain and may actually be a benefit. At least in my K40 adjusted eyes the 40 ASA exposed 64T was still a little on the grainy side.

Otherwise a half stop ND will at least get you in the neighborhood.

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All I ask is a wide screen and a projector to light her by...

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Douglas Meltzer
Moderator

Posts: 4554
From: New York, NY, USA
Registered: Jun 2003


 - posted November 30, 2009 09:10 AM      Profile for Douglas Meltzer   Email Douglas Meltzer   Send New Private Message       Edit/Delete Post 
Michael,

You would need a 0.2 ND filter. What filter diameter does the camera accept?

Doug

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I think there's room for just one more film.....

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Bart Smith
Expert Film Handler

Posts: 228
From: Hackney, London
Registered: Feb 2007


 - posted November 30, 2009 09:20 AM      Profile for Bart Smith   Author's Homepage   Email Bart Smith   Send New Private Message       Edit/Delete Post 
My advice would always be to try one cart and see how people get on with it. The accuracy of the internal meter is an unknown anyway.

There is precious little light here in the UK at the moment anyway, so 2/3 stop overexposure might be just the ticket.

I've seen the results of running 64T in 40/160T only cameras many many times as I telecine it, very often it is perfectly OK, but sometimes it can be too washed out.

Many people (especially beginners) try to film in too low light levels anyway, so it can be a positive when you take into account all the swings and roundabouts!

It is possible to get 0.2 ND polyester filters, but I don't remember seeing glass screw-in ones. Unless you want to spend a LOT of money!

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www.bluecinetech.co.uk

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