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Mark Dunn

Member Since 12 Dec 2005
Offline Last Active Yesterday, 12:42 PM
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Posts I've Made

In Topic: Changing frame speeds during filming

Yesterday, 12:39 PM

I took Roger's advice and bought a Minolta 601-XL with built-in intervalometer. Not sure how it works, though. I assume increasing the intervals makes for slower time lapses. I think this was a good way around the issue.

That's not what he meant. He meant software to alter the running speed in editing. A camera intervalometer does nothing like that- timelapses compress minutes, or hours, into seconds by exposing a frame every few seconds. I don't think that's what you wanted to do at all.

In fact increasing the interval makes time appear to run faster, not slower. At one frame per second, a minute passes in just over 2 seconds at 24fps. At one frame every 10 seconds, five minutes is compressed into just over a second and so on.


In Topic: Vaporite film preservation system

20 November 2018 - 01:06 PM

In the example I mentioned, the 1920s film is 16mm - not nitrate.

When I was working as a volunteer on the Royal Aircraft Factory registry at Farnborough some years back the small quantity of nitrate was kept outside in a safe.


In Topic: Vaporite film preservation system

20 November 2018 - 12:45 PM

Yes, the acetate goes to acetic acid. But Perry doesn't say if the 20s film is 16 or 35, so we don't know whether or not it could be nitrate.

IM (very limited) E magnetic film is more likely to be adversely affected. I've had differential shrinkage that causes it to waver through the Steenbeck so badly that it has to be held to the mag head with the thumb. If you pull it taut, only one edge is straight.This is 80s material. Quite smelly picture film runs fine. It shrinks, even in 20 years, but linearly.

If you have nitrate film, you arguably have greater problems, like working out how not to burn down your premises.


In Topic: D-tap to 12v XLR for SR2

19 November 2018 - 06:24 AM

I can't help with the details, but a motor only cares about voltage. The capacity in amp-hours merely determines how long a charge will last. Too low a rating may tax the batteries, but it won't hurt the camera. There's no such thing as too many amp-hours.


In Topic: Curious Kinoptik Lens Question

15 November 2018 - 07:34 AM

I'm probably wrong, but I've had a lens apart and that screw thread looks more like a focussing rack than a mount.


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Ritter Battery

Gamma Ray Digital Inc

rebotnix Technologies

The Slider

Abel Cine

Willys Widgets

FJS International, LLC

Glidecam

CineLab

Technodolly

Visual Products

Aerial Filmworks

New Pro Video - New and Used Equipment

Broadcast Solutions Inc

Wooden Camera

Tai Audio

Metropolis Post

Rig Wheels Passport

CineTape

Paralinx LLC

Media Blackout - Custom Cables and AKS