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Eclair ACL Regarding Timelapse
The motor listed on the ergomatrix page for the Bolex certainly wouldn't
drive the ACL as the torque on the ACL is considerably higher. However, I'm
sure the Mitchell version at $1785 would do it, if you could get the drive
mechanism adapted, as well as a suitable fixture. The reverse mode wouldn't
be a problem with a simple reverse gear I'd assume.
However, stepping motors have major drawbacks when used for timelapse work.
Firstly, they are incredibly shaky and the camera will vibrate heavily
whenever it's in use. Secondly, they're not very accurate, even though the
step angle is specific, they have a tendency to overshoot and you can find
yourself with an open shutter on certain frames. Synchronous motors and
drivers have a much greater range of control and will allow faster and more
accurate shutter/timelapse speeds.
I couldn't find any information on this unit if the exposure time can be set
independently of the timelapse. According to the blurb, minimum exposure
time is 1/6th of a sec which makes for an incredibly long exposure,
especially for daylight timelapse use. You'll be racking up lots of ND
filters to compensate. Either that or you'll be ending up with long blurry
streaks across the frame for moving shots or sticking to nightime use.
I think the $3000+ tag referred to was the Norris Intervalometer which is
far and away the best piece of timelapse kit ever built. It's a very
sophisticated unit with an electronic eye that will adjust shutter speed and
timelapse rate to match a specific exposure. It can also be adapted to fit
just about any self-capping camera. All the timelapse shots in NIXON were
filmed using one. If you have the money, you should go for it, I saw one on
Apart from that, I suppose all you can do is buy the ergomatrix model and
try it out.
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