Behind the scenes of Lathe Action 3
This image follows on from my gallery image Lathe Action 2 where I used rear curtain flash sync to partially freeze chuck motion.
In this case flash was only used for that purpose, and only impacted on the overall exposure by a small amount, the main lighting being the workshop lights. Exposure was 1.3 secs at ISO200 at f16. Flash on manual at 1/2 power.
Determining the best lathe speed was a bit of trial and error over the range 210, 300, 420 and 600rpm. The greatest sucess rate was at 420rpm. At slower speeds motion was frozen too sharply. At 600 rpm the freeze was less distinct.
I have attached a composite of the two images that show this technique in action. My feeling is that if this technique is used to reinforce the sense of motion, it works best at an angle rather than straight on. Chuck on the left hand shot is spinning at 300rpm whereas on the right it is 420rpm.
An interesting experiment.
I attach a pic of the cluttered bench layout to give some idea of the limits for composition and lighting.
The tripod ( Benbo ) is strapped down to an ammunition tin full of steel bar ends for stability. Which is seriously heavy as I can only just pick it up.
SB80 flash ( pic attached ) is mounted to my light stand on part of Foxy's " swiss army knife" flash bracket, the current workshop project. Pic of the work in progress bracket as of Thursday evening is in my gallery.
Don
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