Can you film some of these tests Doug for our viewing pleasure? :-)
The issue should not be destruction point as this is likely by far quite excessive. More likely than destructive overload weight is shearing force -- imagine an overeager AC dashing through a doorway and slamming the rods sideways into the doorframe. Trust me I've seen it. The shearing force of either the screws or the metal into which they are threaded will be the likely failure point here.
But what you should really care about is deflection weight. How much weight can be put upon the rods at a given distance (say six inches) before they deflect (bend downward) by a given measure, which should be enough to take a lens out of planarity with the image sensor by straining the mount. I would put this at a fairly low percentage of deflection angle, perhaps a degree or two.
This is why Aatons use steel rods instead of aluminum for their similar rod design to this. Not saying that these rods won't handle the weight just fine, but this is in fact the critical test.
Any chance this will be released in the next two weeks?
Looks like a great option for my light setup, Thanks Douglas.
If you guys think a degree of deflection is way too much then best you stick with 19mm steel rods. Trust me, I know what happens in the real world.
I think the real benifit of this system is not lens support (15mm aluminum 60mm spaced rods won't support a 20-100), but hand held and jib/steadicam with primes. It would be very nice to fly a prime, an mb-19, and a couple of motors on these rods.
|« Previous Thread | Next Thread »|