I think E, and others hit it on the head. If it affects visual quality at all, I wouldn't be the slightest bit interested.
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I think E, and others hit it on the head. If it affects visual quality at all, I wouldn't be the slightest bit interested.
Using the typical large mechanical shutter with a barrel lens generates a lot of vibrations. A LCD shutter, I'm assuming, generates no vibrations at all. If it degrades the image slightly I'm betting it's still better quality than the typical large barrel lens/large shutter setup that generates vibrations galore.Quote:
Originally Posted by Robert Hall
Vibrations can be damped. Image degradation cannot be restored.Quote:
Originally Posted by domaz
Besides, for $400, if I wanted a shutter that big I'd make a roller blind, or if it was winter and I needed a project I'd make something like a huge Copal square. Speeds faster than 1/30 don't interest me on an 8x10.
???? This is a rediculous assumption unless you have some scientific proof. The beauty of the packard is that all of the moving parts offset each other almost perfectly and there is really NO vibration.Quote:
Originally Posted by domaz
In answer to the OP, I would have to say, I'd need to see how cumbersome it is, and evaluate whether there really is a need or not. Check my site. I've been able to make almost any image I ever wanted to make with 1910's technology. Not closed minded. Just need to weigh any real gains against any real losses.
Big Compounds and Ilexes do generate vibrations. Anything that moves will.Quote:
Originally Posted by Jim Galli
Show me some science. Don't just state things unequivocally. Parts that get thrown radially outward and then radially inward offset each other for a net zero effect. I think you're wrong. But I'm willing to listen.....Quote:
Originally Posted by E. von Hoegh
*sigh*Quote:
Originally Posted by Jim Galli
I can't "show" you anything. I can type a description, though. Those parts that "offset each other for a net zero effect" are actuated by other parts that don't get offset. The ring that actuates the leaves moves fifteen or twenty degrees, stops for the duration the shutter is open, then moves in the opposite direction to close the leaves - which, by the bye, contribute their own little perturbations to the mix, their inertia causing the shutter to move slightly around it's fore and aft axis. In the case of a Compound, the mainspring (under the cocking lever) has an input to the complex vibrations of the whole shutter as it starts, pauses, and completes it's travel.
I can go on, but don't see the point.
Edit - Those four cylinder engines in Model A Fords have two pairs of pistons always traveling in opposite directions. By your logic, there should be no vibrations. So, why does a four rattle your teeth ?
Quote:
Originally Posted by Robert Hall
Mine has a counterbalanced crank ;)Quote:
Originally Posted by E. von Hoegh
What does that do?Quote:
Originally Posted by Jim Galli