jusetan wrote:How is this possible, how can you have frame by frame scanning with a projector that uses a shutter blade?
I dropped by Clive's lair about a month ago and got to see one of his machines up close (inside and out). It uses a synchronized LED light source instead of a physical shutter, which dramatically simplifies the image path.
We live in interesting times, because both Clive and Roger offer amazing equipment at prices that are downright reasonable when you consider the relatively small numbers of units being sold.
clivetobin wrote: There is no shutter blade. Talking specifically about NTSC: By using a short exposure time, with no physical shutter, it is possible to run at 17.126 FPS and do frame by frame scanning with no blending between film frames. This gives a 3-4 pulldown, where one film frame goes to 3 video fields and the next film frame goes to 4 video fields, and repeat.
How do you synchronise?
Let me guess....
You take the output signal from the cam as a reference.
Then you need a motor with a speed signal output..
Or there is a sensor on the main axle from the unit.
Those two signals must be in sync.
You certainly have not much play room, here!!
At this speed...
I have another idea:
But first I want to say I do not have the ambition to think my ideas are better then yours or Rogers. No way! You both make fine units, ready to use. ....
Yes, the phase lock needs to be very tight. This requires a phase comparator with error integrator.
If you want to run 30 FPS or even 15 you will probably need a DC servo motor since stepping motors are hard pressed to run this fast.
studiocarter wrote:Will there be a way to upgrade to the new HD format(s), 1080i or p?
Who are you asking?
It will likely take the availability of suitable camera models that cost less than a house.
Also someone will have to decide what to do about the different aspect ratios. Black bars on the sides, or cut off everyone's heads and feet, or do vertical tilt and scan?
