Background
I have 10,500 ft (7 hours) of old 9.5mm film to go through. I'd like a proper viewer, but they're extremely rare in Australia. A film viewer is like a slide viewer – uses a low wattage bulb to show a small image. Instead of a viewer, I want to:
I have experimented with a Zebralight head torch (see http://www.mediafire.com/view/aq6apypayq0a0cd/Projector_02.jpg). Amazingly, I can get it to fit in the existing setup without modification. It just slides in. Three problems: the torch is a 90º beam type; I would have to keep changing batteries; and the image is a bit dim.
My Idea
My idea is to use:
Ques 1
What type of LED, power supply, and lens, would be most suitable? I'm not concerned about colour temperature. I simply want to view, edit, and send away for scanning.
Ques 2
How many lumens would I need to throw a 200mm image with an equivalent brightness to the original bulb? The bulb is 100W and the instructions say not to exceed an image 5 feet wide. I assume the manufacturers consider an image larger than that to be too dim when using a 100W bulb.
Ques 3
What would be a suitable beam angle for the lens?
Ques 4
Are there any household-style 240 LED lamps that might be useable? One that has a narrow beam, for instance. I'm thinking of pulling one apart and experimenting.
Thanks in advance for any suggestions.
I have 10,500 ft (7 hours) of old 9.5mm film to go through. I'd like a proper viewer, but they're extremely rare in Australia. A film viewer is like a slide viewer – uses a low wattage bulb to show a small image. Instead of a viewer, I want to:
- use a 9.5 mm projector
- replace the 100W lamp with a bright LED and lens
- throw a 200mm image on a sheet of paper
- and step through the films at the slowest speed.
I have experimented with a Zebralight head torch (see http://www.mediafire.com/view/aq6apypayq0a0cd/Projector_02.jpg). Amazingly, I can get it to fit in the existing setup without modification. It just slides in. Three problems: the torch is a 90º beam type; I would have to keep changing batteries; and the image is a bit dim.
My Idea
My idea is to use:
- A high power LED, probably something from the Cree XML-2 range.
- A ready-made power supply, preferably driven from 240 volts or 12 volts AC. Variable current if possible, over the full range of the LED. But fixed current is also okay.
- A 10º lens.
Ques 1
What type of LED, power supply, and lens, would be most suitable? I'm not concerned about colour temperature. I simply want to view, edit, and send away for scanning.
Ques 2
How many lumens would I need to throw a 200mm image with an equivalent brightness to the original bulb? The bulb is 100W and the instructions say not to exceed an image 5 feet wide. I assume the manufacturers consider an image larger than that to be too dim when using a 100W bulb.
Ques 3
What would be a suitable beam angle for the lens?
Ques 4
Are there any household-style 240 LED lamps that might be useable? One that has a narrow beam, for instance. I'm thinking of pulling one apart and experimenting.
Thanks in advance for any suggestions.