Premium Member Jay Young Posted November 12, 2019 Premium Member Share Posted November 12, 2019 I’d love to build or have built some small beam projectors. anyone have any experience? I’m having trouble finding sources for reflectors. I would really like something less than 1000 watts, preferably like in a small pepper or tweeties housing. thoughts? Link to comment Share on other sites More sharing options...
Ed Conley Posted November 12, 2019 Share Posted November 12, 2019 DEDO lights. they also have a projector lens attachment. there are Chinese made projector lenses but you would have to make an adapter ring to fit on tweenies.https://www.amazon.com/gp/product/B07GJQMYGF/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=cornicellopho-20&creative=9325&linkCode=as2&creativeASIN=B07GJQMYGF&linkId=e15d703759c89edf52e304bd52830f7e Link to comment Share on other sites More sharing options...
Premium Member Phil Rhodes Posted November 13, 2019 Premium Member Share Posted November 13, 2019 I'm not sure if there's a practical difference between a beam projector and a profile (er, ellipsoidal.) The results are arguably fairly similar, but a beam projector like a Molebeam where the entire optical system consists of a single parabolic reflector (and perhaps a few baffles) is, I'd think, likely to be quite a bit more efficient. Less flexible, though. From what I've seen, a Molebeam or similar is designed to project as near to a parallel beam of light as possible. Most Source Fours, Dedos, etc, won't really do that, although I suspect that in many situations that might not matter too much. However, I have often seen them used to do things like sunbeams through windows, often in haze so it's visible. In this situation it is much more correct to have a near-parallel beam, given the effectively infinite distance of the sun. The limiting factor is of course the diameter of the reflector; for really correct results the reflector should be larger than the window (for instance) you're projecting the light through. For that reason I'm not sure if a small beam projector really makes that much sense unless you have a specific application in mind - you might just as well go and buy some Source Fours. I bought old (late 90s) Coemar Centro and converted them to 150W ceramic. P Link to comment Share on other sites More sharing options...
Premium Member David Mullen ASC Posted November 13, 2019 Premium Member Share Posted November 13, 2019 I agree -- the pattern of a Molebeam isn't great, the main advantage is just getting a lot of light concentrated in a beam. On a smaller scale, a spot Parcan or a Source-4 Leko is probably better. Link to comment Share on other sites More sharing options...
Premium Member Jay Young Posted November 13, 2019 Author Premium Member Share Posted November 13, 2019 A spot par can is probably the likely choice I guess. I just wanted something Physically smaller than a Leko. I’m going to keep working on my end, thanks for the suggestions. Link to comment Share on other sites More sharing options...
Premium Member Phil Rhodes Posted November 13, 2019 Premium Member Share Posted November 13, 2019 Coemar Centros are physically smaller than most lekos, and they're not the only small type. There are miniature Source Fours, too. Small optics do start to suffer a quite noticeable efficiency falloff, though. P Link to comment Share on other sites More sharing options...
Premium Member Jay Young Posted November 13, 2019 Author Premium Member Share Posted November 13, 2019 I've used those miniature lekos before, they are great. Anyhow, I'm still going to build a small beam projector. I'll let you know how it goes. Link to comment Share on other sites More sharing options...
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