10 Questions

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I have been reading this forum for about 3 weeks now and have found some topics which don't seem to have a conclusion.

Eg; in one thread the conclusion seems to be that you should split the fresnel in another it say you shouldn't.

What I am looking for is a concise, definitive answer as to which option is best and why (with pictures of results if possible).

Some may respond to say that the question is subjective and it depends on what you are wanting to achieve. I think it is fairly obvious what we all want to achieve. The best quality image for the cheapest possible price.

The following disagreements/questions should only be answered by people who have tried both methods and can use practical experience and examples to determine the best answer. Not by people that are trying to justify the decision they have already made.


1. Halogen (yellow light) VS Metal Halide (White light) is there a detectable difference?

2. MH 400w VS MH250w, does it matter?

3. Panel VS LCD monitor (stripped)
or
4. OHP VS Complete DIY (based on results), is the difference worth the effort

5. Fresnels Split VS Non-split
and
6. Fresnel Before LCD VS After LCD

7. Condenser lens for light source VS Light tunnel/Chamber

8. Light source positioned “before” VS “at” VS “after” reflector focal point

9. Response time : maximum ‘ms’ to get picture with no dragging
also
10. Minimum specs for enjoyable, “irk-free” gameplay/viewing.
 
Quick answers:

1. Difference... sure there is. Yellow light = Yellow tinted image 🙂

2. Both work well but 400w puts out more lumens. The downside is the lamp itself is larger.

3. Stripped LCD's... no question.

4. Complete DIY. Over Head Projectors simply lose too much light. With a complete DIY setup you can control more of the light and where it goes.

5 and 6. If your using OHP fresnels (aka DIYLABS) split them. If you wanna spend some money on large format fresnels you buy them as singles and can go either way. Both behind gives you best possible results.

7. I use both a condenser lens with a tunnel chamber. Condensers should be used no matter what kind of setup you design.

8. Spherical reflectors are designed for the arc of the bulb to be placed at the center of curvature. The center of curvature is exactly twice the focal length. Different types of reflectors require different setups.

9. For Response time you want the lowest (or fastest) possible number.

10. XGA uncompressed 1024x768. However I've seen good results from compressed 1024x768 also.
 
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