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Originally Posted by vex What is the Rainbow effect in DLPs, how noticeable is it in very general PPoint presentations and DVD play out? |
Moving your head/eyes around a lot brings on the effect. With movies the action is always moving, and the screen tends to be in a position where it fills most of your line-of-sight. In a commerical install where the material is more static powerpoint stuff, and you are usually further back from the screen in relation to it's size, rainbows come up far less frequenty. You also tend to be using the screen for reference rather than staring intently and a high detail, constantly moving image.
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Originally Posted by vex What is the (iirc) barndoor effect on LCDs and how does it effect the above presentation types? |
You can make out the grid-structure of the projected image far easier than you can with a DLP. FRom distance much less of a factor, and if commercial use it's not something you are really going to care about
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Originally Posted by vex Have been looking at the Optoma EP739 DLP projector from Projectorpoint at £805 + VAT |
A very good projector, with a substantial warranty and a bargain price. We are Optoma dealers (although mainly Home Cinema) but I've not had much playtime with the business models. The brighter 758 or 759 would be required if you were trying for a large screen size (10ft+) or were in an extremely bright environment using a smaller screen (e.g. outdoor, conservatory, swimming pool area etc).
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Originally Posted by vex What alternatives are out thier at that price (can not break the £1000 inc vat mark) |
Stick with the Optoma I reckon.
DLP is also uniformly bright accross the whole image where LCD is dimmer at the edges, the high contrast also means for a "punchier" picture (for sake of a better word) in comparison to LCD.
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