Spacing between the lenses as well as alignment of the two lenses. They must be perfectly aligned to each other on all three axis. An issue I identified with batch 1 was that the front lens had a very small degree of movement (part was 0.25mm undersized) that allowed the front lens to yaw. This was enough to prevent the lens from focusing corner to corner. That was fixed in batch 2.
So I have to make sure I don't allow movement in the wrong directions for this project.
As an example of how precise these lenses are, the difference between being able to see inter pixel gaps and not on a 1080P can be a difference of less than 1/8th of a turn of the cap screw on the front of the MK4. It runs on a standard M6 thread.
OK I picked up the prototype today and assembled it. Yeah it is a work in progress. I need to go back to my CADs because there are holes that do not line up and a few holes are not on the parts they should be. Easily correctable, just time lost is annoying. All I can say is it is HUGE and looks so cool.
I've drawn the lens in its fully extended position of what should be 150mm. The case is telescopic, so collapses to about 100mm. This gives you the extended throw range where the shorter the throw, the shorter the lens will be.
Hi, total NOOB here, appreciate all your help
Can you please advice overall between this two projects
Price range are the same, mobility and outdoor use with some daylight
OPTOMA GT1080HDR vs UHL55
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Below is a post I made in the screen forum sometime back, but it is equally applicable here, probably even moreso.
As will be explained below, probably the number one biggest mistake that people make when setting up a Home Theater Room or Media Room is to buy the projector first and then worry...