AVS Addicted Member
Join Date: Dec 2000
Location: brookeville, maryland, usa
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Tim. The second choice is for a much heavier projector than you have. The basic differences between the first and the third, is that the third comes with an extension pole. All the mounts identified have universal arms for attaching the projector to mount via a quick disconnect.
I would recommend that you purchase a Chief mount instead and one that has a dedicate mounting plate instead of spider arms. Cleaner and more tight A Chief RPA281 or RPMA281 will do the job. You will need a ceiling flange plate to attach the mount to your ceiling which connects to the mount by a length of threaded pipe. The ceiling flange has a socket for a 1 1/2 inch NT threaded pipe. You can buy one at Home depot in the plumbing section for about $4 or you can buy various ones, occupying more ceiling area , prettier for about $30. CMS115 etc. The only issue here is how long a pipe do you need. Chief sells pipes, threaded at both ends that are either fixed length or of adjustable length. These pipes are relatively expensive but you can buy threaded fixed length pipes at home depot (1 1/2 inch NT threaded), The minimum length is a no length piece which is just threads with no pipe unthreaded visable. This length will allow the tightest fit to the ceiling and in your case place the projector as high as you can go practically. The reason for using the pipe instead of bolting the mount to the ceiling directly with a flange or flange plate and a piece of pipe is that it allows you to rotate the mount slightly to get perfect alignment to your screen. The longer the pipe the lower the projector will be. I would suggest buying several pieces from home depot, and they come in black, their black gas pipes, of various lengths. Just threads, 2 inches, 4 inches, 6 inches, three inchesand experiment with your set up. At the end return the lengths you don't need. a piece of the pipe, short lengths of pipe threaded at both ends, are called pipe nipples. Pieces are cheap and cst increases as you increase the length. But we are talking maybe $5. Generally projector lenses perform best when the lens center is no higher than screen top. The JVCs will let you shift the image to accommodate higher lens center but this does cause a small lost in sharpness for the portions of the image farther away from lens center and will increase CA errors. Many people say I use more lens shift and things are fine. No they aren't they just don't know what to look for. Let's call them somewhat blind. No competent industry professional will mount higher than lens center at screen top unless the customer insists But you can experiment and see what you see looking carefully at edge extremities and for CA errors on grid patterns. Give Mike or Craig a call at AVS. They stock the mounts and can explain all this to you and present options including getting a short adjustable pole. Hope this helps...
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