AVS Special Member
Join Date: Aug 2000
Location: Southern California, USA
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There is a program that calculates the proper throw distance for Sony projectors, including the 10HT. It allows you to change the screen size, etc., and to calculate what the minimum and maximum throw distances are for projector given a certain screen size. I think it's called "PJCalc!" If you do a search for this or in recent threads re the 10HT (i.e., within the past 30 days) in this forum, you should be able to find it. I seem to recall that for the 10HT the calculation reveals that the throw distance for an 8' wide, 16:9 screen ranges from about 11.5 to 13.5 feet.
If you replace the 10HT lens with the lens made for the Sony VPL400Q, which also fits the 10HT but with a small gap around the edges, this will give you a longer throw, and PJCalc will once again give you the throw calculation. I seem to recall that, for the same 8' wide screen, this allowed you to put the 10HT about 16' feet back or farther. If you use the other option for a longer throw for the 10HT (a lens made by Buhl Optical), this puts you back around 19' for the same size screen. You can get more information by calling Buhl Optical at the number on their site (buhloptical.com.)
You can also find a lot of useful info re the 10HT, and the longer throw lens options, on thebigpicturedvd.com. Go to the forum that they have specifically set up for the 10HT.