I need to purchase this Varifocal 4-Element Projection Lens
or does any1 have other suggestion.
I dont know how to judge what lens i need.
My throw dist. is 8ft from my wall to the table im projecting on.
The screen size is 8ft diag.
Now all I need to do is find what lens i need
also why cant i use a passive matrix lcd, i cant find much on it
or does any1 have other suggestion.
I dont know how to judge what lens i need.
My throw dist. is 8ft from my wall to the table im projecting on.
The screen size is 8ft diag.
Now all I need to do is find what lens i need
also why cant i use a passive matrix lcd, i cant find much on it
passive matrix LCD
These have very bad performance, like low contrast ratio and slow response. Use a TFT active matrix LCD with a built-in controller. Like an LCD computer monitor. You can get new 14" LCD monitors for around $150 US.
Your lens focal length will depend on the size of your LCD, but an 8 foot image from an 8 foot distance is near what an overhead projector does.
These have very bad performance, like low contrast ratio and slow response. Use a TFT active matrix LCD with a built-in controller. Like an LCD computer monitor. You can get new 14" LCD monitors for around $150 US.
Your lens focal length will depend on the size of your LCD, but an 8 foot image from an 8 foot distance is near what an overhead projector does.
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