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Discussion Starter · #1 ·
I have seen the TD=1.49xW+4.8" calculation for a 4x3 aspect ratio but need to know what a 16x9 calculation is...


I saw reference to 1.25xscreen width but want confirmation before going too far down the wrong path.


ALSO, How does one figure picture "height"?


I will not have the ability to mount this beast on the ceiling (rental) so a table mount will be the best I can do. Say the bottom of the lens is 18" off the floor. How does one calculate bottom of thrown image?


Thanks!!!!


Not that it is relivant (I don't think) but I have the ability to go as large as 8' wide or mask down the screen material to a smaller screen as needed.
 

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hi martin, it would be easier if you`d put some info on the lenses u use.

the straight line from the front of the lens to the screen can be calculated with the calculated throw distance * cosinus from the angle of your pj.

mostly this will be 10-15%. but the throw distance is more a trial and error thing just move the pj back and forth to see where the best focus is.

set both adjuster knobs in the middle and move thats all.
 

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Discussion Starter · #3 ·
Sorry... Lens' are GT17s
 

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The best way is to maximize the image on the tube face and then move the PJ to fit your Screen.


Athanasios
 

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Discussion Starter · #5 ·

Quote:
Originally Posted by nashou66 /forum/post/18203520


The best way is to maximize the image on the tube face and then move the PJ to fit your Screen.


Athanasios

I do not dispute that at all... I am looking for a rough idea so that I can plan accordingly. I want to build a screen wall and need a clue as to the placement of the screen (height off the floor and approx how much distance will be between the PJ and the screen). I will have room to adjust a bit but want a ballpark to work from.
 

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Martin


...just do it like Nashou said, And you will have no issues!


That is how I have been dong it for a long time, after all most of us do not like to open the manual and do things their way, at least I don't!


Good luck with your setup and keep us advised


Martin
 
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