Brogan
Distinguished Member
As the title really.
I'm just about ready to mount my 7210 on the ceiling and was wondering which is the optimum position.
I can mount it anywhere from 3.92m to 4.88m from the screen to get an image 234cm wide x 132cm high.
If I mount it at 3.92 I will have to zoom to the maximum of 1.25.
If I mount it at 4.88 there will be no zoom, it will be at 1.0.
So, is there any difference between the two extremes?
Coming from a photography background, different lenses behave differently at different zoom lengths in terms of image quality, etc.
Ideally of course a fixed aperture would be best but this is not the case with the 7210 lens - it is a Carl Zeiss lens and ranges from F2.7 (wide) to F3.1 (tele).
I presume wide is with the zoom wheel at 1.0 and tele is maximum zoom?
At F2.7 I would expect this would give the brightest image and therefore I wouldn't need to increase the brightness on the PJ thereby saving the life of the bulb, reducing heat, fan noise, etc.
However at F3.1 the image may well be better quality.
Certainly with some lenses in the photography world you get better quality if the lens isn't wide open and you take it down a couple of steps.
So does anyone know or am I reading too much into it?
I'm just about ready to mount my 7210 on the ceiling and was wondering which is the optimum position.
I can mount it anywhere from 3.92m to 4.88m from the screen to get an image 234cm wide x 132cm high.
If I mount it at 3.92 I will have to zoom to the maximum of 1.25.
If I mount it at 4.88 there will be no zoom, it will be at 1.0.
So, is there any difference between the two extremes?
Coming from a photography background, different lenses behave differently at different zoom lengths in terms of image quality, etc.
Ideally of course a fixed aperture would be best but this is not the case with the 7210 lens - it is a Carl Zeiss lens and ranges from F2.7 (wide) to F3.1 (tele).
I presume wide is with the zoom wheel at 1.0 and tele is maximum zoom?
At F2.7 I would expect this would give the brightest image and therefore I wouldn't need to increase the brightness on the PJ thereby saving the life of the bulb, reducing heat, fan noise, etc.
However at F3.1 the image may well be better quality.
Certainly with some lenses in the photography world you get better quality if the lens isn't wide open and you take it down a couple of steps.
So does anyone know or am I reading too much into it?