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Here are some images taken with my digital SLR
camera, a Sony
DSLR-A300. The images have not been "doctored" in any way. Click on images to enlarge.
The settings for the camera were as follows.....
shutter speed = 1/4 sec
aperture = f3.20
exposure = 5
focal length = 75mm
iso = 200
flash = none
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DIY Projection
Screen Page
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I have finally finished my DIY screen. It is a 96”
diagonal, 16x9 screen with 2.5” bordering all around. The screen material is
somewhat similar in colour to what is used on the Stewart Firehawk with a gain
>1.0 and <1.5. I had tried various Behr gray and silver paints but did not
achieve the success that my final paint selection did. My main concerns were to
boost black levels for the image projected by my LCD projector (Sony 11HT),
provide protection from off axis ambient light, and not “colour” the image.
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The Screen - Up
close & personal
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I used a sheet of 49” x 84.5" sheet
of formica for the screen surface which I spray painted with “Tremco – Tremclad
High Heat Enamel - Aluminium”. This paint when dried, provided a nice matte
silver/gray surface. I used 3 cans to provide 5 even coats over the screen. For
the border material, I used “slot board” which is available in 4x8ft sheets, and
sliced 3” lengths off. The slot/groove in each length of board is what holds the
screen in place. I painted the borders flat black with Tremco flat black spray
paint and then applied a single layer of super-wide velcro. I have found that
this material was the best for blocking out any light spillover on the sides of
the image. NOTE that the slotted border overlaps the formica screen by 1/2" on
all sides so the final screen size is 48" x 83.5".
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I could not be happier with the
results. The total cost for the project was about cdn$130 including excess wood
that was not even needed.
The first things I noticed about the projected image were the following… Whites
appeared slightly brighter as compared to the image projected onto the wall,
hence my estimate of gain between 1.0 and 1.5. Colours appeared deeper as well.
Also, I could turn on the lights in the room and the image would not wash out as
much as it would prior to having the screen and using a white wall instead.
Finally, I also painted the front wall in a flat black. This really made the
image stand out and improved things by reducing the amount of light reflected on
the front wall and back to the viewer. The perceived contrast ratio was again
improved as a result. I also painted the side walls in an oat-straw colour...
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