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Mask test .9
Here is a quick test of the .9mm mask
as you can see its through a kitchen window
canon EOS 60d 18-135mm lens
this image was at 135mm
it works at 18mm not as good but still highly usable
My view the .9mm pitch is perfect as it lets more light through for dimmer objects. the other mask worked but hard to see light
oh PS this was a street light about 1.5km's away
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