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Suzy
My backyard is not as dark as I would like, streetlights and some light from living room etc, and on bad nights the neighbours have a floodlight on!
But I find if I am careful and avoid looking directly at them the effect is minimal on my vision. Main effect is if my scope is lined up near a light source I get some stray light in the image.
The problem with using a lapyop is you have to look at it when using it and it is bright enough to affect my vision. I have tried dimming it wil red coverings, got a red screen computer program etc, but I still find it almost impossible to use if I want to observe.
I have an iPad with a couple of programs that have a dim red mode, even those I find hard to use. I is worth remembering that while red light is better than white light, DIM red light is best of all. Those red headlamps that you can buy at Safeway are still way too bright for effective use IMHO.
Malcolm
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