Re: [NTLK] Red Backlights for Astronomy

For the record, I suggested using a white backlight with a red filter. This
can easily be accomplished during the intallation of a white backlight -
however, it wouldn't be easy to switch back and forth between the fltered
and unfiltered versions.
On 10/18/06, Roland Roberts <roland@astrofoto.org> wrote:
>
> >>>>> "Adam" == Adam Goddard <pashosh@tpg.com.au> writes:
>
> Adam> Mr Grier(owner of adago.net) just replied and suggested using
> Adam> a red filter as well. Power for led lighting is no problem,
> Adam> and will probably be easiest and cheapest way to do this, but
> Adam> I just thought it'd be cool to have a dedicated "Red
> Adam> Newt". :-) I'll look into some options on filters at some
> Adam> point in time.
>
> Red filters are not likely to work very well due to a lack of overlap in
> the spectral range of the green backlight and the bandpass of the red
> filter. With my laptop and a ruby red acrylic cover which I use for
> astronomy, blue completely disappears (no surprise) and green is very
> hard to see. Red works quite well (again, no surprise) as does white.
>
> Red LEDs shining on the Newton might work okay. The native green is
> rather blinding at night. If you use your telescope in the field were
> dew is an issue, try putting it in a cardboard box lying on its side so
> you access the box from the side. This helps to inhibit dew on the
> Newton.
>
> regards,
>
> roland
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> roland@rlenter.com 6818 Madeline Court
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>

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