>> 2) How effective are filters that claim to block out mercury vapor
>> light in city settings ?

Very poor, IMHO. I have one but never use it. If you're trying to see
faint deep sky objects then go to a dark site. In the city, stick with the
solar system :)

> Check out my minimalist ovservatory (Destert Storm
>Aluminizez Mylar plastic bag with 25 watt light bulb to keep interior
>above dewpoint.)

Is the light really necessary?

>I can be using the scope within 2 minutes of making the
>decision to do so!.

I have recently built a permanet mount, too, though it is nothing as fancy
as Frank's:
http://www.seds.org/billa/obs/tem.html
Since I use altaz mode (no imaging here :-) I was able to use the smallest
size Desert Storm bag ("A").

It is great to be able to have a quick session without all the hassles of
setting up and tearing down.
---
Bill Arnett "Science is a way of trying
Emerald Hills, CA USA not to fool yourself." -- Feynman

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