[Allan]

I was originally going to pick up a SQM-L to measure the brightness of my observing sites, but the more I think about it, I feel that this is the wrong meter to buy. The lens permits sampling of only around 20 degrees of sky in the SQM-L. So pointed at zenith , it is possible the meter will show a dark site and a less than dark site as being reasonably similiar. Multiple readings around the sky will be required with the SQM-L to indicate the true brightness of the sky. This IMO would make the SQM-L a pain to use.

So I am thinking now that the standard SQM is the better option as it measures around 80 degrees of sky, so provides a truer indication of the overall brightness of an observing site, not just a point in the sky. Only one reading would be required with the meter pointed at zenith, and this will give a more accurate indication from site to site as to which is darker.

I would be interested to hear from any SQM users, and if your experience backs up my argument. Cheers