Hi Robert!
Glad I understood you. No need for any further apologies regarding
your writing -- we do understand and that's all that matters, isn't
it? Note that a sky in the city, say 5.5 mag overhead, shows
substantially less than the data I gave you for nearly perfect skies.
In the city, you see 1.5 to 2.0 magnitudes less than what I wrote
both for galaxies and for stars. Also, any moon or haze at all, and
you see even less again. I guess you must already know all that, so I
include it here only in case beginners are reading this eMail group,
Robert. Best of luck on your choices...
Later
Roland
