[Aavso-photometry] Which Photometry Filters to Begin With ?

[Wolfgang Renz]

Hi Steward

There is much to say about imaging with filters and its difficult
to say all and to go into details without writing a book. Whenever
I read my response, I wanted to add an other one or two sentences
like:

Some vars might be just well observable in Ic (and maybe Rc but
not in UBV) due to severe interstellar reddening/extinction (see e.g.
the Mira stars with just JHKLMN mags in the GCVS or the current
QX Pup campaign).

Clear skies
 Wolfgang

-- 
Wolfgang Renz, Karlsruhe, Germany
Rz.BAV = WRe.vsnet = RWG.AAVSO