[Atmos (Colin)]

[QUOTE=gregbradley;1468112]

Originally Posted by Atmos

Well, this nebula is what I might call my standard candle, it’s the one I’ve shot with every telescope and every camera I’ve owned

"Standard Candle" has an astronomical definition:

https://www.bing.com/search?q=standa...omy&FORM=QSRE1

Sorry being pedantic!

Greg.

It may have been intentional
I’ve done a fair bit of research into RR Lyrae Cepheids, using them to calculate the distance to a few globular clusters with my old trusty Nikon D700 and Meade 10 LX200