Spectroscopic flats

Forums Spectroscopy Flats (2);-) Spectroscopic flats

Robin Leadbeater

Is this for spectroscopy?  If so you can’t use twilight or LEDs.  You need a light source with a smooth spectrum with no features. 

EDIT: you might be able to get away with LEDs in some parts of the wavelength range in higher resolution spectroscopy but I dont know of any LEDs which have a smooth enough spectrum or wide enough wavelength coverage for the ALPY for example