2 versions of M45

I imaged M45 recently plus I imaged it around this time last year with the same scope (Tak BRC250 and Baader LRGB)

Latest was taken with a FLI PL16803 and last years was with an Apogee U16M (Astronomik LRGB) so they
are the same size image.

Here is the latest version:

LRGB 50 60 40 40:

http://upload.pbase.com/gregbradley/image/118087346/original

Last years and this one combined:

LRGB 110 90 70 70:

http://upload.pbase.com/image/118087554

FWHM figures were much much lower in the latest version like 1.7 to 2.2.
Whereas the earlier year its more like 6-9FWHM. Perhaps I hadn't yet installed
the FLI PDF when I took last years image and the focus was a touch off but
I see the Baaders have less reflections than the Astronomiks so perhaps it is
more to do with the filters?

No doubt the seeing was also better but not by that sort of factor.

Greg.

Greg.

Hi Greg,
I found the Atronomiks had much larger reflections than the Baader and Astrodon GEN2 filters, so I think the filters have a bit to do with it.