ASTRO: First light tests, Baader 7nm Halpha filter (50.8mm)

I recently got a chance to use my new 50.8mm Baader Planetarium 7nm
Ha filter. It works great and what a deal at about $325 based on
current exchange rates.

I shot two images with it on Thursday night last week in so so
seeing: one of The Crab (4 x 30 minutes) and one of M82 ( 5 x 30
minutes). All were shot with the home built 18" f/12.6 classical cass
on the Ca 2000 AP1200GTO using the CM10 camera with focal reducer
(F=3366mm approx).

Next tests will be on the AP180EDT refractor, but I have a few more
long focal length targets to use them with for now.

I really like the initial results. The images aren't so amazing in
terms of sharpness, hard to do that in 4+" seeing, but the filters
work really well, especially for the money.

As I understand it they have dual cavity construction which provides
a higher "Q" that single cavity/colored glass designs. But they are
priced very attractively, presumably because Baader makes them in-
house.

Anyway, I am jazzed to see such a nice product for such a low price.
As I understand it they will be producing 50MM square ones too for
the new big format sensors and I was told they would also be priced
aggressively, but I am not sure of the price.

Here are the images:


my favorite of the two, M82
http://www.narrowbandimaging.com/m82...er_ha_page.htm

Crab:
http://www.narrowbandimaging.com/m1_...er_ha_page.htm