Re: [ap-gto] A nice surprise: Baader 7nm Ha filter ~$325/50mm


Mar 20, 2007

 


----------------------------

#17516 Mar 20, 2007

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)



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

www.narrowbandimaging.com/m82_mk1sn2_cm10_geg_baader_ha_page.ht

m



Crab:

www.narrowbandimaging.com/m1_mk1sn2_cm10_geg_baader_ha_page.htm



----------------------------

#17517 Mar 21, 2007

Richard, great to see a post from you - both look great! I think pushing the envelope on M82 is really going to bring home new aspects of that target. M1 of course is always a favourite.



Stuart ----- Original Message -----

From: Richard Crisp

To: ap-gto@yahoogroups.com

Sent: Wednesday, March 21, 2007 12:44 AM

Subject: [ap-gto] A nice surprise: Baader 7nm Ha filter ~$325/50mm





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)



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

www.narrowbandimaging.com/m82_mk1sn2_cm10_geg_baader_ha_page.ht

m



Crab:

www.narrowbandimaging.com/m1_mk1sn2_cm10_geg_baader_ha_page.htm











[Non-text portions of this message have been removed]



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