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M 16  (NGC 6611),  The  Eagle  Nebula,  in  Serpens

Click Here For Higher Resolution Image

Inspired by John Gleason's amazing black & white images taken with a narrow-band H-alpha filter, I placed an order in April 2002 for a similar filter. Apparently everyone else did too because after two months, I still haven't received my filter. I happened to have an old, broader H-alpha filter, so I used that for some exploratory images. The image posted here is a combination of the H-alpha frames plus some taken with an IDAS light pollution -reduction filter, plus some more taken with no filter. Direct comparison of all three setups shows that the stars are definitely tighter with the H-alpha filter. Those interested in the lens-induced spikes that are a property of the "ME" Kodak CCD sensors ("M" stands for "microlensing") can see them on the higher resolution image here (226 KB file).  A more recent L (Ha + red) RGB image can be seen here. A still more recent, and wider, view can be seen here.

M16, the Eagle Nebula, is famous for a Hubble photograph ("Pillars of Creation")  that shows a star-birthing region. This emission nebula lies approximately 7000 light years from us.  A color image on film can be seen here.

 Date  2002-06-09 and -10
 Scope  Astro-Physics 130 f6 EDF  with ST-10-XME CCD camera. Guiding with ST-10 guide chip.    
 Exposure

 17 x 5 min with Lumicon broad H-alpha filter; 10 x 5 min with Idas LPR filter; and 

 10 x 5 min with no filter; total 185 minutes.

 Processing  

 Stacked in MaxIm and Registar; brightness and histogram adjustments in AIP4WIN; stretched 

 in PhotoShop; and smoothed with SGBNR    

 

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