M87 and Markarian's Chain Region, 200mm Canon FD lens

All Images Copyright Steve Cannistra

Magnitude:  varies with galaxy
Size: FOV is 4.2 x 2.9 degrees
Distance: varies with galaxy
RA: 12h 30.8m
Dec: +12 degrees 24'

This is only a 25 minute exposure obtained through a thin layer of clouds.  But it's first light for my 200mm Canon FD lens (f2.8) coupled to my Maxcam CM10 using a very thin profile homemade adapter (details to follow).  With the CM10, this lens gives me a FOV of 4.2 degrees x 2.9 degrees and an image scale (measured) of 7.1 arcsec/pixel.  This compares to a FOV of 3.9 degrees x 2.6 degrees with an FSQ106 plus an STL11000, but admittedly that set up would yield an image scale of 3.5 arcsec/pixel.  Since I paid only $150.00 for this wonderful Canon lens on E-Bay (the stars show very little coma with the lens open wide at f2.8), and about $35.00 in parts to make the adapter, I am willing to sacrifice some resolution at 7.1 arcsec/pixel without investing in another scope and camera at the moment!  Not to mention the fact that the STL11000 cannot touch the CM10 when it comes to QE, especially in the Ha range.

Photographic Details:

Date:  May 28, 2006.
Canon 200mm (f2.8) FD lens, coupled to the Maxcam CM10 with a homemade adapter (details to follow) and mounted to the G11. 
Autoguider:  SBIG STV with e-finder.
Camera:  Maxcam CM10
Astronomik clear filter.
Exposures:  25 minutes at f2.8, unbinned (5 x 5' subs unbinned), manually focused.
Conditions:  Temperature 65 degrees F; terrible transparency with thin clouds invading the area and Arcturus winking in and out.
Debloomed, calibrated, aligned, and median combined in Maxim.  Levels and curves in Photoshop CS (16 bit format), with a touch of smoothing using Noise Ninja, which I almost never use (needed due to the increased noise in this short exposure).  Not a lot of effort spent on this (yes, it shows), but it provides proof of principle.  I intend to have a lot of fun with this lens later in nebula season.

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