M 13 New image

 

another shot at my favorite test subject this spring... this time, 45 x 60 seconds at f6.8, using the meade FFFR with the short coupling tube that came with the
AGII from Baader. There is the expected residual coma inherent in this reducer, but the overall field is a bit flatter. I think 60 second subs are perfect for this bright object
and theHap modified 350d, keeping star color through the entire image.. In an attempt to compensate for the automatic stuff that Canon throws at us, I used a master flat
that is the square root of the 20 frame dusk flat. It is still slightly over compansated on the right edge, but is much beter than any earlier attempts. Also, the master dark
was scaled to match the lights. Thanks to the infinite patience of Craig Stark for working with me on this..

12-inch Meade LX 200 Classic at f6.8, Hap mod 350d, acquired, calibrated, aligned and stacked using standard deviation, color corrected, DDP'd and curved in Nebulosity 2b3,
Post processed ( crop, background adjst, slight noise ninja , jpeg) in Photoshop CS3

Guided by PHD using DSI ProI on an antique 80mm Meade refractor, homemade flexi piggyback thing..

enjoy