Originally posted by fs999 Wonderful shot SKYGZR !
Nice shot Pete_XL ! Thank you for the advice ! Is this a cropped shot ?
Thank you! Yes ist was cropped. I used 2 x drizzle in Deepskystacker and the cropped (a bit too much...)
Yesterday we had a clear sky her in Westfalia. The following picture of M51 Whirlpool Galaxy ist the smallest and darkest object I think I can reasonably catch with my K5 and equipment. Nevertheless, since it was made in my backyard under a lightpolluted sky I like it anyway.
(76 shots per 15 secs with K5, O-GPS1, Sigma 70-200 mm, at 200 mm, ISO 3200, F3.5, Deepstystacker with 3x drizzle)
---------- Post added 04-16-15 at 18:56 ----------
By the way......I loaded the pictures of the last O-GPS1-session with M51 into Geosetter.
And there you see, what the limitations of the system are. The declination and the gps coordinates vary heavily. Standpoint drifts about 15 meters. Though you have to subtract some degrees of variation because I followed the galaxie you see that the declination shifts from picture to picture (see transparant area that represents the field of view at 200 mm focal length). I fear that the inclination angle varies too. That is why I get startrails exposing longer than 15 seconds at 200 mm.
But: O-GPS1 gives me about 10 x more exposure time and that is why I love it!