Here are two beautiful open clusters in Gemini - M35 and NGC 2158.
http://www.astropix.com/M35.html
Click on the link to see a larger version with more information.
It's interesting to note the golden star colors in NGC 2158 compared to the bluer star colors in M35. This is because NGC 2158 is a much older cluster.
I though I would see what I could get out of a single exposure with my new Nikon D5300 DSLR camera.
This is one 10-minute exposure at ISO 200 at f/6.3 with my AP 130EDFGT refractor at 825mm of focal length.
The big thing about the D5300 is it's low readout noise at low ISO. This gives the camera a large dynamic range and the ability to better hold star colors in the highlights at long exposures because a low ISO can be used.