m042_dsi2-1x8.5sec_4x6sec_70.jpg
M42 - Orion Nebula
Taken with Orion Transporter 70mm f/5.0 Achro with 0.33 SAC reducer (takes it to f/1.7) on AP1200 mount unguided. Image is a four 6 sec images and one 8.5 sec image taken with a DSI2Color that I had just won at a raffle. It was first light for the AP1200 and the DSI2 camera.
The extensive amount of purple hue around the stars is a good example of why you'd want to use an Apochromatic scope instead of an Achromatic scope. The little Transporter f/5.0 scope is really cheap $100 spotting scope with a very short tube. The shortness of the optical path combined with the SAC 0.33 reducer really worsens this effect.
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