Hello,
Here is another view of the Neptune – Triton system, this time with the Mewlon 180 and a 2 inch WO x2.5 Barlow, giving an effective focal length of 5400mm at F30. To record anything, I had to expose the ST7 sub frames for 60 seconds and at this image scale, I only managed to cull some 11 frames from the set of 60 recorded.
I used various Noel Carboni “Actions” in CS3 to tidy up the appearance of Neptune, Triton and the field stars to make the result a little more pictorial.
I don’t think I’ll go back tonight and record some more frames in order to reveal the orbit of Triton around Neptune (approx. 5 days) – it’s just way too much hard work for this fun hobby!
It was interesting to see that the ST7 was able to pull in mag 15 stars even at this crazy focal length!
Cheers
Dennis