Orion nebula from Stuart’s bedroom window
Back to the Orion Nebula (aka M42) again. It’s 1340 light years away and last time we took the big Newtonian telescope all the way to Whitelees Windfarm (9 statute miles away) to see it. This time I used the new Maksutov telescope, and I didn’t leave the house.
The Mak has a longer focal length than the Newtonian, so it magnifies more, but it’s aperture is only 150mm, compared with 200mm, so it’s not much of a ‘light bucket’ and for astrophotography we need longer exposures. Nevertheless when the sky cleared a bit at 05:00 I had a go by walking all the way to Stuart’s bedroom (3 metres). With no sight of the pole star I had to align the mount by dead reckoning and I had to put up with Glasgow’s light pollution. But I was fairly satisfied, and quite surprised, by the result – with a 30s exposure at ISO 3200, and a 150mm x 1800mm Maksutov-Cassegrain telescope: