Thanks Allan!
I've been sketching since I was knee high to a grass hopper. But sketching white onto black paper at the eyepiece only a couple of years. I wrote an article on how I sketch DSO's that
you can find here in this link. How long depends on the object. Take the galaxy below of 1365 - it took only 30min. Other sketches can take upto three hours, all done at the eyepiece.
If you would like a more detailed explanation of the sketches, you'll find them all in the
Solar System and DSO sketching sticky. My lunar sketches you'll find in the
Sketch the Moon night sticky. My lunar sketches started as black onto white paper. But I found I got better results when I used the exact same materials I use with my DSO work. One kit, two very different uses.
The technique I use for DSO's I learnt from my late friend Scott Mellish, after whom I named the technique I wrote the article of. My lunar work is my own.
If you have any questions, please just ask. You can post them in the
Sketching Tips sticky or you can PM me.
I've actually just come in from doing a sketch of the Moon tonight which I'll post in the next day or so. I'm too tired now to clean it up and photograph it. Need some sleep now...
Mental.