However, this weekend I decided to check if I still remembered how to do this. This time I just did a rough alignment of the mount (NEQ-5) and shot with my Nikon D3100 DSLR without the ETX-70, just with my Sigma 18-50 f2.8 which is way more forgiving with the star trails than the 300mm. This means that this image is not from a specific object but from a wide area of the sky which spans 26.5 x 17.4 degrees.
I aimed high in the sky to avoid light pollution since I was near cities and villages and I was just trying to keep it simple. Around there, close to the cenit, was the summer constellation of Cygnus, right in the path of the Milky Way. This region is packed with objects and stars although this time astrometry is not tagging my nebulas for some reason but, some of the objects you can see are: North America nebula (NGC 7000) south to the brightest start Deneb, close to it it is the Pelican nebula (IC 5067). Close to the second brightest star, Sadr, are the Butterfly nebula (IC1318) and the Crescent Nebula, next to the right margin, near Gienah, is the Veil nebula, which I already pictured with the ETX-70 here and here.
The annotated image for reference:
Replying to +Diego Blanco in the comment section, since I can not upload images in the comments, here's a single light frame processed to represent what I was able to see with the naked eye: