Moon exploration with the 180mm Maksutov

5 times Vallis Schröteri and the crater Herodotus

5000 frames 20% stacked ASI290mm with a Baader Green filter
5000 frames 20% stacked ASI290mm with a Baader Red filter
5000 frames 20% stacked ASI290mm with a Baader Red filter second round
5000 frames 20% stacked ASI290mm with a Baader Red filter third round
5000 frames 20% stacked ASI290mm with a Baader IR filter
20000 frames 5% stacked ASI290mm with a Baader IR filter

The out-of-focus star test of the Mak during the imaging session of tonight. A slight de-centering is noticeable, as well as a thermal chimney 10 seconds stacked.

Unidentified

300mm F2.8 Nikkor

This lens is a beauty and has been since long on my wishlist. The initial tests indicate some slight defocus on the left side of the image ( at F2.8). But sharp enough overall and especially in the centre. The intended use of this lens is to exploit it’s fast F/Ratio: fast comet imaging with the Nikon D750 / Large Milky Way or nebula complexes with the Nikon D750 and narrow band imaging with the ASI183mm.

Some test shots (unguided)

Crop of the rising Moon 300mm F2.8 Nikkor @ F4
M57 6 x 30″ on ISO400 @ F2.8, slightly cropped ; no guiding on an EQ8