What we see in these pictures are mostly craters that were flooded with lava, and only their rim survived. They are located on a stretched plateau called Mare Nubium. Of those listed are Guericke, Parry (48 km), Opelt and Davy (35 km). It retains the look circular, but with some breaks or loops.
For example, Guericke (58 km), situated on the northern Mare Nubium, shows two walls of interruptions: one to the north, which contains a lane, and one to the east. Images are upside down, as shown through telescope and cardinal points described in this article do not take into account this.
Guericke's west, is a small crater that would not be so obviously, if it was not placed isolated on Mare Nubium and so therefore was given to it a separate name. This is called Kundt (11 km).
An interesting crater is observed only in the first image, a crater with the eastern edge almost completely flooded (top right photo). This is Opelt (49 km) and the "mountain" chain below that normally is at it's north, is Rimae Opelt.
Phase: 70.5% (0% = New, 100% = Full)
Distance: 399.221 km
Optics: Celestron C8-Newtonian telescope, 20mm Plossl, 2x barlow
Mount: CG5 (EQ5)
Camera: Sony CX130
Location: Baia Mare, Romania
Processing: FastStone Image Viewer