Skywatcher Explorer 130 vs 130p
Wednesday, 13 December 2017 | Admin
Both have the same 130mm (5") aperture and are supplied the same EQ2 mount but the 130 has a longer (f7) tube length which enables the use of a spherical mirror. Spherical mirrors are relatively easy (cheaper) to manufacture to a high standard.
The Explorer 130p has a shorter (f5) tube length, which results in a shorter cone of light with steeper sides. Short light cones require a more sophisticated (expensive!) parabolic mirror.
For visual astronomy the 130 (or 130M with tracking motor) with it's longer tube is arguably the best choice. The views are very nice and the longer tube length makes it easier to achieve the higher magnifications often used when observing the lunar surface, planets and binary stars. It is also cheaper!
For astrophotography the 130p is the best choice because its shorter tube results in shorter exposure times. The 130p also has slimmer spider-vanes (they hold the secondary mirror) so contrast is a little higher and diffraction spikes less prominent. The 130p's smaller size also makes it less likely to act like a sail in a breeze and a little easier to store.
For visual astronomy, buy the 130.
For a mix of visual and astrophotography, buy the 130p.