Many years ago I had a skywatcher 150mm F/8 achromat refractor and found it to be very good at low powers for deep sky objects.
It was OK on the Moon at x100 but did show some Chromatic aberration.
At x190 to x200 for the planets it showed strong colour smearing and the image started to get soft, a CA filter helped a little but a light yellow filter was better and cheaper but the yellow cast was off-putting.
It was a beast to mount - a Vixen GPDX was not enough so ideally an EQ6 may be needed for high powers.
It was beaten in all areas by my equatorially mounted Skywatcher 8” F/6 Newtonian - with Apochromatic views.
Perhaps a modern alternative could be the GSO 8” Classical Cassegrain.