The telescope manufacturer William Optics offers very high-quality apochromatic and achromatic refractors which are very well suited to visual observation, and especially to astrophotography.
William Optics
Diagonal prism RedCat 90° 1,25"
$ 199.00
ready for shipping in 24
h
William Optics
Diagonal prism Cat 51 WIFD 90° 1.25"
$ 199.00
ready for shipping in 1-2
weeks