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
Adapter Flat68II / Flat7A
$ 69.00
ready for shipping in 3-5
weeks
William Optics
Universal (DC + DV) digital camera adapter lense 75mm
$ 109.00
ready for shipping in 24
h