The apochromatic refractor with 130 mm aperture and 910 mm focal length offers highest optical performance and first-class mechanics for astrophotography and amateur astronomy
The apochromatic refractor with 70 mm aperture and 420 mm focal length offers highest optical and mechanical performance for astrophotography and amateur astronomy
The apochromatic refractor with 80 mm aperture and 480 mm focal length offers highest optical and mechanical performance for astrophotography and amateur astronomy
The apochromatic refractor with 90 mm aperture and 540 mm focal length offers highest optical and mechanical performance for astrophotography and amateur astronomy