Astrophotographically optimized lens telescopes (astrographs) consist either of primary optics, combined with a flattener or reducer, or of multi-part (4 to 6 lens) optical designs that enable optimal geometric and chromatic correction. The focal ratio is very short (mostly f / 3.5 - f / 5.6), which shortens the exposure times.
The largest apo from Teleskop-Service is the inexpensive entry into the world of really big refractors. Such a telescope offers joy for a lifetime and is an attraction in every observatory.
4958.00 €
Estimated delivery time : 1-4 days (valid for new orders)
From the beginning, the goal was to create the best possible design for an affordable, small, lightweight, and fast Apochromatic refactor for astrophotography.
Characteristics:
4 lens Petzval optical design
Aperture 51mm, focal lenght 250mm, f/4.9
Massive OTA from Aluminum alloy
Compact and ultra portable
Field rotator
Helical focuser design
Tilting platform
Field illumination even for full frame sensors
999.00 €949.05 €
Estimated delivery time : 1-4 weeks (valid for new orders)
The William Optics Ultra-Cat 131 · 30th Anniversary Limited Edition is an instrument for those who not only want to observe, but also want to hold history in their hands. This anniversary model combines the technical maturity of three decades of William Optics development with an aesthetic that will make collectors' hearts beat faster. The combination of a five-element Petzval design, Super ED glass and precise mechanical workmanship makes it one of the most powerful compact astrographs in its class
6608.00 €6277.60 €
Estimated delivery time : 3-4 weeks (valid for new orders)