GSO Ritchey-Chretien 152mm f/9 with metal tube and SESTO SENSO: main features
GSO 203mm f/8 RC telescope with metal tube is perfect for those looking for a quality telescope for deep-sky astrophotography at an incredible price. Designed to fully illuminate even the largest sensors (up to FullFrame 24x36mm), it has a corrected field for sensors up to APS-C and offers an optional field flattener for sensors up to FullFrame.
- GSO telescope is a Ritchey-Chretien 152mm f/9 with metal tube
- SESTO SENSO 3 is the best robotic focusing motor, great both for visual use and astrophotography
GSO Ritchey-Chretien 152mm f/9 with metal tube and SESTO SENSO: the advantages
The GSO is a true Ritchey-Chrétien reflector telescope. Contrary to Maksutovs or Schmidt-Cassegrains which have spherical mirrors and need image correctors, and contrary to Newtonians that need coma correctors, the RC system is a well corrected photographical instrument that uses only mirrors (no false colour!) and does not require any corrector with many cameras. The RC is a true reflection system without lens corrector and with a really bright image. The RC has a concave hyperbolical primary mirror and a convex hyperbolical secondary mirror. The resulting image correction throughout the field as well as the sharpness on the optical axis are superior to other telescopes. Both mirrors are ground and polished under pricision computer control to diffraction-limited or better surface accuracy. Most similar telescopes have a movable primary mirror cell. When focusing the telescope the entire mirror is moved. Unfortunately this technique invariably leads to a certain amount of image shift. Most manufacturers have controlled this problem to a fair extent, but the remaining image shift can be quite distracting for astro-imaging, particularly with cameras with a small sensor size or when taking series of frames with several hours of total exposure time. In the GSO RC the mirror sits in a fixed mirror cell and focus is changed with a separate focuser. This eliminates the problem of image shift completely.
GSO Ritchey-Chretien 152mm f/9 with metal tube and SESTO SENSO and the following optional accessories: EAGLE with PLUS dovetail clamp and guide scope installed above the telescope, ECCO environmental module.
SESTO SENSO 3: the most advanced robotic focusing motor!
This special version of the GSO Ritchey-Chretien 152mm f/9 adds SESTO SENSO 3 — our most advanced robotic focusing motor for rack-and-pinion or Crayford-style focusers, combining high precision, flexibility, and ease of use in a compact Made in Italy design. Connect it to the USB-C port of your EAGLE or Windows® computer to electronically control focus while still allowing you to manually move the focuser without losing position, thanks to the integrated encoder with Automatic Position Recovery. If you prefer wireless operation, you can control it from any smartphone or tablet through the built-in WiFi using the Virtual HandPad interface. The new Self Centering Clamp 2 (SCC2) allows fast and precise installation on many focusers without the need for external brackets or adapters. With its 0.7 micron per step resolution, SESTO SENSO 3 provides extremely accurate and vibration-free focusing — perfect for both visual observation and astrophotography. You can also expand SESTO SENSO 3’s capabilities by adding the ARCO robotic camera rotator, for a fully motorized imaging setup.
GSO Ritchey-Chretien 152mm f/9 with metal tube and SESTO SENSO: scope of delivery
- Optical tube Ritchey-Chretien 152mm f/9
- Metal tube
- 2" Crayford focuser with fine focus and 31,8mm reducer
- SESTO SENSO 3 robotic focusing motor
- Vixen dovetail bar
