Baader Planetarium Baader FCCT 1 Filter Holder for RASA 8" & 77mm QHY Cameras

The Baader FCCT 1 is a specialized filter holder. It is designed to let you use imaging filters with specific 77mm diameter QHY cameras on a Celestron RASA 8" astrograph, an instrument that cannot accommodate a standard filter wheel due to its extremely critical back focus.

This holder is designed for QHY cameras that have a 77mm diameter cylindrical body. This includes popular models such as the QHY174, QHY163, and QHY183. You should always measure your camera body to confirm its diameter before purchasing.

The RASA 8 has an extremely short and precise back focus distance. A standard filter wheel is too thick and would place the camera sensor far outside the telescope's focal plane, making it impossible to achieve a sharp image across the field. The FCCT 1 is a thin, integrated solution that works within this critical constraint.

Yes, this is an ideal application for the FCCT 1. It allows you to insert narrowband filters (like H-alpha or OIII) into the RASA 8's optical path, enabling you to capture high-contrast images of emission nebulae like the Orion Nebula (M42) even from light-polluted locations.

The FCCT 1 lets you create a full-color LRGB image of broadband targets like the Andromeda Galaxy (M31). It provides the means to insert and swap Luminance, Red, Green, and Blue filters to capture separate channels, which can then be combined during processing to produce a detailed color photograph.

The provided specifications do not list the compatible filter size or type (e.g., mounted or unmounted). This information is crucial for proper operation, and you should confirm the required filter specifications from the manufacturer before purchase.