Your cart is empty.
Your cart is empty.The new Baader RCC-I (Rowe Coma Corrector) Planetary is specifically designed to correct coma in fast Newtonian imaging systems. The RCC is the ideal complement to today's digital SLR and CCD cameras. Long Back Focus: The optical design of the triplet RCC-I has been optimized to work at the long backfocus distance of 91.7mm, allowing the use of Adaptive Optics off-axis guides and filter wheels. The RCC even allows DSLR users to incorporate off-axis guiding with the Baader RCC off-axis guide. No Magnification Boost: Unlike most other coma correctors, the RCC-I does not impart a Barlow effect - it operates at 1:1 with no loss in frame speed or reduction in field size. Fast Image Speeds: The RCC-I has been optimized for Newtonians with focal ratios of f/3.5 to f/6 (nominally designed for f/4). Ease of Focusing: The addition of the RCC-I to the optical train extends the focal point slightly (approximately 0.197" on an f/4 system). This important attribute ensures that your system will be able to achieve focus without needing to change the primary mirror or increase the size of the secondary mirror (of course, this assumes your system will already achieve focus without the RCC). The RCC-I slots into 2 focusers and has external T-threads on the camera side for attachment to any other T-threaded accessory. The RCC-I also includes a removable stop flange. Removing this flange allows the RCC to be fully inserted into 2" focusers. The RCC is also threaded for standard 2"/48mm filters. The RCC is designed for a nominal distance of 3.602" from the mounting flange to the image plane (2.165" is the standard dimension for all SLRs measured from the front of their T-adapter to their image plane). The 91mm distance should be kept within +/-0.118" for best image quality. We sell a range of adapters and extension tubes that can be used to configure virtually any imaging system to meet the 91mm requirement. In particular, we recommend the Baader VariLock variable extension tubes.