What is the purpose of the IMP85 Adapter S120a to IR90 Focuser?
This adapter's sole purpose is to provide a secure, precise mechanical connection between the IMP85 multi-port instrument selector and a telescope that uses an IR90 focuser. It is a required component to integrate the IMP85 system with this specific focuser type.
Does this IMP85 adapter come with the IMP85 instrument selector itself?
No. The IMP85 instrument selector is sold separately. The IMP85 system is modular, requiring specific adapters like this one to match the telescope-side connection (your focuser) and the camera-side connections for your various instruments.
How does the IMP85 system, used with this adapter, benefit a remote observatory?
For a remote observatory, the IMP85 system allows you to permanently mount multiple instruments, such as a deep-sky astro camera, a high-speed planetary camera, and a spectrograph. You can switch between them electronically without needing on-site staff to reconfigure the telescope, maximizing your available imaging time.
Can I use the IMP85 Adapter S120a for visual observing at a public observatory?
Yes. A major benefit for public observatories is the ability to leave a complex imaging camera on the main, straight-through port while having an eyepiece on a secondary, mirrored port. You can instantly switch from imaging to visual observing for guests without touching the primary camera setup, and switch back for data acquisition just as quickly after the tour ends.
What is the advantage of the IMP85's non-mirrored main port?
The central port on the IMP85 is a direct, straight-through light path. Unlike other designs that use a rotating central mirror, this ensures 100% of the light from the telescope reaches your primary camera with no intervening optics. This maximizes signal and maintains the highest possible image quality.
Are other adapters available for the IMP85 instrument selector?
Yes. The IMP85 is designed as a versatile system with a wide range of available adapters for both the telescope side (to connect to different focusers) and the camera side (to connect to different imaging systems). This S120a to IR90 adapter is one specific part of that ecosystem.
