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Baader Planetarium IMP85 Adapter S120a to FT3.5"

SKU BAA-2451314
Original price CA$363.00 - Original price CA$363.00
Original price
CA$363.00
CA$363.00 - CA$363.00
Current price CA$363.00
Price Match Policy!
  • Three-Port Electronic Instrument Selector
  • Unmirrored, Zero Light-Loss Main Imaging Port (Port 1)
  • Two Mirrored Ports for Ancillary Instruments (Ports 2 & 3)
  • Designed for Remote Observatory Automation
  • Attaches Directly to a 3.5" FeatherTouch Focuser
  • Requires Separate Telescope & Camera Adapters
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty
  • IMP85 Adapter S120a to FT3.5"

    The IMP85 is an electronically controlled 3-port instrument selector designed for direct attachment to a 3.5" FeatherTouch focuser, eliminating the need for manual equipment changes. Developed from remote observatory applications, it allows you to keep a primary deep-sky camera, a planetary camera, and a spectrograph or eyepiece simultaneously mounted and parfocal. This solid, compact unit brings professional-level automation to any advanced imaging setup, ending the cycle of reconfiguring your optical train between sessions.

    Three Instruments, One Focuser: Instant Electronic Switching

    The core function of the IMP85 is to switch between three different instruments at the touch of a button. Once configured, you can move from imaging a galaxy with your main camera to capturing a high-frame-rate video of Jupiter or performing a spectroscopic analysis without ever touching the telescope. This capability transforms observatory workflow, saving critical time and preventing the mechanical risks associated with repeated equipment changes in the dark.

    The Unmirrored Main Imaging Path via Port 1

    Unlike instrument selectors that use a rotating central mirror for all ports, the IMP85 features a unique, unmirrored straight-through light path for its primary port. This design choice ensures that your main imaging camera receives 100% of the incoming light with no degradation from an intervening mirror. It also maintains a stable, symmetrical weight distribution on the focuser, a critical factor for consistent tracking and focusing.

    For the two ancillary ports, the IMP85 electronically inserts two high-quality, fused silica mirrors into the light path. These mirrors redirect the beam with repeatable precision, allowing you to bring secondary instruments into focus as needed.

    Engineered for Remote and Public Observatory Use

    The IMP85 is a direct solution for the challenges of multi-purpose telescope operation. For a remote observatory, it means no longer needing on-site staff to swap instruments, enabling a single telescope to serve multiple research or imaging goals seamlessly. For a public observatory, a guide can switch from a live camera view of an object to an eyepiece for visual observation without dismantling the primary imaging setup—and switch back for serious astrophotography instantly after guests have left.

    Custom Integration for the 3.5" FeatherTouch Focuser

    This version of the IMP85 is built to integrate specifically with a 3.5" FeatherTouch focuser. The system is delivered as a central hub, requiring separate adapters for both the telescope side and the camera/instrument side for all three ports. This modularity allows you to create a rigid, parfocal setup tailored to your exact equipment. The backfocus for each port is clearly defined, simplifying the process of selecting the correct adapters to ensure all instruments reach focus without needing major focuser adjustments.

  • What is the main advantage of the IMP85's unmirrored Port 1?

    The unmirrored, straight-through path of Port 1 is designed for the primary imaging camera. It guarantees maximum light transmission and image contrast by not placing a mirror in the optical path. This also provides superior mechanical stability and balance compared to designs that rely on a central rotating mirror.

    How does the IMP85 selector benefit a remote observatory setup?

    For a remote observatory, the IMP85 provides complete automation of the instrument selection process. An operator can switch between a deep-sky monochrome camera, a high-speed planetary camera, and a spectrograph without any physical intervention at the site. This dramatically increases the scientific or imaging return from a single telescope by allowing it to perform multiple roles during a single night.

    Can I use an eyepiece with the IMP85 while my main camera is attached?

    Yes. You can leave your primary camera attached to Port 1 and connect an eyepiece via a standard diagonal to Port 2 or 3. By electronically activating the mirror for that port, you can instantly switch to visual observation and then switch back to imaging just as quickly.

    What adapters do I need to connect my telescope and camera to the IMP85?

    The IMP85 is sold as a central unit and does not include any adapters. You will need to purchase separate adapters for the telescope-side connection to your focuser and for each of the three instrument ports. The specific adapters depend on the threads and back-focus requirements of your focuser, cameras, and other instruments.

    For a public outreach event, how can the IMP85 improve workflow?

    The IMP85 allows a seamless transition between public viewing and serious imaging. You can have an eyepiece on Port 2 for guests to look through, showing them Jupiter visually. Moments later, you can electronically switch to a planetary camera on Port 3 to show them a live video feed on a monitor. Once the event is over, you can switch back to your primary deep-sky camera on Port 1 without any teardown or setup time.

    Is the IMP85 a standalone focuser or an accessory?

    The IMP85 is an accessory, not a focuser. It is an instrument selector that attaches to an existing high-capacity focuser, such as the 3.5" FeatherTouch model this adapter is designed for. All focusing is handled by your telescope's focuser.

  • Net weight (kg) 0.10
    Inner Diameter / Clear Aperture (mm) D120a
    Outer Diameter D92i
    Type of Adapter Reducing Adapter
    Optical length (mm) -2.5 mm
    Inner Connection (lens sided) S120
    Camera Connection 120 x 7.5mm dovtail
  • Baader Planetarium Warranty Policy