The Baader IMP85 37.5mm Extension for IR90, from Alpine Astronomical, helps to achieve more back-focus for the IMP85 Instrument Multi Port when attaching the IR90 Integrated Rotating Focuser from PlaneWave to the telescope.
- Connections on telescope side: PW focuser LK200 5/16 pitch 18 UNC
- Optical length: 37.5mm
- Inner and outer diameter: 215 x 43mm