A telescope can be used with a variety of devices to cover a range of uses. For example, an eyepiece, a camera, a spectrometer, etc. But a telescopes has only one port. Changing accessories at night in the dark is not so easy, so a flip mirror provides a convenient solution. 

The Baader Flip Mirror II is more than a simple flip mirror. Being a Baader product, considerable thought has gone into its design. 

Features

• Three ports: 

1. Straight-through (M48/T-2 on both sides) for full-frame camera, spectrograph, or other instruments
2. Top-mounted T-2-thread for eyepiece holder, video-module (up to 32mm diameter fov) – or even a binocular-viewer
3. Bottom-port prepared to accept the optional Baader Off-Axis-Guider prism-assy (part of RCC-OAG #2956950) or an optional ThAr-lamp for motorised intermittent calibration of spectra

• Precision first surface mirror w. Enhanced-Al coating, for discriminating work w. small pixel cameras
• Backside of flip-mirror is also Al-coated and masked, to direct the light of an optional spectral calibration-lamp onto a spectrograph-slit
• Designed to enable precise adjustment of all optical pathways
• Shortest backfocus for each application – utilizing the wealth of adapters of the Baader Astro T-2 system, M48 system and UFC system
• front and rear M48 rotation-adjustment rings made from hardened stainless steel, matched to the BFM main body for zero play and for rotating and locking the BFM main-body in the optimum rotational alignment with any conceivable accessory equipment
• Readily accepts the Baader Universal Filter Changer system of parts (UFC system)
• Prepared to accept an optional motorised timing belt – as a core-tool for remote imaging, guiding and spectroscopy

Specifications

Sku (#) 2458055
Optical Length (mm) 55 mm with S52, 59 mm with M48/t-2
Dimensions (mm) 63 x 77 x 69 
Inner Connection (lens Sided) thread, Dovetail Ring Clamp, S52, T-2 (m42 X 0,75), M48
Inner Connection (eyepiece/-camera-sided) thread, Dovetail Ring Clamp, M48, S52
Outer Connection (eyepiece/-camera-sided) thread, M48
Type Of Adapter variable
Weight (g) 195 g

What's in the box

• Baader FlipMirror II Star Diagonal – with fine-optically polished, movable mirror
• Laterally adjustable T-2a top ring
• 2x M48i / S52 Dovetail ring made of hardened stainless steel # 2958552
• Reducing ring M48a / T-2i # 2958553
• Reducing ring M48a / T-2a # 2958554
• Inverter ring M48a / M48a # 2958555
• Pin type face wrench for M48 / T-2 and M4 counter nuts
• 3 mm screwdriver for M 4 brass adjustment screws
• 4x hex keys (2.5 / 2.0 / 1.5 / 1.3 mm). The 2.0 mm wrench has a ball head to reach screws even when accessories are mounted by holding the wrench at an angle.
• Bottom flange (laterally adjustable 1mm) for off-axis guide or calibration lamp for spectroscopy
• Dust cap for bottom flange
• 2 x M48 dust caps
• T-2 dust cap