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© Baader Planetarium GmbH | 2019
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Manual: FlipMirror II
Using the FlipMirror II
The FlipMirror II allows a variety of permanent adapta-
tions to your telescope
1
. Use the rotary knob
2
to
switch between the rear port
3
and the top port
4
;
you can use an optional toothed belt to operate it with
a motor (not included). An autoguider or a calibration
lamp can be connected to the bottom port
5
.
General Function of the FlipMirror II
The BFM II lets you switch between a straight light
path (
Position A
) for a camera or other measuring
instruments and an angled light path (
Position B
), e.g.
for an eyepiece. The following figure shows how it works. In addition, a calibration
lamp for spectrographs or an Off-Axis-Guider pickoff-prism (that is not affected by the
mirror position) can be connected at the
AUX-port
on the bottom.
Connection to the telescope
For connection to the telescope
1
you can choose between an S52 dovetail ring, an
M48 thread or a T-2 thread. To use the M48 thread, remove the pre-installed reducing
ring from M48 to T-2, using the supplied tool
7
.
Based on these threads, various adaptation options are available. We recommend
screw connections so that even heavy accessories can be securely fastened to the
telescope. Furthermore, you can use the following adapters if your telescope does not
already have a T-2 or M48 connection thread:
• Baader Nosepiece 1¼" / T-2
# 2458105
for use with 1¼" eyepiece clamps
• Baader 2" / T-2 Nosepiece and Camera adapter
# 2408150
for use with 2" eyepiece clamps
• Baader SC / HD Ultra Short T-Adaptor, 7mm optical length
# 2958500B
for use with Schmidt-Cassegrain- and EdgeHD-telescopes
• M68 to T-2 Conversion Ring
# 2458233
• Diamond Steeltrack® M48 adapter
# 2957204
for direct connection to Diamond
Steeltrack® focusers
You can also remove the M48 thread-adapter (see below image) to access the S52
dovetail ring. This way, you can attach the flipmirror with the largest possible aperture
and the shortest optical path length to fit e.g.:
• 2" / S52 Nosepiece
# 2958551
for use with 2" eyepiece clamps
• S52 dovetail Camera-Adapter for Wide-T-rings
# 2459119
• the UFC Universal Filter Container system in front of the BFM II. To mount the UFC
between FlipMirror and telescope, you need the S52 dovetail Camera-Adapter for
Wide-T-rings
# 2459119
. You can find more about this on page 8 (connecting a filter
slider).
Position A:
Mirror is up, so that the rear
port can be used
On the telescope side, the BFM II is equipped with a female T-2 thread (image to the left).
If you remove this threaded ring, you can use the M48-thread (central image). There are four grub screws at the
side of the housing (red arrows) which secure the M48 ring. If you loosen them with the 1,5mm hex key, you can
rotate the BFM II (for both M48 and T-2 thread – see also page 10) and/or use the S52 dovetail ring (right image).
Position B:
Mirror is down, so that the
top port can be used
1
4
3
5
2
T-2
M 48
S 52
55mm (S52)
59mm (M48 / T-2)
Position A:
e.g. for DSLR-/ CCD-/
CMOS-cameras or
spectrographs
AUX-Port:
e.g. for Off-Axis Guider
(independent of the
mirror position) or
calibration lamp
Position B:
e.g. for second
camera (video mo-
dule), observation- or
guiding-eyepiece
