© Baader Planetarium GmbH | 2023
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The visual version of the Herschel prism can be upgraded to the photographic versi-
on at any time. All you need are these three filters:
• Neutral Density Filter 2", ND 1,8 (T=1,5%)
# 2458331
• Neutral Density Filter 2", ND 0,9 (T=12,5%)
# 2458322
• Neutral Density Filter 2", ND 0,6 (T=25%)
# 2458321
Accessories on the Herschel prism
Eyepieces (2" and 1¼")
2" eyepieces are used as with any star diagonal and are securely clamped by turning
the ClickLock
®
a few degrees.
The Baader ClickLock
®
is a precisely fitting, very solid eyepiece clamp without clam-
ping screws. Eyepieces, cameras and similar accessories that are inserted sit securely
and are still not scratched! With a small turn of 20°, each eyepiece is clamped bomb-
proof. You never have to fiddle with small clamping screws again – instead, simply
turn the upper part of the eyepiece clamp by a few degrees and the eyepiece is firmly
fixed. This is no problem even when wearing gloves!
You do not have to tighten the ClickLock
®
clamps "until the blood runs out", because
the mechanical principle comes from professional mechanical engineering. This is also
how the tool holder on modern CNC milling centres works. By clever use of the lever
forces, the tightening torque is increased many times over. The inserted object is held
on three sides as with a quick-action chuck and can therefore no longer perform any
tilting movements.
For the use of 1.25" accessories you still need a reducer. We particularly recommend
the Baader 2" to 1¼" ClickLock
®
reducer
# 2956214
with 9.5 mm height, which also
offers the ClickLock
®
convenience for 1¼" eyepieces, or the Pushfix 2" to 1¼" reducer
# 2408151
, into which eyepieces can simply be inserted and which then has only
1 mm height.
Now you can use all 1¼" accessories for which the backfocus fits. If you have
enough backfocus, you can even use the Q-Turret eyepiece holder, which needs about
four centimetres extra backfocus.
Use the stop ring
# 2958027
to avoid a long eyepiece
touching a mirror or prism.
Caution when using
eyepieces with dual
2"/1¼" nose piece:
The maximum insertion depth
is 34.8 mm if a polarising filter
is fitted, or 40 mm as supplied. Longer
eyepieces may only be operated with an
additional 2"/1
¼
" reducer or a 2" stop ring
# 2958027
, i.e. using the eyepiece's 1¼"
nose piece. Otherwise they would sit on the
top filter.
