© 2023 Baader Planetarium GmbH
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Example Configuration for SolarSpectrum H-alpha-Filter – visual use, M48-System
For very large H-alpha filters, it is worth using the M48 system and 2" eyepieces to
make use of the entire field of view without vignetting caused by 1¼" eyepieces or T-2
adapters. Smaller H-alpha filters can also be used with 2" accessories, but here the
filter diameter limits the visible field of view.
The 2" Research Grade TZ-3
# 2459257
has a back focus of 250 mm, although there
is some flexibility due to the parallel beam of light. We recommend the following setup
for 2" eyepieces:
1
E.g. TriBand Schmidt-Cassegrain with SC-thread
2
# 2958243
Baader Ultrashort 2"/ 2" Thread-Inverter-Ring, included with the TZ-3
3
# 2459257
2" Research Grade TZ-3 Telecentric System (3-times extension of the
focal length),
4
# 2958244
Baader Reducing-Ring 2"i / T-2a, with 1.5 mm optical length, included
with the TZ-3 – to attach SolarSpectrum-Filters with T-2-thread. Not needed for
SolarSpectrum-filters with female SC-thread.
5
SolarSpectrum-Filter with female SC-thread on both sides. Filters which only have
T-threads on the eyepiece side need in addition the reducing piece M48a / T-2i
# 2958553
, cf.
6
6
# 2454834
2"a / M48i Zero-length reducing piece (zero optical length) and
# 2958555
Conversion Ring M48a/M48a. If your filter has got a fixed male T-2-th-
read, you need Reducing piece M48a / T-2i
# 2958553
instead.
7
# 2958593
Baader Heavy Duty M48 Quick Changing System, length 15 mm
*
8
2 pieces
# 2958610
Baader M48 extension tube 10 mm
9
# 2956248
Baader 2" ClickLock M48i Eyepiece Clamp, length 36,5 mm
*
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Prism diagonal, e.g.
# 2456117
Baader 2" BBHS
®
Prism Star Diagonal
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Eyepiece, z.B.
# 2454636
36 mm Hyperion Aspheric 2" Eyepiece
*)
When using the eyepiece clamp
9
, the quick changer
7
can be replaced with M48
extensions, or vice versa. Instead of using
9
, the nosepieces of our 2" star diagonals
can also be screwed directly onto a M48 extension tube.
