About The Accessories - Takahashi FC-100DZ Instruction Manual

The FC-100DZ utilizes many accessories to bring about a better performance.
50.8(2") Diagonal Mirror
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31.7(1¼") Diagonal Prism MC
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When using these accessories, the
distance light must travel becomes
longer, so if installed without following
the system chart focusing may be
problematic. When using the FC-
100DZ together with the 31.7(1¼")
diagonal prism, a separate 50.8(2")
extension tube S is necessary. The
image on the right shows the required
optical path length, and may be used
as a reference for connecting them. In
addition, when the 50.8(2") diagonal
mirror is attached to 50.8 diameter
eyepiece other than Takahashi's,
depending on the eyepiece, focusing
may be problematic.
4-Turret Eyepiece Holder 31.7D
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For those frequently changing from low
to high resolution eyepieces, the 4-Turret
Eyepiece Holder 31.7D becomes very
useful. This revolver can be equipped with
up to four 31.7mm(1¼") diameter sleeve
eyepieces at the same time, allowing to
quickly change between these four. In
addition, since the diagonal prism is already
incorporated into it, no matter the direction
of the celestial body it can be enjoyed from
any posture.
50.8(2") Adapter

About the Accessories

50.8(2") Extension Tube L
Optical Path Length 106.5mm
50.8(2") Diagonal Mirror
W h e n u s e d i n c o n j u n c t i o n w i t h t h e
extender-Q 1.6x (50.8/2") if not used
together with a 50.8(2") extension tube S
as specified by the system chart, there is a
chance that the focus point won't properly
focus or that it may not display its full
potential.
4-Turret Eyepiece Holder 31.7D
- 15 -
11mm
Optical Path Length
63.5mm
31.7(1¼") Diagonal Prism MC
Optical Path Length 81.0mm