Mitsuboshi M57 Camera Interface System
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This Mitsuboshi camera interface system
allows the precision of
knife-edge focusing to be
applied to virtually any
type of prime focus imager
including CCD, film, or
digital SLR camera systems
as well as adding the
flexibility of allowing the
camera to be rotated for
best framing of the shot.
The metric M57 interfaces
allow the system to work
with a wide range of
telescope systems, directly
coupling to Borg telescopes
or to Vixen and Takahashi
scopes via Borg adapters.
Other brands of scopes can
be coupled via Borg 2" or
T-thread interfaces.
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The key components
are M57 Taper Ring (M57TR),
shown at right (top),
and mating part M57 Taper
Holder (M57TH), shown at right
(bottom). The taper holder is
attached to the telescope,
while two taper rings are
used -- one to attach to the
KEF, and one to attach to the
imager assembly.
The taper ring connection
allows for quick
disconnection and precise
reconnection of mating
assemblies as well as
for camera rotation
for best composition of the
image. In addition, the
M57TR component incorporates
an integral 52mm filter holder.
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An example showing the versatility of the
interconnect system is at left:
- (A) Mini Borg scope with taper holder (M57TH) attached.
- (B) Taper ring with 52mm filter installed,
followed by Mini Borg 0.85x reducer
(#7885)
and Borg Canon mount adapter
(#5005).
- (C) Canon Digital EOS
camera body
- (D) Mitsuboshi Knife-edge focuser
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Connection to the
telescope on the taper
holder side is accomplished
in different ways depending
on the telescope:
- Borg: direct connection (M57).
- Vixen: Borg adapter
#7901.
- Takahashi: Borg adapters
#7910,
#7911,
or
#7912.
- Meade or Celestron SCT: Borg adapters
#7424.
- Generic male T-thread:
#7528,
- Generic 2" eyepiece holder:
#7425
(right).
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Connection of the imager is also
done on the taper ring side using an adapter
to the appropriate Borg camera coupler. For
CCD imagers or digital SLR cameras which have
small imaging sensors, a Borg reducer
(#7885
for Mini Borg scopes,
#7785
for Borg Series 80 scopes)
can also be used to maximize the field
of view captured by the sensor.
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Some specific sample configurations for
imager connections are:
- Prime focus:
M57TR --
#7000
--
#5005
-- Canon EOS
- Focal reducer (Mini Borg):
M57TR --
#7885
--
#5005
-- Canon EOS
- Focal reducer (Borg Series 80):
M57TR --
#7785
--
#5005
-- Canon EOS
- Prime focus on SBIG, Bitran, and other T-thread cameras:
M57TR --
extension tube
(#7601,
#7602,
#7603, or
#7604)
--
#7522
-- camera
- Prime focus on Starlight Express and other M42P1.0 thread cameras:
M57TR --
extension tube
(#7601,
#7602,
#7603, or
#7604)
--
#7523
-- camera
- Prime focus on Bitran and other C-mount thread cameras:
M57TR --
extension tube
(#7601,
#7602,
#7603, or
#7604)
--
#7524
--
#7526
-- camera
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