The Mini Borg 50 scope provides a solid base upon which very compact
and stable guide scope systems may be built:
Basic Guide System: Mini Borg with precision helical focuser
(#7315)
Deluxe Guide System: Basic System + X-Y Offset Positioner
The Mini Borg 50 features a high quality achromatic doublet objective
(optics made in Japan) with a focal length of 250mm (f/5).
The Mini Borg guide scope is much lighter than other scopes,
an important factor contributing to an imaging setup which does
not suffer differential flexure, whether mounted
in piggy-back or side-by-side configuration:
Basic guide scope weight: 390g
Deluxe guide scope weight: 630g
The optional X-Y offset positioner allows the CCD camera's sensor
to be moved around the guide scope field of view (±12mm
X and Y travel) so that the number of available guide stars
is maximized.
The X-Y offset positioner is compact
(120mm x 120mm x 18mm) and lightweight (240g). This approach
allows for the flexibility of positioning the guide camera,
yet eliminates the need to use 3-point ring systems which
are prone to causing flexure problems.
All connections in the guider configuration are threaded and
rigidly coupled to eliminate the guide scope flexure problems often
encountered with other scopes. No drawtube is used in this special
guide scope configuration.
To couple the guide scope to the autoguider camera, a variety of options,
including T-thread, 2", and 1.25" nosepiece connections can be
accommodated as can be seen in the examples below.
