Page 91 - BBC Sky at Night - September 2017 UK

FIRST LIGHT SEPTEMBER 91

HYBRID PLUS TUBE RINGS
DRIVE The substantial and beautifully machined PLUS (Prima Luce
FOCUSER Universal System) support rings clamp the scope for mounting.
Three pre-threaded M8 female screw-holes and two head-
The hybrid drive focuser recessed non-threaded holes are provided on the top and bottom
combines the qualities of of each ring. This gives excellent flexibility for both mounting the
a Crayford-style focuser scope on a dovetail as well as attaching extra kit on top.
with that of a lockable
rack and pinion. This
produces a fast, smooth
focusing action that won’t
slip with a heavy camera
attached at high angle.
A 1:11 fine-focus knob
ensures you achieve the
accurate focus with ease.

INTEGRATED
),(/'!)/$77(1(5
Short focal length, wide-field
instruments are great for
covering large sky areas,
but are prone to
distortions noticeable
at the edge and
corners of the
imaging field.
This can be a big
ONAXISLOCK problem if you’re
using a camera
The Airy APO 65F has a serious camera connector in the shape with a large sensor.
of the OnAxisLock system. The telescope offers a 2-inch fitting The Airy APO 65F
as standard and a 1.25-inch adaptor is supplied. A locking contains an internal
ring ensures the barrel of attached equipment is held securely field-flattener made
and exactly on the central optical axis of the scope. from FPL-53 glass.

skyatnightmagazine.com 2017