|A perfect viewing scope and
perfect match for digital viewing and imaging with ProStar
Great Compact Newtonian for all occasions
And we mean it! If you are looking for a great
general all-round telescope that looks smart, with colour
distortion free reflecting optics, is light-weight and produces great images in one complete package then this classic
affordable Newtonian reflecting telescope is just the ticket.
compact, light-weight and highly portable 130mm
f/5 Newtonian telescope was designed by the optical engineers at
Vixen Co. Japan many years ago providing not only a compact size, light
weight Newtonian design telescope with exceptional high contrast optics but
open tube (dew free and colour free benefits) benefits of a mirror reflecting Newtonian
telescope at the same
time. Just as important, a scope that does not readily get dewed up
optics in the field.
||130mm parabolic mirror (f/5)
||0.89 arc seconds Limit mag
||1.25 inch with removable T2
||20mm and 6.3mm Plössls
||1.05 arc seconds
||6X30 optical finder scope
||Yes - Standard M42 T-thread
visual back - takes 1.25" eyepiece also
I love this little scope not just because of its excellent optics
but its versatility for both visual and CCD imaging. Plus, with a
PortaMount II, I can pick it up with one hand
and carry it out front or back with ease.
At the rear of the optical tube is a mirror cell cover plate which provides additional contrast
improvement by stopping external light sources penetrating the
back end of the primary mirror. Using a simple Phillips head screw
driver it is easily removed to allow access to the primary mirror
collimation adjustment and locking screws.
Small central obstruction secondary (approx 40mm) and fine 1.5mm
spider veins allows for more improved contrast and pinpoint stars.
Note also the convenient centre spot marking on the primary mirror
making collimation with a visual tool or laser collimator so much
easier. The secondary mirror three point mounting can be adjusted
easily with an Allen key.
Visual - The Night Sky
This little scope, whether fitted to a
simple GO-TO mount
Vixen Porta Mount II,
provides breath taking views of the Moon, Jupiter and its 4
largest satellites, the split rings of Saturn and its brighter moons, the
phases of Venus, the polar ice caps and dusky surface features of Mars,
plus even small the small disks of Uranus
and Neptune in good seeing conditions. Colours of various
distant stars revealed their blue, yellow and orange hues and the
magnificent NGC104 (47 Tuc) was breathtaking as usual.
The focuser of the R130Sf is a two component system. For visual
observing, it uses a 55mm T-thread screw on extension tube with
thumb screws for securing a 1.25 inch eyepiece. By removing the
extension, the shorter focus adaptor reveals a male T-thread (for
use with a DSLR camera (fitted with a T-ring adaptor) or
mounting a filter wheel but also with 2 thumb screws to allow
fitting of small cameras like webcams etc fitted with a 1.25 inch
Fig-6: GSTAR-EX2 fitted directly to 1.25 inch adaptor and tightened
with thumbscrews. Focus can also be achieve with the ProStar C-mount
1.25 inch nosepiece reducer lens
5 position filter wheel with
GSTAR-EX2 fitted using
low-profile C-T adaptor comes to focus without a problem.
So in the configuration of Fig-6 above we fitted a
GSTAR-EX2 monochrome camera
to try the scope out on
Silver Coin galaxy NGC253 in Sculptor.
The image above is only a quick
stack of 100 video frames from GSTAR-EX2 CCD video camera in place
of the eyepiece (prime focus). How amazing we can obtain such beautiful views of a
galaxy with such a small telescope and modern CCD video camera.
These images have not been post processed and reveal the view as
they came off the camera and R130Sf. It also serves to demonstrate
the wide field of view using a camera with only a 1/2 inch CCD.
After swapping the cameras 1.25 inch
nosepiece and replacing with the
ProStar 0.5X c-mount focal reducer, this image above is again a
quick stack of 100 video frames using the GSTAR-EX2 camera.
Note: the lovely wider field view that is produced from the short
focal length of this 130mm telescope and
the increased image brightness due to the reduction lens. The view
live on the PC screen was nothing short of amazing particularly
much we strain our eyes to see just a fuzzy cigar shaped object at the
eyepiece. These images taken from semi-light polluted suburban
I remember some time ago at a group star gathering, the amazement of
other attendees who gazed at the live view of M27 (Dumbbell Nebula)
on my portable T.V monitor and their surprise at the little
Newtonian scope producing such bright detailed views. While others
grappled with sorting out their auto-guiders and focus frames, I had
this baby up and imaging within 5 minutes.
The under breath ooo's
and ah's from the growing crowd around the video monitor was proof
in point of just how excellent the R130Sf is when combined with a
powerful camera like the GSTAR-EX2, as a public outreach tool.
Left: And speaking of using the GSTAR camera with
this excellent little Newtonian, the picture at left was
taken May 28th 2015 using a 5X tele-extender for good magnification.
The R1309Sf was mounted to a simple Vixen
Porta II Mount and hand guided using the 6X30 optical
finderscope as the International Space Station raced
In summary, I really enjoy using this telescope and is now a
permanent member in the collection.
The surprisingly smooth, non-slip rack & pinion focuser showed no
dramatic image shift and was easy to adjust accurately despite the
small focus wheels. It's easy to tuck in the boot of a small car and
take on the road and with a nice set of Vixen NPL or NLV oculars the
views are very impressive. It works brilliantly with my GSTAR-EX2
camera both in aperture and image scales required for most objects I
want to capture quick and easily.
Needless to say... we highly recommend it !
BUY IT NOW from AstroShop Australia and ensure full protected authorised distributor warranty &
reviews are only intended to provide prospective purchasers
our own first hand impressions of performance and build as
has been our long time policy.
AstroShop - Binary Systems P/L