Suburban or Rural
Double stars, Sun, Open Clusters
Elongated Epsilon Lyrae at only 21x
Vixen GP-102M, Televue Ranger, Takahashi FS-102
you remember the
first day using your refractor?. Experiences?, Observing?. Did you
the date (year)?
received the small
Zeiss the Friday afternoon of 30th, March, 2001. Then the cloudiest
came to Spain from 100 years ago, so soon I was making “mountain
from inside the living-room of my flat. Anyway, this revealed a very
thing: In the border where the snow finds dark rock no chromatic
was found. Later, some artificial stars from light bulbs located about
1 km from my home were rendered as beautiful pinpoints. While
these lights, I observed nice diffraction circles with exactly the same
pattern inside and outside focus. I started to suspect this would be a
later, I observed
the Sun (always with a filter, of course), and the results were better
than using a Televue Ranger, and even approaching a very good 4”
clouds opened and
the first stellar light from out of our solar system entered the
Regulus (Alpha Leonis) was beautiful and cranking up the magnification
up to 221x I knew this refractor will be a fantastic observing
is you favourite
observing site?. Conditions of the site (weather, limiting magnitude,
transparency, "seeing".., etc)?
population in Spain is
usually concentrated in flats inside towns, so in order to observe with
the telescope, I always must to drive a bit. In Oviedo there are some
in the suburbs that allow casual observing, with 3.0 limiting magnitude
skies. More suitable places are “Via Pará” at about 900 meters
sea level while climbing the “Angliru” mountain and “Smoking Hill” (El
Fumeru) at 500 meters over sea level. Anyway, my preferred observing
is “Sena de Luna”, located 80 kms south from Oviedo at an altitude of
meters and with a naked eye limiting magnitude of 5.5-6.0 on new Moons.
Transparency is usually 8-9 in a scale from 0 to 10. Seeing is also
type of sky objects
do you prefer to observe with your Telementor/Telemator?
stars are my preferred
objects. Incidentally, bright stars such as Antares, Vega, Arcturus,
and the like are lovely thorough this refractor when observed at high
(I use 221x for this) because the coloration is rendered without false
color and you can enjoy a lot from the intrinsic tones of stars and
is your best achieved
view or the most incredible view you have got with the Telementor?.
is the most beautiful sky object observed with your refractor?
bit prosaic, Epsilon
Lyrae has been up to now my best “delight” with the Telementor, because
using a Televue star diagonal and a 40mm Plössl eyepiece, I
a clear elongation at only 21x in both doubles from this system. I
to rub my eyes in order to believe what I was observing!
eyepieces do you
use?. Other accesories?
I have the
Zeiss Jena H-25mm and the 16mm, 12.5mm and 10mm Carl Zeiss Jena Orthos.
All provide very sharp views, but I also use 1.25" Baader Eudiascopic
in the following focal lengths: 35mm, 20mm, 10mm, 5mm and 3.8mm. I
they are so sharp as the Zeiss Orthos, but offering a bit more apparent
field (52º). In order to observe the Sun, I use a Baader solar
you compared the
small Zeiss with other telescopes?. What were your experiences on this?
compared it with
my 4” Vixen achromat (the wonderful one made in Japan, no the ones made
in China). While the Zeiss has a more quality objective, the Vixen is
very good, so the difference in aperture becomes decisive (63mm against
102mm is a lot in this small class). On the other hand, the Zeiss is
easier to transport, so I think I’m going to use more the Zeiss than
Vixen, specially for solar observing.
intereting also to note
the Telementor has a better star-test than my Takahashi FS-102.
the FS-102 has an impressive extra and intrafocal difraction rings
the ones from the small Zeiss are even beter. Just imagine!
working out a deep
comparison between the Telementor and the Televue Ranger in these days.
It’s a really interesting showdown, and in a near future I’ll write
the results. [Update: The Spanish magazine "Tribuna de
y Universo published in the October/2001 issue my article
Telementor vs. Televue Ranger, dos refractores de gran personalidad"].
you happy with
your refractor?. Pros and cons?
happy with it. The
best “Pros” are its excellent optical and mechanical quality. In fact,
the images through it make me to remember the typical “Astrophysics”
(or let’s say, Astrophysics images appears as something really close to
Zeiss images!). Mechanically, it’s superior than an Astrophysics, and
is a lot to say about a telescope. The only “cons” is the manual device
in RA for following an object in the sky. You need to “rewind” this
every 30 minutes or so, but soon you get used to it and then it becomes
No more for
now. Only to
say every observer would enjoy using this refractor. When you observe
it not only you enjoy the views that it proviedes, but you also know
are using an instrument from the best family of telescopes ever built