Three 61cm aperture Klevtsov telescopes
Feb 28, 2003.
Three 61cm aperture Klevtsov telescopes are now in service at the European Southern Observatory
for Near Earth Object asteroid patrol!
Please see: http://www.oam.es/oam/unicorn/ninstrumental_en.htm.
Yuri Klevtsov's optical design was chosen for the following reasons:
- economical compared to conventional optical systems of comparable performance,
- compact size permits a light weight tubular structure,
- focal ratio can be optimized for various applications.
The Klevtsov's models now are adjusted
Nov 1, 2002.
The design of Klevtsov's TAL-150K and TAL-200K optical tube assemblies is
changed. The back cover now has openings allowing to have access to primary mirror
adjustment bolts. These openings are normally covered by removable shield.
Users now have an ability to perform adjustment of primary mirror by
themselves. TAL offer to every customer who purchased the telescope earlier
and now suppose that his telescope needs collimation
to exchange old style back cover/focuser unit for new style unit.
Every customer interested in this offer should contact his dealer.
Exchange will be realized free of charge.
TAL products debut at NEAF
Jun 5, 2002.
For the first time in North America, TAL's full product
range was on display at the recent NEAF
astronomy show in Suffern, NY. This is one of the largest Astronomy Conferences
in N. America and is hosted and organised by the Rockland Astronomy Club. Most
major telescope and accessory manufacturers were in attendance.
New articles are publish
Feb 7, 2002.
Article from magazine "Sky &
Telescope" for 1981 is placed in section of articles.
Instead of using the Maksutov meniscus as a full-aperture
corrector, design presented here use a small meniscus located
in the convergent beam of light from the spherical primary
mirror. By Ralph W. Field. [More
Jan 22, 2002.
Interesting article from magazine
"Scientific American" for 1972 is placed in section
of articles. Modified
Maksutov' scheme, one of variants of Argunov' / Klevtsov'
scheme is described by Robert J.Magee. [More
A new collimator with a 12" diameter parabolic mirror
A new collimator with a 12" (300mm)
diameter parabolic mirror of 3156mm focal length has entered
service. It is intended for quality control and determining
the resolution of telescopes up to 300mm aperture. It will
play a vital role in the creation of a 250mm a telescope
based on Klevtsov's design.
Our exclusive North American
30 Oct 2001.
Novosibirsk is pleased to announce
the appointment of the firm Talscopes (Canada) as
our exclusive North American. Details can be found on their
website at www.talscopes.com.
Talscopes will be responsible for all aspects of sales,
marketing, distribution, and service of our astronomical
telescope products, under the direction of Malcom Bird,
an amateur astronomer and management professional.
Polish firm HIMPOL became factory's the exclusive dealer
In August 2001Grzegorz Matosek, a representative
of Polish firm HIMPOL,
visited Novosibirsk. During our meetings, the development
of amateur astronomy in Poland was discussed and future
contracts for delivery of telescopes and accessories to
Poland were signed. The HIMPOL firm became factory's the
exclusive dealer in Poland.
The new model TAL-150P8
The new model TAL-150P8, developed on the basis
of telescope TAL-2,
has the following refinements:
- Parabolic primary mirror;
- The major axis of the diagonal mirror is reduced to
30 mm (TAL-2 has a 40 mm major axis diagonal) to improve
image contrast by minimizing central obstruction;
- A 2-inch format focuser (with adapter for 1.25-inch
- The linear range of focusser is increased to +30 mm
(TAL-2 has +12 mm).
Other characteristics are similar to those of the TAL-2
Tests of a new, improved mount
Tests of a new, improved mount for the TAL-150K model are
currently in progress. This mount will be capable of supporting
all of the telescopes in the TAL line except the small TAL
and TAL-M reflectors. The project should be completed early
in 2002. Features of the new mount include:
- DC stepper motor drive instead of the AC synchronous
- Three tracking speeds: sidereal, solar, and lunar;
- Hand controller for varying the motor speed over a wide
- The direction of rotation of the motor can be reversed
to permit operation in the southern hemisphere;
- A polar boresight is included for ease of precisely
aligning the polar axis on the celestial pole.
New Ultra Wide Angle eyepiece
A new Ultra wide-angle 8-element eyepiece with a focal
length of 24mm is now available. Full multi-coatings on
all air-glass surfaces and an 80 degree field of view. This
eyepiece is the first in a series of 2"-format eyepieces.