This telescope is inspected, measured and adjusted if necessary. The eyepiece output is stopped. On request from your telescope, you will receive a meaningful quality certificate (test protocol with star test, Ronchi, adjustment, with individual serial number)! Please specify when ordering!

Examples of our test protocols: Test records
How we adjust: About us

We will send these telescopes free of charge in Germany.

Long Perng S500M ED Apo - Opening 90 mm f / 5.5 - 2.5 "-Ocular Extraction

Very light-weight travelapo with 90 mm aperture and 500 mm focal length for observation and astrophotography

♦ Opening 90 mm / focal length 500 mm

♦ Very good light intensity with f / 5.5 for short exposure times

♦ Ideal travel telescope with only 410 mm transport length

♦ Over-sized 2.5 "-Crayford eyepiece extractor for very good illumination, also with CCD and DSLR cameras

♦ Micro-support for highly accurate focus

♦ High-quality 2-element ED lens for a contrast-rich and color-neutral image


Long Perng 90 mm f / 5.5 Large Field Refractor for Observation and Astrophotography
A very light-refracting refractor with a light and high-contrast image. The multi-compensated ED lens provides a bright and contrast-rich image with a truly first-rate star image. The color error is very well controlled by the ED element so that this apo can be used for a wide range of applications:

♦ High-field observation ... You can easily reach the focus with 2 "eyepieces - a gigantic field of view with almost 5 ° provides you with spectacular views of the large fog areas of our galaxy.

♦ Astrophotography ... With the optional TSFLAT2 field corrector you have a high-quality optics for the photography of mists and galaxies. Even cameras with large sensors can be used. Thanks to the 2.5 "eyepiece, the image field is not shaded. We also offer focal reductions for this telescope.

♦ Daytime observation ... The 90mm Apo can be measured loosely with extremely high-quality spotting scopes and also provides a lighter image and a significantly larger field of vision. With the optional 2 "-Amici-Prisma TSA245 you have a pleasant 45 ° view and an upright and lateral image - ideal for bird watching, for example.

♦ Telephoto lens for photography ... A telescope for astronomy is a telescope with a hand-held telescope with a focal length of 500 mm and f / 5.5 a fixed aperture ratio. This allows good photos even under difficult light conditions.

Universal mounting thanks to the versatile connection plate:
At the base of the apos you have a universal connection plate with two 1/4 "photoelectric connection threads. This allows you to adapt the telescope to a good tilt head or ball head like a spotting scope.

However, you can also adapt a GP Level or Losmandy Level Prism splint to the base and then attach the Apo to an astronomical mount. Matching rails can be found in our accessories.



Apo is particularly light-fast:

With an aperture ratio of f / 5.5, this APO is more powerful than most other apochromatic refractors we know. The high light intensity brings some advantages. The usable field becomes larger, especially in photography. In addition, the high light intensity allows shorter exposure times, both in the field of astrophotography and natural photography under extreme conditions. We offer suitable correctors for very good field sharpness.

The 2.5 "Crayford Extractor for better illumination:

A special feature is the high-quality Crayford eyepiece extractor. It is oversized with 2.5 ", which guarantees optimal illumination in astrophotography, which can not be afforded by a simple 2" pullout. Of course reductions to 2 "and to 1.25" with ring clamp are included.

The extension offers a 360 ° rotation. This allows you to rotate the camera or eyepiece to the desired position.



Opening: 90 mm
Focal length: 500 mm
Opening ratio: f / 5.5
Apertures: Internal screens for contrast enhancement
Objective: 2-elementigs ED lens with air gap
Overall length: 410 mm length with inserted exchange cover
Weight: only 3.4 kg
Eyepiece extractor: 2.5 "-Crayford extraction with micro-adjustment
Resolution: 1.35 "
Limit size: 11.5 mag


♦ 90 / 500mm ED-Apo with pull-out
♦ Reduction to 2 "and to 1.25" with ring clamping
♦ Protective caps for lens and eyepiece
♦ Suitcase for transport and storage


Benefit from our experience as a telescope specialist:
 
For over 30 years we have been passionate about astronomy
Every day we check, optimize & adjust telescopes, mounts & accessories, before handing over to the customer
In this way we know the advantages and disadvantages of the individual products
We sell & recommend only products we use ourselves of which we are convinced
For a comprehensive, brand-independent consultation we take a lot of time for you
As the first astronomy specialist, we offer our customers real-time video consulting,
For to see is to understand
Even after the purchase we are there for you & are still at the side for setup and operation
In case of questions or new entry, we offer instruction &
In special cases also on-site service in the Munich area