Test and Adjustment Skywatcher Explorer-130/900 OTA
The Skywatcher Explorer 130/900 is checked and adjusted by us before delivery. The focuser is set.

All Newton telescopes should be adjusted before first use and then regularly
to get a sharp picture. We adjust all of our Newton before they leave our house.

How we adjust: About us

Skywatcher Explorer-130 / 900mm f / 6.9 Newtons (BK1309OTA)

This Skywatcher 130/900 Newton mirror telescope uses a tried and tested design for over 300 years, named after its inventor and first user: Isaak Newton. Especially for beginners and young people a very original and suitable implementation of technical sky observation.
Newtonian telescopes are particularly popular because they have more light output in the same price range due to their larger aperture, such as lens telescopes (refractors).
Furthermore, these telescopes provide a clear picture.
The telescope has a 130mm aperture with 900mm focal length (f6.9) and collects 344 times more light than the human eye. It provides 30% more light collection power than, for example, a Newton with 144mm opening. Its 260x maximum useful achievable magnification offers beautiful lunar and detailed planet observations (like the rings of Saturn, moon shadow games on Jupiter or its big red spot) and also interesting deep sky excursions to brighter objects, such as the Orion Nebula, the open double star cluster (h and chi) in the Perseus or even the galaxy groups M81.

Together with the bright and contrasting picture, beautiful details show up here. Of course, the field of view is slightly smaller than short-range devices, but I do not need it on the moon and planets. Since the longer focal length is advantageous because you do not need additional Barlow lens for higher magnifications. This is used at very high magnifications, if the visibility conditions (low air movement, good transparency of the sky ...) allow it. (Bear in mind that every movement of air is magnified.) Since the moon reflects enough light, it will be used primarily to observe the craters and surface structures of our satellite.

Even brighter deep-sky objects, such as the Orion Nebula and the Andromeda Galaxy, are beautiful viewing objects. At 130mm opening, I already have a good Lichtsammelvermögen. Therefore, galaxies and nebulae are visible in the high-contrast image. Star clusters show their beauty and clearly stand out against the darker background.

A suitable device for school astronomy.

Skywatcher Explorer-130 / 900mm f / 6.9 Newtons (BK1309OTA)

Product advantages:

+ Ideal for older children (from approx. 12 years) and beginners - also for school astronomy
+ Suitable for high-contrast lunar and planetary observation and
   also lighter deep-sky objects
+ Size opening over refractors in the same price range for more light collection performance
+ Fine adjustment and LED red dot finder facilitate intuitive sighting of objects
+ Cheap in purchase

 
To note:

- Not suitable for landscape observations.
  For this we recommend a refractor in this price range.
- Not suitable for astrophotography.
- In addition, we recommend a lunar filter to protect the eyes and lunar observation
  for better contrast.
A suitable tripod for the telescope must be present or purchased



Delivery:

Skywatcher Explorer 130/900
clamps
Red dot finder

Technical data at a glance:

Type: Mirror telescope parabolic / Newton
Color: Black
Lens diameter: 130 mm
Focal length: 900mm (f / 6,9)
Resolution: 0.9 arc seconds
Limit size: 13.3 mag
1.25 "focuser, short construction
Red dot finder
Catch and zenith mirror with
Centering marking to simplify the adjustment
Tubus length: approx. 920mm
Weight (tube + clamps): approx. 4.2 kg