Overview of My Current Telescopes

Introduction | Sky-Watcher Heritage 100P | Sky-Watcher Explorer 150PDS | Sky-Watcher Skymax-127 OTA | Omegon Photography Scope 72/432 OTA | Basic Data of My Current Telescopes | Links

On this page, I present some information about my current telescopes. Further below you will find a tabular overview of the basic data for the telescopes.

Note: Here you will find an overview of all telescopes that I own and owned.

 

Introduction

In the course of time, I have already tried a couple of telescopes and extended my "collection"several times, but also reduced again it at times. The reasons for the changes were of a different nature, and often the criteria "large aperture" and "weight/transportability" conflicted with each other. At the moment, my collection consists of the following devices, including a Sky-Watcher Star Discovery AZ GoTo mount and a Sky-Watcher AZ Pronto mount, on which I can use my telescopes more comfortably:

Dobsonian/Newtonian Telescopes:

Maksutov-Cassegrain Telescope:

Refractor:

The following overview lists the various options offered by the individual telescopes:

Telescope Sky-Watcher Explorer 150PDS Sky-Watcher Skymax-127 OTA Omegon Photography Scope 72/432 OTA Unistellar eVscope
Type Newtonian tube; this was years ago the typical kind of a beginners' scope for "real" hobby astronomers Maksutov-Cassegrain tube Refractor tube, also usable as a spotting scope and camera lens Newtonian scope with sensor chip, fully automated
Data
Aperture, Focal Length, Focal Ratio 150 mm, 750 mm, f/5 127 mm, 1500 mm, f/11.8 72 mm, 432 mm, f/6 114 mm, 450 mm, f/4
Light Gathering Power, Limiting Visual Stellar Magnitude, Resolving Power 459, 12.7 mag, 0.77" 329, 13.2 mag, 0.91" 105.8, 11.1 mag, 1.61" 265.2, 16 mag, 1.02"
Maximum Magnification approx. 225 x (300 x) approx. 250 x approx. 144 x 150 x
Magnification with 32 mm / 4 mm Eyepiece 23.4 x / 187.5 x 46.9 x / 375 x (too high) => 214.3 x (7 mm; 6 would be optimal) 13.5 x / 108 x ---
Use
Used as... telescope for home use or to be moved to observation locations in a car; for moon, planets, and a lot of deep sky objects ; for quick astrophotography with an Atik Infinity camera moon and planets telescope; travel scope (but already somewhat heavy...); telescope for a "quick look" (moon, planets) travel scope; telescope for a "quick look"; for moon, planets, and brighter deep sky objects (wide field telescope) telescope for "video astronomy" (wide field telescope)
Usable with My GoTo Mount? yes? (tube weighs 5.5 kg), but I use it... yes (but the finder is located poorly...) yes no, has its own GoTo mount
Usable with My AZ Pronto Mount? no, too heavy yes, but already too heavy for this mount... yes no, has its own AZ mount
Observation
Sun yes (with solar filter size 7) yes (with filter size 6) yes (with solar filter size 4) no
Moon yes (I own a gray filter for the moon) yes (I own a gray filter for the moon) yes (I own a gray filter for the moon) no (but not well suited to observing the moon)
Planets yes (but planets are still small; therefore the Skymax-127...) yes, but the maximum usable magnification about is 250 x yes-and-no (planets are rather small...) no
Deep Sky Objects yes (quite a few; still low magnification for details) yes (the brighter ones; more magnification, but high focal ratio = slow) yes (the brighter ones; low magnification - wide-field observations) yes (wide-field observations
Terrestrial Observations no yes, with an Amici prism yes, with an Amici prism no

Further down, you will find a table with additional technical data for the telescopes.

 

Sky-Watcher Explorer 150PDS

Purchased at the beginning of April 2017 (shown on the Sky-Watcher Star Discovery AZ GoTo mount). This telescope tube replaces my 8" GSO GSD 680 Dobsonian telescope, which was still too heavy for me. First experiences with this telescope tube look promising, also when used together with the Atik Infinity camera.

For details see page Sky-Watcher 6" Newton Information. For technical data see below.

 

Sky-Watcher Skymax-127 OTA

Side view on AZ Pronto mount with extension tube

Ditto (detail)

Other side, on AZ Pronto mount without extension tube

Ditto (detail)

Purchased used in November 2017. The Sky-Watcher Skymax-127 OTA (focal length 1500 mm) is a Maksutov-Cassegrain tube, which allows higher magnifications than Newton telescopes of the same aperture. Therefore, it is useful for observing the sun, the moon, and the planets. Most of the time, I use the tube on the Sky-Watcher AZ Pronto mount, but I also use it on the Sky-Watcher Star Discovery AZ GoTo mount.

For details see page Sky-Watcher Skymax-127 OTA Information (5" Maksutov-Cassegrain). For technical data see below.

 

Omegon Photography Scope 72/432

Side view on AZ Pronto mount with extension tube

Ditto (detail)

Other side, on AZ Pronto mount with extension tube

Ditto (detail)

Purchased in September 2018 at the AME2018 astronomy fair and delivered soon after. The Omegon Apochromatic Refractor Pro APO AP Photography Scope 72/432 ED OTA is a refractor tube, which is useful for observing the sun, the moon, and maybe the planets, but also for wide-field DSO observations. It can also be used as a spotting scope (with an Amici prism) and as a camera lens. Most of the time, I use the tube on the Sky-Watcher AZ Pronto mount, but I will also use it on the Sky-Watcher Star Discovery AZ GoTo mount.

For details see page Omegon Photography Scope 72/432 ED OTA Information (2.8" Refractor). For technical data see below.

 

Unistellar eVscope

Source: Unistellar (Media - Press material)

The eVscope is a 4.5" Newtonian telescope (aperture 114mm, focal length 450mm, aperture ratio f/4) on an Alt-AZ GoTo mount. Its special feature is, however, that it is designed to produce images of celestial objects that are reminiscent of photos taken with large or space telescopes (of course, in a lower resolution, but at least, it can...) and that can even show colors. The telescope is announced as working simply and more or less fully automatically. I took part in a Unistellar Kickstarter campaign in November 2017, but will not receive it until September 2019 at the earliest.

For details see page Unistellar eVscope. For technical data see below.

 

Basic Data of My Current Telescopes

Telescope
Sky-Watcher Skymax/Explorer
Omegon Unistellar
127 150PDS PS 72/432 eVscope 
Optical Design Maksutov-Cassegrain Newton (Parabolic) Refractor Newton (Parabolic)
Primary Mirror Diameter 127 mm (5") 150 mm (6") 72 mm (2.8") 114 mm (4.5")
Focal Length, Focal Ratio 1500 mm
f/11.8
750 mm
f/5
432 mm
f/6
450 mm
f/4
Resolving Power (arc secs) 0.91" 0.77" 1.61" 1.02"
Limiting Visual Stellar Magnitude 13.2 mag 12.7 mag 11.1 mag 16 mag
Light Gathering Power 329.2 459.2 105.8 265.2
Maximum Practical Visual Power 254 x ca. 225 x (300 x) 144 x 150 x
Optical Tube Dimensions
(diam. x length)
14.4 x 33 cm 18.2 cm x 69 cm
18 cm x 68 cm*
10 cm x 39.4 cm n.a.
Net Weight Basis --- --- --- 7 kg in total
Net Weight Optical Tube 3.4 kg 5.0/6.0 kg
5.5 kg*
2.06 kg

*) My own measurement

 

Links

 

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gerd (at) waloszek (dot) de

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made by walodesign on a mac!
31.03.2019