Overview of All My Telescopes

Meade ETX-90EC | Meade 10" Dobson Lightbridge | Sky-Watcher Heritage 76 | Sky-Watcher Heritage 100P | Sky-Watcher Heritage P130 | GSO 8" Dobson GSD 680 | Sky-Watcher Heritage 114P Virtuoso | Sky-Watcher Skymax-102 OTA | Basic Data for My Current Telescopes | Links

On this page, I present some information about all the telescopes that I own(ed) - the past ones and the the current ones. Further below you will find a tabular overview of the basic data for the telescopes.

Note: Here is an overview of my current telescopes.

 

Meade ETX-90EC

Purchased in 1999 at the Pittsburgh airport and used for observing a solar eclipse in the same year. Sold at the end of 2009, because the telescope was not suited to observing deep sky objects (nebulae, galaxies) due to its focal ratio (f/13.8) - it is an ideal telescope for observing the moon and planets.

For details see pages Meade ETX-90EC Information and Meade ETX-90EC Equipment. For technical data see below.

 

Meade 10" Dobson Lightbridge

Purchased in October 2009. Sold in March 2016, because the telescope had become too heavy for me (the tubus weight was over 17 kg). This telescope delivered the best results of all telescopes that I had owned so far. I repleaced it with a GSO GSD 680 8" Dobson telescope, which is slightly lighter. Regrettably, I was not able to compare the two "big" telescopes.

For details see pagen Meade 10"-Dobson Information. For technical data see below.

 

Sky-Watcher Heritage 76

Purchased at the end of January, 2014, as a travel scope. Given away in March 2016, because I was not satisfied with the performance of this telescope - the Heritage 100P, which is a little bit larger, is clearly better. But I liked the small size and the usabulity of this nice little telescope.

For details see pages Sky-Watcher 3" Dobson Information and Sky-Watcher Dobson Heritage Comparison. For technical data see below.

 

Sky-Watcher Heritage 100P

I bought this telescope at the beginning of July 2015 as a travel scope, because I was not satisfied with the performance of the smaller Heritage 76. It is not as easy to transport as the 76, but performs much better (it has a parabolic mirror).

For details see pages Sky-Watcher 4" Dobson Information and Sky-Watcher Dobson Heritage Comparison. For technical data see below.

 

Sky-Watcher Heritage P130

Purchased in February 2010 (initially as a travel scope, but it is a little large for this purpose...). This telescope lies between "toy" telescopes and serious amateur telescopes. It is still fairly easy to transport and offers a surprisingly good performance (adjustable parabolic mirror with center mark). Negative points are an inaccurate focuser and the trembling platform.

For details see pages Sky-Watcher 5" Dobson Information and Sky-Watcher Dobson Heritage Comparison. For technical data see below.

 

GSO 8" Dobson GSD 680

Purchased at the end of March 2016. This telescope replaces my 10 "Lightbridge Dobsonian telescope, which had become too heavy for me. First experiences with this telescope look promising, but the weight is still fairly high for me...

For details see page GSD 680 8" Dobson Information. For technical data see below.

 

Sky-Watcher Heritage 114P Virtuoso

Purchased in May 2016. The Virtuoso mount, with which this telescope was delivered, makes it easier to show sky objects to other people, because it can track them (it might be extended with a hand box and thus, transformed into a GoTo telescope).

I returned this telescope after about a month, because my sample of the Virtuoso mount did not work properly. Instead, I acquired the Sky-Watcher Star Discovery AZ GoTo telescope mount (is being sold without a telescope tube).

For details see page Sky-Watcher 4.5" Dobson Information. For technical data see below.

 

Sky-Watcher Skymax-102 OTA

Skymax-102 on Heritage 100P base

Skymax-102 on Heritage 100P base, other side

Ditto, details (focuser, diagonal mirror)

Purchased at the end of May 2016. The Sky-Watcher Skymax-102 OTA (focal length 1300 mm) is a Maksutov-Cassegrain tube, which allows higher magnigifications than Newton telescopes of the same size. Therefore, it is useful for observing the sun, the moon, and the planets. Most of the time, I use the tube on the base of the Heritage 100P, but I also use it on the Sky-Watcher Star Discovery mount.

For details see page Sky-Watcher Skymax-102 OTA Information (4" Maksutov-Cassegrain). For technical data see below.

 

Basic Data for My Current Telescopes

Telescope
Meade
Sky-Watcher Skymax/Heritage
GSO
10" ETX 90EC 102 76 100P 114P P130 GSD 680
Optical Design Newton
(Parabolic)
Maksutov-Cassegrain Maksutov-Cassegrain Newton (Spherical) Newton (Parabolic) Newton
(Parabolic)
Newton (Parabolic) Newton (Parabolic)
Primary Mirror Diameter 254 mm 96 mm (90 mm) 102 mm 76 mm (3") 100 mm (4") 114 mm (4.5") 130 mm (5") 200 mm (8")
Focal Length, Focal Ratio 1270 mm
f/5
1250 mm
f/13.8
1300 mm
f/12.7
300 mm
f/3.95
400 mm
f/4
500 mm
f/4.38
650 mm
f/5
1200 mm
f/6
Resolving Power (arc secs) 0.45" 1.3" 1.15" 1.51" 1.15" 1.01" 0.9" 0.58"
Limiting Visual Stellar Magnitude ca. 14.5 mag 11.7 mag 12.7 mag 11.2 mag 11.8 mag 12.1 mag 13.3 mag 14.5 mag
Maximum Practical Visual Power ca. 600 x 325 x 204 x ca. 100 x (152 x) 150 x (200 x) 170 x (228 x) ca. 220 x (260 x) ca. 300 x (400 x)
Optical Tube Dimensions (diam. x length) 35 cm x 119 cm 10.4 cm x 27.9 cm 27 cm length n.a. 11.5 cm x 37 cm* n.a. Tube collapsed < 37 cm
(14.5") long
23 cm x 115 cm
Net Weight Basis 12.2 kg 3.5 kg (complete) --- 1.75 kg (complete) 1.3 kg* 1.6 kg 3.1 kg* 11.2 kg
Net Weight Optical Tube 17.2 kg 1.9 kg 1.2 kg*
(2.5*/2.8 kg complete)
3.7 kg
(5.3 kg complete)
3.25 kg*
(< 6.5 kg or 14 lbs. complete)
9.5 kg
(appr. 21 kg complete)

Dark blue: Telescopes that I still own; italic and dark red: telescopes that I owned; *) own measurement

 

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28.02.2017