| Telescope |
Bresser
|
Meade
|
Sky-Watcher Skymax/Heritage/Explorer/StarTravel
|
GSO | Omegon | Celestron | Celestron | TS-Optics | ||||||||
| Venus 76/700 AZ | 10" | ETX 90EC | 102 | 127 | 76 | 100P | 114P | P130 | 150PDS | ST120 | GSD 680 | PS 72/432 | C5 | C8 | TLAPO1027 | |
| Optical Design | Newton | Newton (Parabolic) |
Maksutov-Cassegrain | Maksutov-Cassegrain | Maksutov-Cassegrain | Newton (Spherical) | Newton (Parabolic) | Newton (Parabolic) |
Newton (Parabolic) | Newton (Parabolic) | Refractor | Newton (Parabolic) | Refractor (Doublet) |
Schmidt-Cassegrain | Schmidt-Cassegrain | Refractor (Triplet) |
| Primary Mirror Diameter | 76 mm (3") | 254 mm | 96 mm (90 mm) | 102 mm (4") | 127 mm (5") | 76 mm (3") | 100 mm (4") | 114 mm (4.5") | 130 mm (5") | 150 mm (6") | 120 mm (4.7") | 200 mm (8") | 72 mm | 125 mm | 203 mm | 102 mm |
| Focal Length, Focal Ratio | 700 mm f/9.2 |
1270 mm f/5 |
1250 mm f/13.8 |
1300 mm f/12.7 |
1500 mm f/11.8 |
300 mm f/3.95 |
400 mm f/4 |
500 mm f/4.38 |
650 mm f/5 |
750 mm f/5 |
600 mm, f/5 | 1200 mm f/6 |
432 mm f/6 |
1250 mm f/10 |
2032 mm f/10 |
714/715 mm f/7 |
| Resolving Power (arc secs) | 1.51" | 0.45" | 1.3" | 1.15" | 0.91" | 1.51" | 1.15" | 1.01" | 0.9" | 0.77" | 0.96" | 0.58" | 1.61" ** | 0.93" | 0.57" | 1.15" |
| Limiting Visual Stellar Magnitude | 11.2 mag | ca. 14.5 mag | 11.7 mag | 12.7 mag | 13.2 mag | 11.2 mag | 11.8 mag | 12.1 mag | 13.3 mag | 12.7 mag | 13.1 mag | 14.5 mag | 11.1 mag ** | 13 mag | 14 mag | ca. 12 mag |
| Light Gathering Power | 117.9 | 1316.7 | 165.3 | 212.3 | 329.2 | 117.9 | 204.1 | 265.2 | 344.9 | 459.2 | 290 | 816.3 | 105.8 ** | 319 | 841 | 212.3 |
| Maximum Practical Visual Power | 152 x | ca. 600 x | 325 x | 204 x | 254 x | ca. 100 x (152 x) | 150 x (200 x) | 170 x (228 x) | apr. 195/220 x (260 x) | apr. 225 x (300 x) | 240 x | apr. 300 x (400 x) | 144 x | appr. 250 x | appr. 400 x | 204 x |
| Optical Tube Dimensions (diam. x length) | n.a. | 35 cm x 119 cm | 10.4 cm x 27.9 cm | 11.6 cm x 27 cm | 14.4 x 33 cm | n.a. | 11.5 cm x 37 cm* | n.a. | Tube collapsed < 37 cm (14.5") long |
18.2 cm x 69 cm 18 cm x 68 cm* |
116/142 mm x 660 mm | 23 cm x 115 cm | L: 39.5 cm with extended dew cap | 15 cm* x 28/33 cm | 23.8 cm x 43.2 cm | 10.5/12.6 cm x 61.5 cm (transport size) |
| Net Weight Basis | n.a. | 12.2 kg | n.a. | --- | --- | n.a. | 1.3 kg* | 1.6 kg | 3.1 kg* | -- | --- | 11.2 kg | n.a. | n.a. | n.a. | n.a. |
| Net Weight Optical Tube | n.a. | 17.2 kg | n.a. | 1.9 kg | 3.4 kg | n.a. | 1.2 kg* | 3.7 kg | 3.25 kg* | 5.0/6.0 kg 5.5 kg* |
4.0 kg | 9.5 kg | 2.06 kg | 5.7 kg | 2.72 kg | 5.6 kg |
| Net Weight Complete | n.a. | 3.5 kg | 1.75 kg | 2.5*/2.8 kg | 5.3 kg | < 6.5 kg or 14 lbs. | apr. 21 kg | n.a. | n.a. | n.a. | n.a. | |||||
Dark Blue: Telescopes that I still own (or ordered); italic and dark red: telescopes that I owned; black: for comparison purposes; *) own measurement; **) corrected values