Gemini Bt. - 2091 Etyek, Alsohegy u 7 - Hungary Tel +36 70 332 7090 - astronomy@astronomy.hu
G42 Observatory+
This mount is the solution for either a small to medium observatory or a portable, yet stable and precise tracking platform. It offers a backlash free, smooth motion in both axes. The slip clutch fastens gradually and the clutch handle itself is adjustable. The controls are straightforward and easy to access. The stability is exceptional considering the head weight. The GoTo capability is limited by considerations of mechanical wear only: with a 24V power supply speeds of 6 deg/sec (with Pulsar) are normal. The tube/counterweight ratio is exceptionally good, which means that your equipment will be balanced with the minimum amount of counterweight. Only high quality materials are used for a completely "stainless" design.
The design concept of the G-42 Obs+ is the result of 10 years of R&D and user feedback on previous models. It offers first class tracking quality, simple use and outstanding reliability.
The G-42 Obs+ has CNC machined high grade anodised aluminium main structural elements and shafts. Both axes are held securely by 2pc oversized tapered roller bearings (each have over 600 kg loading capacity). The worm supports are spring loaded so that you never have backlash. The polar scope is attached to the DEC head by a 300mm long beam to provide confortable sighting under all conditions and at far Northern/southern latitudes. All necessary cable connections are wired into a single DB15 connector placed close to the center of rotation which means minimum cable problem during goto.
The G-42 Obs+ has CNC machined high grade anodised aluminium main structural elements and shafts. Both axes are held securely by 2pc oversized tapered roller bearings (each have over 600 kg loading capacity). The worm supports are spring loaded so that you never have backlash. The polar scope is attached to the DEC head by a 300mm long beam to provide confortable sighting under all conditions and at far Northern/southern latitudes. All necessary cable connections are wired into a single DB15 connector placed close to the center of rotation which means minimum cable problem during goto.
Main features of the G-42 Observatory+ (when used with Pulsar2 driver)
- Sidereal, Lunar, Solar and 2 custom tracking rates
- Up to 6 deg/sec GoTo speed (with 24V power supply)
- 25mm polar shaft bore for cable routing to CCD
- Accurate 12x30 polar finder with illumination (optional)
- LX200 (most commands), PemPro and ASCOM compatible
- Reference stars, M, NGC, IC, Pk and custom programmable database
- Default or programmable meridian flip limits (for robotic mode and safe goto)
- Parking also via external switch (cloud detector) - when the PC breaks down
- Real time refraction correction (for tracking and goto)
- Pulse guiding or RJ11 cable guiding direct from the CCD
- GPS connection for time and geographical position download (optional cable needed)
- Effective PEC with worm rotation encoder (PE below 2" ptv with PEC, at any sky position)
- Free firmware updates, language versions
- 5 years of warranty for mechanical parts, 2 year for electronics
New: Parking sensors for remote recovery after system breakdown (optional)
New: Factory programmed PEC (optional)
- Up to 6 deg/sec GoTo speed (with 24V power supply)
- 25mm polar shaft bore for cable routing to CCD
- Accurate 12x30 polar finder with illumination (optional)
- LX200 (most commands), PemPro and ASCOM compatible
- Reference stars, M, NGC, IC, Pk and custom programmable database
- Default or programmable meridian flip limits (for robotic mode and safe goto)
- Parking also via external switch (cloud detector) - when the PC breaks down
- Real time refraction correction (for tracking and goto)
- Pulse guiding or RJ11 cable guiding direct from the CCD
- GPS connection for time and geographical position download (optional cable needed)
- Effective PEC with worm rotation encoder (PE below 2" ptv with PEC, at any sky position)
- Free firmware updates, language versions
- 5 years of warranty for mechanical parts, 2 year for electronics
New: Parking sensors for remote recovery after system breakdown (optional)
New: Factory programmed PEC (optional)
The GHS MkII tripod is the ideal solid base for your G-42. It ensures that stability is not compromised by wobbling tripod legs...The MkII model has 8 cm independent leg adjustment, d120x5mm central pier, d 60x5mm legs and a legendary stability confirmed by many satisfied customers. The Qlock system saves you a lot of frustration in the dark - you just put the mount head on, turn a handknob on the pier and it's done.
The unique Direct Drive System provides you with complete freedom from backlash and the large periodic error associated with gear trains. The mount reacts to your commands instantly - just as you would expect from a high precision drive system. It uses the possible smallest number of parts - as a result it is reliable and compact. Another benefit of the Direct Drive System is the high slewing speed of the stepper motors. To see some results with Gemini mounts either look at the Gemini Gallery or see one of our customer's sites!
The original polar scope Gemini HP2 uses three stars for alignment for high precision and freedom from reading star charts. You just find the position when the three circles on the reticle match the stars. It is more accurate than traditional "Star Drift" methods. The large 30mm objective lens lets you see enough stars for a precise alignment. The 12x magnification provides the accuracy needed for GoTo and astrophotography.
Data sheet of G42 Observatory+
We have developed a new PE testing unit that allows us to workbench test the mounts before shipping. The PE diagram is supplied with the mount. To see an example download the pdf below! Small scale ripple in the diagram is the result of rounding errors in calculations.
Example of PE diagram
A guide to using a bluetooth device and palmtop (Christinan Wallash)
".... on the occasions I could go out under the stars the Gemini worked just perfectly! You just feel that it's a quality product."
P.Bakker - Netherland
P.Bakker - Netherland
"The first real use was a success. The tripod is VERY STABLE!!!!..."
G.W. - Austria
G.W. - Austria
Telescope platform size
Tripod interface
Prices in EURO
| G-42 with motor cables | 3700,00 |
| No DEC cable option | Included |
| Transport case | 100,00 |
| GHS MkII Qlock tripod packing | 840,00 |
| Gemini HP2 Polar scope (illuminator not supplied) | 180,00 |
| Permanent setup adapter | 80,00 |
| Universal adapter plate | 40,00 |
| Losmandy adapter | 140,00 |
| Losmandy rail, 40cm lang, 1cm stark, schwarz Alu | 50,00 |
| Counterweight 9kg | 100,00 |
Shipping and tax is not included. You will pay 25% sales tax (EU orders only) that you can deduct and pay the rate applicable in your country.
General dimensions of the G42 (for observatory planning)
Collimation and alignment - Gemini HP2 (video 3MB)