Updated DX Model!
Key Features:
- Honders Advanced Catadioptric optical design
- Radiant Aluminium Quartz (RAQ)™ mirror coatings
- Wide-open 250mm focal length
- FAST f/2 focal ratio
- 125mm aperture diameter
- Lightweight 3.8kg
- 16mm image circle
- Collimatable primary mirror cell
- Rear primary mirror heliacal focuser
- Clamshell rings with a V-style dovetail
- Dual finderscope brackets
- 1.25-inch barrel
- Included accessories: 1.25-inch adapter, male and female M42x0.75
adapters, dew shield
This new HAC125DX (Honders Advanced Catadioptric) Minigraph is the smallest, fastest telescope dedicated to astrophotography available today.
This type of telescope, called an astrograph, is designed from the start to take photos of the night sky. You don't look through it, instead it connects to a dedicated astronomy camera from ZWO, QHY and others. This updated "DX" model features a rear focussing mechanism. The 16mm imaging circle well suited for IMX533 and IMX585 based cameras.
It's fast too, at just f/2.0. This means shorter exposure times and you won't even need to worry about autoguiding.
| Optical Specifications | |
|---|---|
| Optical Design | Honders Advanced Catadioptric |
| Mirror Coating | Radiant Aluminum Quartz (RAQ)™ Coatings |
| Reflectivity | 0.94% |
| Mirror Type (Monolithic/Conical/Fused conical) | Mangin |
| Corrector Coating | HTMC™ |
| Glass Type | Borosilicate |
| Primary Aperture (mm) | 125 |
| F/Ratio | 2 |
| Focal Length (mm) | 250mm |
| Image Circle | 16mm |
| Secondary Obstruction by Diameter | 53mm |
| Secondary Obstruction by Area | 0.425 |
| Primary cell supports (how many support points) | Rear Support |
| Optical Quality | Diffraction limited (1/4 wave) |
| Collimatable Cell | Primary |
| Mechanical Specifications | |
| Focuser Type | Primary focus |
| Focuser Size | Primary Mirror Helical |
| Focuser: Dual or Single Speed | Single |
| Compression Ring | No |
| Optical Tube length | 40cm |
| Optical Tube diameter | 16cm |
| Accessories | |
| Included finder | None |
| Mounting Hardware | Clamshell rings with V-style dovetail |
| Additional Accessories | 1.25" & M42x0.75 camera adapters |
| Manual | No |
| Case | No |
| Observational Info | |
| Dawes Limit | 0.93 |
| Rayleigh Limit | 1.12 |
| Limiting Magnitude | 12.96 |
