| AF500, 500MM TELESCOPE WITH CARBON OPEN TRUSS TUBE |
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| Product features: |
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| - Oldham Optics with Certificate of Conformity. |
| - Suprax glass optics (Zerodur on request) |
- Automatic main mirror and secondary
mirror covers with software control |
| - Remote operation possible. |
| - Choice of field flatteners and focal reducers. |
| - High strength carbon fiber tubing |
| - Microstep secondary mirror with software control. |
| - 3 cooling fans with control |
| - Feather touch double speed focuser for visual use. |
| - 18 points mirror support. | |
Cassegrain and Ritchey–Chrétien (RC) telescopes are used by professional observatories, research institutions and universities. The telescopes are made in open truss construction style with CFK-tubes and precision optics from Oldham Mirrors.
Customers can choose from the optical tube assembly (OTA) or the complete telescope system which can be set up in an equatorial or alt-az design. In combination with a focal reducer or field flattener, these instruments can also be used for large CCD sensors with diameters of 150mm and more and still display pin point stars all the way to the corners. |
Best configuration possible: Oldham optics inside!
Oldham Optics has established itself as a very reliable manufacturer of precision optics. Oldham mirrors are of the highest grade in the industry: If your aim is perfect imaging quality and you do not want to spend the few clear nights with inferior optics, then Oldham should be your choice. In order for the optics to provide optimal
corrections also during volatile thermal conditions, we only offer our optical sets in either Supramax ceramics. Oldham offers perfect quality parabolic mirrors, flat optics as well as Cassegrain- and RC-Systems. Contrary to other optic vendors we deliver every optical set with test certificate and interferogram. |
Astrofox designed and implemented many telescopes globally and all the optics delivered always more than have fulfilled their specifications.
System-wave front accuracy minimum L/8 Peak to Valley at 632 nm in focus
System-wave front accuracy minimum L/35 RMS at 632 nm in focus
Surface Quality 80/50 scratch/dig
Coating Aluminium and Quartz, other coatings like silver and gold upon request! |
Optical performance that will always perform on the seeing limit Both the Ritchey-Chrétien and Cassegrain telescope will need a corrector when used with large format CCD cameras. When comparing the performance of both systems, the Cassegrain will perform very similar to the RC but at a lower price. The benefit of the RC-design lies in the fact that the field correction without field flattener is slightly
better compared to the Cassegrain. The result will be a more rigid system that will increase the precision of the telescope. Since professional telescopes are used in fixed locations, the slight gain of weight will be more than offset by the prevailing benefits such as higher pointing and tracking accuracy as well as improved focusing precision |
| AF500 specifications |
| Aperture |
500 mm |
| Focal length |
4000 mm |
| Focal ratio |
F8 |
| Back focus |
350 mm (other on request) |
| Field of view |
86 arc mins (80 mm) |
| Mechanical specifications |
| Material |
High end alumnium and carbon fiber |
| Workmanship |
Hand made |
| Weight |
80 kg |
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| Image quality |
See spotdiagram |
| Cooling |
Computer controlled fans |
| Focuser |
Computer controlled focuser |
| Baffle |
Main mirror baffle | |
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| Main mirror specifications |
| Optical diameter |
500 mm |
| Mirror diameter |
510 mm |
| Mirror material |
Suprax |
| Coating |
Ai+Sio2 coating 96% refection |
| Surface quality |
L/8 PTV wavefront |
| Mirror thickness |
50 mm |
| Mirror cell |
18 point floatation |
| Secundary mirror specifications |
| Optical diameter |
180 mm |
| Mirror diameter |
185 mm |
| Mirror material |
Suprax |
| Coating |
Ai+Sio2 coating 96% refection |
| Tickness |
30 mm |
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| Click on picture to enlarge |
Click on picture to enlarge |
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| Optional equipment: prices excl VAT and factory |
| 4” field flattener corrector: |
on request |
| 4” reducer corrector: |
on request |
| 4" rotator |
on request |
| Mirror material Zerodur |
on request |
| Camera adapters |
on request |
| Different focal ratio |
on request |
| Mirror material Zerodur |
on request | |
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Ritchey–Chrétien (Standard configuration): |
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AF500 |
EUR 33500,-
excl.
VAT and
shipping |
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