國內望遠鏡廠 冠昇光學自製RC鏡.國內外已開始試賣...價格8吋 7,8萬到6吋 4萬左右...那模小的口徑,二次鏡的遮敝率.....? RC的二次鏡和像場彎曲修正透鏡規格都未知?整體性能表現尚無公告....
大家參考....
GSO has designed two new Ritchey-Chretien (RC) telescopes of the highest quality level. The telescopes will have an excellent optical and mechanical quality, innovative features such as a Carbon Fiber tube, and above all they will be very affordable! News will soon be published in our new Online Shop!
Available apertures:
152 / 1370mm
203 / 1928mm
http://www.teleskop-service.com/RC/start/RCstart.html#toscano另一款是Toscano公司的RC鏡規格.
8" F9 Toscano RC
Specifications:
- Primary and secondary mirror substrate: Pyrex
- Secondary mirror diameter: 71mm
- Linear obstruction: 35.5%
- Diffraction limited field of view: 16mm diameter
- 90% field illumination: 54mm diameter
- 100% field illumination: 19mm diameter
- Back focus: 200mm
- Tube weight: 8kgs
- Focuser: Crayford focuser with 1:10 dual speed microfocuser
- Optical quality:
Standard optics: 1/20 wave RMS surface quality per optical surface
Deluxe optics: 1/40 wave RMS surface quality per optical surface
Prices:
Standard optics = 2775.- Euros (incl. VAT)
Deluxe optics = 3465.- Euros (incl. VAT)
10" F9 Toscano RC
Specifications:
- Primary and secondary mirror substrate: Pyrex
- Secondary mirror diameter: 87mm
- Linear obstruction: 35%
- Diffraction limited field of view: 20mm diameter
- 90% field illumination: 54mm diameter
- 100% field illumination: 19mm diameter
- Back focus: 250mm
- Tube weight: 13kgs
- Focuser: Crayford focuser with 1:10 dual speed microfocuser
- Optical quality:
Standard optics: 1/20 wave RMS surface quality per optical surface
Deluxe optics: 1/40 wave RMS surface quality per optical surface
Prices (with standard focuser):
Standard optics = 4710.- Euros (incl. VAT)
Deluxe optics = 5585.- Euros (incl. VAT)
