Hallo,
Zunächst:
4 inch F/6 Home made Refractor: This refractor is based on the 4 inch two element lens sold by Apogee inc. for 300 USD. Lens cell made of aluminum
Frage:
Taugen die Apogee Objektive was? Jemand erfahrungen mit solchen Linsen?
Gruß,
NGC!
