I can't hear well, but I can listen!
Takahashi TOA-150 B
Takahashi EM-400 Temma 2M
Handheld Algiz 7
Kagayaki IV Pro
Meade 8" f/6.3 SCT / STF8300C
Orion ED80 / LS75FHa2/B1200 / DMK41AF02
Coronado SolarMax 70 CaK / DMK 31AU03
Quote:Why is the double stack 35mm not good for visual?
Bob diagonally parked in a parallel universe...
Quote:I must caution against the use of a Lunt blocking filter with any Coronado etalon in the light path. The differences in the basic design do not support that configuration. Marc
I understand the design differences, and that the etalons have different free spectral ranges, but as long as the blocking filter is narrow enough to block the off band modes from one of the etalons things should be no worse than they were single stacked. Better, in fact if the two etalons have different FSRs. Joe
Quote:If Coronado + Lunt etalons are used in double stack, there is no difference which BF is used. Pawel