Spectrometer 6" circle, 30 seconds of an arc, vernier readable by two opposite verniers.
RSP-601 | Spectrometer 6" circle, 1 minute of an arc, vernier readable by two opposite verniers. | |
RSP-630 | Spectrometer 6" circle, 30 seconds of an arc, vernier readable by two opposite verniers. | |
RSP-701 | Spectrometer 7" circle, 1 minute of an arc, vernier readable by two opposite verniers. | |
RSP-730 | Spectrometer 7" circle, 30 seconds of an arc, vernier readable by two opposite verniers. | |
RSP-720 | Spectrometer 7" circle, 10 seconds of an arc, vernier readable by two opposite |