Random triples
Subject | Object |
---|---|
gptkb:Maksutov–Cassegrain_telescope | Cassegrain configuration |
gptkb:Gregory-Maksutov_telescope | gptkb:Maksutov-Cassegrain |
gptkb:Leica_Summitar_lens | 7 elements in 4 groups |
gptkb:Porro_prism_binoculars | offset barrels |