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From a photograph taken by Mr. H. C. Russel, Director of the Sydney Observatory, with a portrait lens by Dallmeyer of 6 inches aperture and 32 inches focus, and an exposure of 8 hours. Scale of the Original 0.558 in.= 1°. The scale of this Enlargement is approximately 1.8 in.=1°

Direct Photo Engraving Company 9, Barnsbury Park.

Dimensioni
300 x 232 mm
Autore schedaMacaluso, Tiziana