Keywords: B35 Zeiss Triotar40mm.jpg The Carl Zeiss 40mm Triotar lens on a Rollei B35 referred to in Jacobson's lens tutorial http //www faqs org/faqs/rec-photo/lenses/tutorial/ The dots represent DOF limits for f/8 and f/16 accorind to the Rollei B35 manual; the dots indicate that the lens is focused at approximately the hyperfocal distance for f/16 about 13 feet Jacobson's inferred circle of confusion diameter using <math> c f\ 2 / N H </math> was about 0 025 mm author source 2006-02-25 David Jacobson OTRS permission 2016051710018796 David Jacobson Original upload log en wikipedia B35_Zeiss_Triotar40mm jpg wikitable - 2006-02-26 04 50 368×269× 52904 bytes Dicklyon Image shot today at my request by David Jacobson for use on the Zeiss formula wikipedia page and released by him into the public domain Rollei 35 |