I would like to know if there is anyone that can answer this question: Wich is the best f stop of the Focotat 100m/m ? I know the best f stop of the 60mm, but not that of the 100m/m. Can you help me, please ? I'm using the f8 with good results, but I dont know if this one gives me the better rendition. Thank you. Fabio Fantazzini Brasil.

-- FABIO FANTAZZINI (fabiofan@bestway.com.br), May 27, 1999

Answers

Um... you could do some tests. Film flatness and enlarger alignment are important factors too. Make some big prints at different f-stops and see which looks best.

-- Tim Brown (brownt@ase.com), May 27, 1999.

For the 100 V-Elmar the best aperture is f11. For the 100 Focotar-2, it is f8, but Leica states that f5.6 is fully usable.

-- Eilert Anders (eilert@dav.com), May 28, 1999.

Oi Fabio, Vc pode adquirir um target de teste (fotograma com linhas gravadas usadas em testes de objetivas), projetar com o seu ampliador em uma tela (como se fosse uma leitora de microfilme) e checar todas as aberturas de sua lente, dentro do tamanho de suas ampliacoes e pronto.

-- julio de oliveira (jjdeoliveira@hotmail.com), August 09, 1999.