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Hi

thanks for the prompt reply. This would be to fit onto the front of a zoom lens that we have.

Hi

I am trying to find closeup lens, with the following specifications. EFL 350+/-20 mm, F#5, preferably a cooke triplet or tessar. Any help would be appreciated

cheers

simon

DOF calculation, in french only, here http://www.galerie-photo.com/profondeur_de_champ_avec_calcphot.html
The focusing distance is measured from film or from lens to the subject.