Pecole Posted February 27, 2011 Share #1 Posted February 27, 2011 Advertisement (gone after registration) Adjusting the aperture diaphragm of the "old" 5cm Elmar without touching the front lens requires some care. But when the Elmar is "hooded", it is a nightmare and a significant waste of time. Leitz has - of course - provided a solution with its small VOOLA ring. When the Elmar is used - inverted! - on an enlarger or a copying stage (sliding or rotating), the problem is worse, and the Leitz solutions a little more sophisticated : VALAU or VALOO hoods/rings. And finally, at least for the first case when the Elmar is "hooded" and mounted on a Leica, somebody (is it Leitz?) had the brilliant idea of "intergrating" the FISON-VOOLA assembly, in simply riveting an actuating "fork" inside the FISON. Link to post Share on other sites More sharing options...
Advertisement Posted February 27, 2011 Posted February 27, 2011 Hi Pecole, Take a look here Fontenelle archives 56 : actuating the diaphragm.... I'm sure you'll find what you were looking for!
luigi bertolotti Posted February 27, 2011 Share #2 Posted February 27, 2011 Interesting the last... but I think it's not a Leitz-made modification... a bit rough-looking, indeed... and you haven't an external ref to the stop you set rotating the hood...: btw. do you have to rotate the whole hood body, releasing the clamping screw, or has been the FISON modified to allow indipendent rotation of the cylindrical front part ? It can be... but not so clear looking at the picture. Link to post Share on other sites More sharing options...
doubice Posted February 27, 2011 Share #3 Posted February 27, 2011 Luigi, Even the VOOLA / FISON combination required rotation of the whole asembly to change the f-stop. And - the only way to find out which f-stop was set, was to peek inside the hood. The best solution to the problematic f-stop setting if one wished to use a hood on the 50mm Elmar was the VALOO hood / ring, which was originally designed for darkroom use.... In many Leitz catalogues it was listed as an accessory for the Valoy enlarger and could not be found among regular lens hoods . Best, Jan Link to post Share on other sites More sharing options...
Pecole Posted February 28, 2011 Author Share #4 Posted February 28, 2011 Interesting the last... but I think it's not a Leitz-made modification... a bit rough-looking, indeed... and you haven't an external ref to the stop you set rotating the hood...: btw. do you have to rotate the whole hood body, releasing the clamping screw, or has been the FISON modified to allow indipendent rotation of the cylindrical front part ? It can be... but not so clear looking at the picture. doubice has given the right answer, Luigi. I will just add that the VALOO was indeed designed for use on enlargers - and marketed accordingly - but was immediately used as lens hood by numerous Leica enthusiasts, and also used as diaphragm setting ring when the lens was mounted upside-down on sliding or rotating focusing stages (OOZAB, OORES etc..). Link to post Share on other sites More sharing options...
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