Auteur: Luc Régnier
Date: 28-09-2003 06:41
Bonjour,
The Development of the SWC Zeiss BiogonIn 1957 Hasselblad introduced a new Compur central shutter that enabled the cameras to be far more convenient and easy to use. The exterior of these lenses had an anodized brushed silver appearance. The optical design of the Biogon 38 was modified to make use of new and rather exotic glass types introduced by the SCHOTT glass works.In 1972 the exterior anodizing of Hasselblad’s Zeiss lenses changed from silver to black. Along with this change came Zeiss T* multi layer optical coating, a significant improvement to the optics. With this coating, the Biogon lens became more resistant to flare and ghosting. As a result, images become more brilliant and vivid with enhanced colour saturation. In 1982 another generation of Zeiss optics was introduced for Hasselblad. One main advance was the newly developed Prontor CF central shutter. Compared with the previous Compur shutter, the new Prontor offered a more rugged design, and thereby a longer service life, and a more convenient way of operation. The optical design was modified to make use of newly introduced glass types. At 200 line pairs per millimetre the 38 mm Biogon in the Hasselblad SWC 903 achieves a resolving power that goes beyond the capability of the best colour films presently available. The SWC has become a well-regarded documentation tool, capable of capturing vast amounts of information into a rather small frame.
Les principales différences du SWC par rapport au Biogon moderne :
- obturateur différent, compur pour les anciens
- traitement mono couche pour le SWC
- le formule optique a évoluée mais pas fondamentalement, il reste tjrs un exceptionnel Biogon, on ne change pas une formule gagnante .
Si vous faîtes du noir et blanc, pas de problème, ou alors essayez le pour voir ce qu'il donne en couleur . Celà dépend aussi du prix !
LR
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