Product Description
VELOSTIGMAT
Reg. U. S. A. Pat. Off.
SERIES Ia f6.3-f7.7
TRIPLE CONVERTIBLE... TRIPLE ANASTIGMAT
The distinct advantage of the Series Ia Velostigmat is its triple convertibility. Both the front and rear elements are of longer focus than the doublet and are fully corrected so the user has virtually three fine anastigmat lenses in one.
Long focus lenses are essential for good commercial photography where true perspective, good drawing, larger images or telephoto effects are desired. By using the single elements of the Series Ia Velostigmat these results can be obtained. In using the single elements it is necessary only to stop the diaphragm down slightly to secure accurate definition.
The Series Ia Velostigmat produces fine definition, absolute rectilinearity, flatness of field and is especially well corrected for chromatic aberration, the essentials that make up a really finely corrected anastigmat lens.
The doublet has a moderate focal length and operates at high speed. These qualities added to its anastigmatic corrections make it ideal for general all-round work, including groups, landscapes, general views, copying, enlarging, and all commercial and architectural photography. In short, as a speedy anastigmat the doublet is essential for all-round use. Its fine chromatic corrections make it suitable for color separation work.
The commercial photographer or the advanced amateur who wants to combine convenience, versatility and moderate price, will find the Series Ia Velostigmat an excellent investment.
THE SERIES Ia VELOSTIGMAT FOR BANQUET CAMERAS
Besides being a perfect anastigmat with a flat field the Series Ia Velostigmat has an exceptionally large circle of illumination and will cover plates larger than those for which it is listed. This makes it particularly well suited for use with banquet cameras. The following table lists the sizes that are recommended for these cameras.
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