Prosch Stereo Triplex Shutter With 5" Zeiss Anastigmat Lenses
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Prosch Stereo Triplex Shutter With 5" Zeiss Anastigmat Lenses:
The Prosch Manufacturing Co. was established by Cyrus Prosch in the early 1880’s in New York City, and remained in business for about 20 years – something of a record at the time. Their first product appears to have been an improved telegraph key (ca. 1882), but from that point on, they specialized in beautifully made camera shutters, and to a lesser extent, powdered magnesium studio flash units.
Over the years they offered at least eight models of their machined brass shutters in at least 13 sizes. Most were a heavy brass construction, but a few late models were made of aluminum or finished in oxidized copper over the brass. For a few dollars, Prosch would mount the customers’ lens into their shutter, increasing sales, and may be the reason why so few of the lenses seen today have any identification.
This example, a Stereo Triplex design with Serial Number 14215 (ca. 1893) and patent date of Nov. 29, 1886, is fitted with a set of 4 ¼”x6 ½” Zeiss Anastigmat Series IIA Stereo Lenses with focal lengths of 5” (+/-), and a patent date of Jan. 13, 1891. These optics are fitted with brass wheel stops calibrated in the Unified System with a maximum opening of US 4, making them f8 lenses. It measures 6 3/8” wide, 2 3/8” high, and 7/8” deep, and is mounted on a mahogany lensboard 6 ¼” wide, 4” high, and ¼” thick, but can be separated from this board by removing 6 countersunk flathead screws at the rear. The shutter cocks and fires at all three spring tensions (but remember to align the left side control linkages), and the lenses are clear with no visible separation or fungus. The brass body and lenses still have most of their original lacquer, and are bright with only a few age spots, and the flanges are original.
This shutter represents the very top of the line in Prosch equipment – it just doesn’t get any better than this.. Very few were sold, fewer survived, and so these are just not seen today. The overall condition of this Prosch Stereo Triplex Shutter with 5” Zeiss Anastigmat lenses is E+, and there is .
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1. Buyers understand that these offerings are photographic artifacts (antiques) and are not represented as necessarily usable for modern day photography. They have not been professionally checked for mechanical or optical quality.
2. U.S. Buters - Payments must be made by PayPal only and be received within 2 days (48 hours) after the close of the sale. All items will be shipped by USPS PRIORITY MAIL insured.
3. Overseas Buyers - Payments must be made by PayPal only and be received within 2 days (48 hours) after the close of the sale. All items will be shipped by USPS Priority Mail International insured. Note that I do not ship any items without insurance or declared for a lesser amount than the winning offer. All items will be declared as antiques, otherwise they will be as either used or obsolete with no commercual value.
4. Returns - U.S. buiyers: A full refund by PayPal will be given if an item is significantly different from the listing and returned in the original packing in the same condition as sent, within fourteen (14) days of end of sale. Buyer pays return postage. Overseas Buyers: Due to the handling of the item in Customs, there will be no refund and all sales are final.
5. offers from buyers with less that ten (10) positive responses, more than two (2) negative responses or private response will not be accepted.;