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Yunon Optical Leo-35 favori envoyer Print
Photos by RP text by RP. From the collection of RP
France Version française

Chronology of the Yunon Optical brand  New window

Manufactured in Taïwan from Circa 1985 until 0.
Index of rarity in France : Rare (among non-specialized garage sales)
Sold listing on New window
Inventory number: 2936

See the complete technical specifications New window
Yunon Optical Leo-35

The Leo-35 is a clone of the Yunon 600, and was probably made or assembled by the Yunon Optical Company. It may also be exclusive to Australia and New Zealand. Cameras of this genre were made to give away at corporate promotions or as fairground prizes. Some may also have been sold by mail order in the USA.

The lens has focal length about 42mm and the maximum aperture is about 4mm diameter (i.e. about F10-11). At the minimum aperture about 50% of the lens remains open (i.e. about F16). The aperture is formed by a slot of varying width behind the shutter. The film plane is curved. The camera has about 110 grams of metal in the base, to give the impression of quality, but it can really only be compared to a cheap Instamatic. A label on the back of the camera reads "Quality Passed YN85 1". The instructions recommend the use of ASA100-125 film; ISO replaced ASA in about 1985.

The Yunon 600 was sold in the USA in silver and black and all black versions, and also under the names Promax PX600, Ninoka nk700 and Sceptre YN800