The Projection Optics Story
An historical overview of Projection Optics, a small US-based manufacturer of projection lenses as well as images taken with some of their lenses, adapted onto digital cameras.
BelOMO / KП Projector Lenses
From the late-1970s and until well into the 1990’s the BelOMO optical works of Belarus (known before 1971 as MMZ) churned out many substantial projector lenses of variable design and quality, now cheaply available on the used market – sometimes referred to as ‘those Russian KP’ lenses. Mindful of Belarus’ technical independence from the former …
Kershaw Projection Lenses
Like its close rival Ross, the Kershaw brand dates to the latter half of the 19th Century, and was therefore among the first generation of makers to design lenses for projection. The story of A. Kershaw & Sons is briefly recapped in this article, explaining its intertwining with the Gaumont and Kalee brands en-route to …
The Ross Story
Company history Dating Clues: Premises and Branding Advertisements and catalogues show the domed square of the traditional Ross London and Ross Ensign logo giving way to a sleeker bowed cartouche with ‘Ross London’ in a double-decker arrangement during 1956. Restructuring and relocation of the company between 1955-1957 resulted in Ross the public limited company simply …
Leica Projector Lenses
Dust long having settled on the carcass of the industry, it seems in hindsight that Leica treated the production of domestic slide projectors more seriously than the Zeiss / Zett / Voigtlander combine. Leica’s catalogue of projector lenses represents the acme of the craft, matched by none for breadth and few for depth: for image …
90mm Projector Lens Group Test
Most makers of 35mm slide projectors offered a bread-and-butter plastic-barrel 85/2.8 and an optically superior upgrade that could be specified at purchase or retro-fitted. These lenses typically (though not always) jumped to 90mm but were always a little faster: commonly f2.4 or f2.5. The glass wasn’t just longer, it was deeper: deluxe options eschewed triplets …