With any lens, the maximum magnification is infinity - that's when the subject to the lens distance is equal to the lens focal length. It is the minimum magnification that is dependent on the lens coverage compared to the film format used.
And the image perspective is dependent on the lens to the subject distance which in turn is dependent on the lens focal length.
The f/9 CZJ Apo-Tessars cover 57°; that means the linear coverage at infinity to be slightly more than the lens focal length (so the 300mm Apo-Tessar just covers 8x10" without movements). The 1200mm Apo-Tessar is slower than f/9 so its diameter is less, and the barrel makes more vignetting so the 1200's angle is less than its shorter focal length cousins'.
The 6-element 1200mm f/15 LOMO PM-1 covers 53° (120cm / 47.5") at infinity.
The Rodenstock Apo-Rionar-CL 1200mm f/16 covers 126cm / 49.5" at infinity.
That means that with the PM-1 lens, you are able to take any pictures from about 1/3 life-size with about 16 feet between the lens and the subject to any greater magnification with closer distances on 40x50".
P.S.: PM sent.
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