The Revue 1:4/24mm lens with M42x1 mount.
This is a cheap plastic (bakelite) lens. However, it is an OEM version of the rare Enna München Lithagon/Ennalyt 24/4 from the 1960s. It was sold by Quelle trade company under the brand name Revue and later as Revueon.
(Lens made in W.Germany)
Optical design: 7 elements in 7 groups (no cemented elements).
I have an early version with preset aperture. Quite an unusual design. You have to press the lock button to preset the aperture (only five values: f/4, f/5.6, f/8, f/11, f/16).
And the grip of the aperture closing ring is not all the way around. But it's okay to use.
Later versions of the lens had "automatic" aperture control.
Only 5 aperture blades, which is normal for a wide angle lens.
The lens is not too big, but not small either. The filter thread is 52mm.
Unfortunately, the bakelite construction of the lens is not good for long term use: low accuracy and high wear. My copy turned out to be much worse than the seller promised. The focus ring is very stiff, strong looseness, haze optical elements, and heavy decentering.
I serviced the lens, it got better, but still far from perfect, unfortunately.
The lens is not very good for landscapes. The center is good, but the edges and corners are low resolution. Worse than the Вариозенитар (Variozenitar) 25-45/2.8-3.5, it seems to me.
But this lens has a very short minimum focusing distance: 170-175mm from the film/sensor plane, and that's about 65mm from the front optical element. That's very close.
Accordingly, the maximum magnification is 1:3.1, x0.32. This is very good for an old wide angle lens. You could even call it a macro lens in terms of film lenses. This is the main highlight of the lens.
See also related notes:
- ISCO Iscovitar 50/2.8 (M42x1/45.5): Triplet with simple focusing mechanism (2024-05-21)
- Lenses without cemented elements (2023) (2023-10-12)
- Revue 24/4: My experience [2/2] (2023-09-18)
- Revue 24/4: My experience [1/2] (2023-09-17)
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