Neptune Convertible Art Lens System Review
January 24, 2018
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Amy Davies
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Specifications
- Lens Focal length: 35mm, 50mm, 80mm, front lens group convertible
- Front lens group mounting mechanism: bayonet mount
- Aperture type: multi-scaled Diaphragm + drop in aperture plate
- Multi-scaled diaphragm aperture: 35mm: extended and f/3.5 - f/22, 50mm: f/2.8 - f/22, 80mm: extended and f/4-f/22
- Field of View: 35mm: 63°, 50mm: 46°, 80mm: 30°
- Filter Thread: 52mm
- Focusing Mechanism: Helicoid
- Closest Focusing Distance: 0.25m (35mm), 0.4m (50mm), 0.8m (80mm)
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- Macro Adapter: 0.18m (35mm), 0.22m (50mm), 0.5m (80mm)
- Lens Construction: Lens base: 3 elements in 3 groups, Front lens group: 4 elements in 4 groups for each focal length
- Multi coating: Yes
- Electronic Contacts: No
- Lens body: Aluminum