Technical
The Neptune Convertible Art Lens System has been handcrafted using the finest optics and utmost care. Each element is multi-coated, and the lens base has been specially designed to ensure that you can change the front lens without exposing the mirror or sensor to dust or dirt and keep your lens in pristine condition. With three elements in three groups in the lens base and four elements in four groups in each of the interchangeable front lenses, this Art Lens System delivers exceptional quality at each of its fixed focal lengths. It is available in Canon EF, Nikon F or Pentax K mount, and compatible with a wide range of other cameras using adapters available from Lomography.
- Mount types: Canon EF, Nikon F, Pentax K
- Lens Focal length: 35mm, 50mm, 80mm, front element group convertible
- Front element group mounting mechanism: bayonet mount
- Aperture: 3.5/35 + extended, 2.8/50, 4.0/80+ extended
- 35mm: extended and f/3.5 - f/22
- 50mm: f/2.8 - f/22
- 80mm: extended and f/4-f/22
- Aperture type: multi-scaled diaphragm + drop in aperture plates
- Filter Thread: 52mm
- 35mm: 63°
- 50mm: 46°
- 80mm: 30°
- Closest Focusing Distance: 0.25m (35mm), 0.4m (50mm), 0.8m (80mm)
- 35mm: 0.25m
- 50mm: 0.4m
- 80mm: 0.8m
- Multi coating: yes
- Rear lens base: 3 elements in 3 groups
- Front lens group: 4 elements in 4 groups for each focal length
- Lens body: aluminum
- Lens Coating: multi-coated
- Electronic Contacts: no
- Focusing Mechanism: helicoid
