The B+W 55mm Close-up +1 Lens (NL1) is a close-up diopter lens which allows you to decrease the minimum focus distance on any lens, in turn increasing the effective maximum reproduction ratio of your lens. Additionally, you can combine close-up lenses to increase their strength and to fine tune your close-up settings.
Ideal for telephoto and zoom lenses with a near focusing distance of approximately 1m (3.3') resulting in a focusing range without a gap. With the 35mm format, it is ideal for lenses with focal lengths between 85mm (up to approx 1:5) and 200mm (up to approx 1:3). On a 50mm lens, start with the NL2 close-up lens.
B+W filters are constructed from high quality Schott glass for increased optical clarity and color fidelity. This filter has a single anti-reflective coating, which helps to improve light transmission to over 98% while preventing internal reflections and ghosting. Additionally, it features a brass filter ring for increased durability as well as jamming prevention.
| Type | Close-up lens/diopter |
| Size | 55 mm |
| Dioptric Strength | +1 |
| Filter Factor | N/A |
| Multi-Coated | Single coated |
| Effect | Decreases minimum focus distance on any lens |
| Construction | Schott glass |
| Front Filter Thread Size | 55 mm |
| Front Lens Cap Size | 55 mm |