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B+W 23335 NL4 Close-Up Lens +4 Diopter — main product image
B+W

B+W 23335 NL4 Close-Up Lens +4 Diopter

★★★★★4.6 (45 reviews)

Turn your existing 37mm-threaded lens into a macro tool with the B+W NL4 close-up filter's precision +4 diopter glass.

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Overview

The B+W NL4 Close-Up Lens is a screw-in filter that reduces your lens's minimum focusing distance, enabling you to capture detailed close-up images without investing in a dedicated macro lens. With a +4 diopter rating and a 37mm thread size, it's designed for smaller lenses and delivers noticeable magnification for subjects like flowers, insects, jewelry, and product photography. B+W manufactures the filter using high-quality optical glass and applies rigorously tested coatings to preserve sharpness and minimize flare or ghosting.

As a single-element design, the NL4 keeps weight and bulk to a minimum—simply screw it onto the front of a compatible lens, and you're ready to shoot. This makes it especially appealing for photographers who want macro capability on the go without adding significant gear to their bag. While a dual-element achromatic close-up lens would offer even sharper edge-to-edge performance, the B+W NL4 strikes a practical balance between optical quality, portability, and cost for photographers exploring close-up work.

Key Features

Box contents: NL 4 close-up 4 E 37 Lens

Specifications

Brand
B+W
Model
23335
Type
Close-Up Lens (Filter)
Diopter
+4
Thread Size
37mm (E 37)
Focal Length Description
35mm

Pros & Cons

👍 Pros

  • Affordable way to achieve close-up magnification without buying a dedicated macro lens
  • High-quality optical glass with tested coatings minimizes image degradation
  • Compact and lightweight—adds virtually no bulk to your lens setup
  • Simple screw-on attachment requires no tools or modifications

👎 Cons

  • 37mm thread size limits compatibility to a narrow range of smaller lenses
  • Single-element design may show some softness at the edges compared to dual-element close-up lenses
  • Fixed +4 diopter strength offers no adjustability for varying magnification needs
  • Reduces working distance significantly, which can make lighting the subject more challenging

Frequently Asked Questions

This is a +4 diopter close-up lens, which provides a significant reduction in minimum focusing distance for detailed close-up photography.
The B+W NL4 fits lenses with a 37mm filter thread (E 37 mount).
The B+W NL4 is a single-element close-up lens manufactured with high-quality optical glass and rigorously tested coatings for sharp results.
Yes, like standard screw-in filters it can be stacked, though adding multiple filters increases the risk of vignetting, especially on wide-angle lenses.
No. The NL4 screws onto the front of your lens and does not interfere with the camera's autofocus system.

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