NiSi Lens 15mm F4 L-Mount

NiSi Lens 15mm F4 L-Mount – Ultra-wide 112° Field of View for Mirrorless Filmmaking and Photography

The NiSi 15mm F4 L-Mount is an ultra-wide, lightweight lens designed for mirrorless cameras. Weighing 470 grams, it offers portability for field work and travel. Use it for nature, astrophotography, street, action, and creative portrait work when you need a dramatic, ultra-wide perspective.

Ultra-wide optic and true focal length

The lens delivers an impressive 112° field of view, which is wider than the regular angle expected from a standard 15mm lens. In practice, this field of view is equivalent to a 14.5mm focal length, giving you a broader scene capture while keeping a compact form factor.

Optical design for clarity and low aberration

The optical construction consists of 12 elements in 10 groups. It includes one double-sided aspherical element and two extra-low dispersion elements to minimize chromatic aberration and distortion. Thanks to this construction, the lens also reduces vignette, maintaining usable corner performance across the frame.

Additionally, the lens uses anti-reflection film technology. This treatment improves light transmittance and helps reduce lens flare and stray light, which is especially useful for high-contrast scenes and astrophotography.

Aperture and starburst performance

The lens features ten straight aperture blades. As a result, it can produce distinct starbursts from f/4 to f/22. Notably, the optical construction prevents glare within the starburst, allowing you to create this effect without needing to stop down to very small apertures.

Build quality and handling

The housing uses an all-metal construction that adds durability and reliability in demanding shooting environments. The focus ring operates on a ball bearing mechanism, providing smooth, controlled movement and accurate manual focus adjustments. Both the front and rear elements receive matt paint anti-reflection treatment to help avoid surface glare.

Filter compatibility and close-focus capability

The lens accepts standard 72 mm circular filters via its front thread. It also supports NiSi’s popular 100 mm filter holder systems, making it easy to add graduated or square filters when required. The minimum focal distance is 0.2 m, enabling strong foreground emphasis and creative close-up compositions with an ultra-wide perspective.

Who should consider this lens

• Photographers and filmmakers who need an ultra-wide perspective on mirrorless cameras.
• Astrophotographers and landscape shooters who require a wide field of view and reduced flare.
• Street and action shooters who value a lightweight, durable lens for portable setups.
• Creators exploring creative portrait and close-foreground compositions using a very short minimum focus distance.

Key specifications

• Lightweight and portable design — 470 grams
• 112° field of view (equivalent to 14.5mm focal length)
• Optical construction: 12 elements in 10 groups
• One double-sided aspherical element and two extra-low dispersion elements
• Ten straight aperture blades producing starbursts from f/4 to f/22
• Minimum focal distance: 0.2 m
• 72 mm front thread for standard circular filters
• Supports NiSi 100 mm filter holder systems
• All-metal housing with matt paint anti-reflection on front and rear
• Ball bearing focus ring for smooth, accurate adjustments
• Anti-reflection film technology to improve light transmittance and reduce flare

FAQ

Question: Is this lens suitable for mirrorless cameras?
Answer: Yes. The NiSi 15mm F4 is designed for mirrorless systems and is offered here in the L-Mount version, making it ready for compatible mirrorless bodies.

Question: Can I use standard filters with this lens?
Answer: Yes. The lens has a 72 mm front thread for standard circular filters and also supports NiSi’s 100 mm filter holder systems for square or graduated filters.

Question: How close can I focus for dramatic foreground compositions?
Answer: The minimum focal distance is 0.2 m, which allows you to place close foreground subjects in strong relation to wide backgrounds for striking compositions.

Question: Will I get starbursts at wider apertures?
Answer: Yes. Thanks to the ten straight aperture blades and the optical design, the lens can produce clear starbursts from f/4 to f/22 without glare in the starburst.

Question: How does the lens handle flare and chromatic aberration?
Answer: The lens uses anti-reflection film technology to improve light transmittance and reduce flare. Its optical construction, including one double-sided aspherical element and two extra-low dispersion elements, minimizes chromatic aberration and distortion.