NiSi Cine Drop-In Filter FS ND4

NiSi Cine Drop-In Filter FS ND4 – 2-stop ND for NiSi ATHENA full-frame prime lenses

The NiSi Cine Drop-In Filter FS ND4 reduces exposure by two stops, letting you use slower shutter speeds and wider apertures on NiSi ATHENA lenses. It fits directly into the lens drop-in slot and preserves color fidelity across the full spectrum, so you can capture cinematic motion blur and shallow depth of field without unwanted color shifts.

What this drop-in ND does

Use this FS ND4 filter to darken your image by exactly two stops. Consequently, you can slow shutter speeds to record motion blur, or open the aperture wider to isolate subjects with pleasing background blur. Because the filter maintains full-spectrum neutrality, it keeps colors true and consistent across your footage.

Optical quality and coating

The filter uses high-quality optical glass to deliver clear, detailed images. In addition, NiSi’s Optical Nano Coating technology enhances the surface to minimize reflections and preserve true-to-life tones. Therefore, each frame retains clarity and authentic color reproduction without the common color casts that some ND filters introduce.

Build and portability

The optical element is housed in a lightweight yet robust aluminum frame designed for field use. Moreover, the filter ships with a convenient carry case, so you can protect and transport it easily between shoots. The tight, precise fit into the Athena lenses’ drop-in slot ensures reliable placement and repeatable results when you swap filters on set.

Compatibility

This drop-in filter is compatible with NiSi ATHENA full-frame prime lenses that include a drop-in filter slot. Confirm your lens model has the drop-in slot before purchase to ensure proper fit and function.

Key features

• Designed for use with NiSi Athena full-frame prime lenses featuring a drop-in filter slot
• Darkens the overall image by 2 stop
• Enables slower shutter speed utilization
• Facilitates wider aperture settings
• Delivers full-spectrum neutrality for authentic, true-to-life outcomes
• Enhanced with NiSi Optical Nano Coating technology
• Crafted from high-quality optical glass
• Encased in a lightweight yet robust aluminum frame
• Comes with a convenient carry case for easy transportation

Practical use cases

Firstly, if you need to slow shutter speed to capture motion blur—such as flowing water or moving vehicles—this ND filter gives you two extra stops of exposure control without altering color balance. Secondly, if you want a shallower depth of field for portraits or cinematic close-ups, the FS ND4 lets you open the aperture wider while maintaining correct exposure. Finally, because it installs in the lens drop-in slot, you can keep working quickly on set with minimal handling.

FAQ

Question: Is this filter compatible with all NiSi ATHENA lenses?
Answer: It is compatible with NiSi ATHENA full-frame prime lenses that include a drop-in filter slot. Check your specific lens model to confirm it has the slot before purchasing.

Question: Will the ND filter change my color balance?
Answer: No. The FS ND4 is engineered for full-spectrum neutrality and uses NiSi Optical Nano Coating technology to preserve true-to-life colors and clarity, avoiding the color casts that some filters can create.

Question: How does the drop-in design help on set?
Answer: The drop-in form factor fits snugly into the Athena lens slot, allowing fast, repeatable filter changes without threading onto the front of the lens. This makes it easier to swap filters during shoots and reduces the risk of misalignment.

Question: What comes in the box?
Answer: The product includes the NiSi ATHENA FS ND Drop-In Filter housed in a lightweight aluminum frame and a convenient carry case for protection and transport.