NiSi 250mm f/5.6 Reflex
NiSi · 250 mm · f/5.6
Score Breakdown
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What We Like
+Distinctive donut-shaped bokeh and painterly double-line effect for unique artistic photography
+Exceptionally compact and lightweight for a 250mm telephoto lens
+Reduced chromatic aberration and vivid, warm color rendering
+Smooth 270-degree manual focus rotation with rotatable integrated lens hood
+Available in multiple camera mounts (Canon RF/EF, Sony E, Nikon Z/F, Hasselblad, Fujifilm G/X)
+Sturdy metal construction with weatherproof gasket; versatile 2-meter minimum focus distance
Worth Knowing
−Mirror lens bokeh is divisive—characteristic donut-shaped highlights and double-line effect don't suit all photography styles
−Fixed f/5.6 aperture cannot be stopped down; limits depth-of-field control
−Manual focus only with no autofocus or image stabilization; requires tripod or steady hands for sharp handheld shots
−Central sharpness is good but doesn't match modern prime lenses; specialized tool rather than general-purpose telephoto
General | |
|---|---|
About This LensThe NiSi 250mm f/5.6 Reflex is a mirror lens featuring unique donut-shaped bokeh and extraordinary painterly effects for artistic photography. Its compact size and lightweight construction (weighing around 400g) is especially impressive given its 250mm focal length. Mirror lenses are often criticized for lacking sharpness compared to traditional lenses, and the NiSi is no exception, though sharpness is sufficient for most purposes. The distinctive bokeh will divide opinions—some photographers may love this unique aesthetic, while others find it distracting or unnatural. | |
| Brand | NiSi |
| Release Year | 2024 |
Production Status ⓘCurrent status of lens manufacturing (e.g., in production, discontinued). |  In Production |
Lens Mount ⓘThe lens mount will tell you what type of lens range you can fit onto the camera body. Often the same camera company will have different lens ranges for different cameras. | Nikon Z |
System ⓘIndicates which camera system the lens is designed to attach to. | Nikon Z |
Maximum Format ⓘLargest sensor size compatible with the lens. |  Full Frame |
Physical | |
| Lens Weight | 400 g |
Lens Diameter ⓘWidth of the lens at its widest point | 68 mm |
Lens Length ⓘHow long the lens is from front to back. | 110 mm |
Front Filter Compatible ⓘSome lenses are compatible with front filters, some are compatible with back filters and some are compatible with both. Front filters are usually more convenient to add and remove. |  Yes |
Front Filter Size ⓘDiameter of attachable filters. | 62 mm |
Optics | |
Focal Range ⓘShortest to longest focal length of the lens (zoom range start - end ) | 250 mm |
Aperture Range ⓘLargest aperture at the lens's shortest focal length to longest focal length (aperture range start - end) | 5.6 |
| Focal Length Angle of View | 9.7° |
Diaphragm Type ⓘStructure and design of the aperture |  Fixed |
Zoom Lens ⓘZoom allows you to vary the focal length, change between long shots and close-ups | No |
| Autofocus Mode | No |
| Manual Mode |  Yes |
| Manual Focusing Ring |  Yes |
Features | |
Weather Sealing ⓘWeather sealing capabilities will give you more confidence when shooting in unfavourable conditions. |  Yes |
Fluorine Coating ⓘCoating to repel water and oil from lens elements. | No |
| Built In Lens Hood |  Yes |
| Lens Hood Type |  Round |
Teleconverter ⓘA teleconverter (extender) is an extra piece of equipment that fits between the lens and the camera body to enhance magnification | No |
| Image Stabilization | No |
Construction | |
Elements ⓘLens elements refer to individual pieces of glass within the lens. | 6 |
| Groups | 3 |
Aspherical Elements ⓘThe number of aspherical lens elements which can help correct aberrations such as spherical aberration. | 0 |
Bi Aspherical Elements ⓘElements with two non-spherical surfaces | 0 |
Super Low Dispersion ⓘAdvanced elements further reducing chromatic aberration | 0 |
CA Reduction ⓘBuilt-in features to reduce chromatic aberration | 0 |
Internal Focusing ⓘInternal Focusing means that the lens does not change in size during focusing, and the front element does not rotate. | No |