NiSi ND and Lee ProGlass IRND are both neutral density filters made for long exposures. The IR in the Lee name points to infrared control, which matters most with very dark filters, while NiSi offers a broad range of its own for landscape and video users.
Why Infrared Control Matters
Camera sensors can see some infrared light that our eyes do not. A very dense ND filter may block visible light well yet pass some infrared, which can add a warm or magenta cast and soften dark areas such as foliage. Filters described as IR neutral density are designed to limit that effect.
- With a light ND of 1 to 3 stops, the effect is rarely noticeable.
- With a dense ND of 10 stops or more, the cast is more likely to appear.
- Raw files let you correct white balance, but heavy shifts can still leave odd tones.
Comparing the Two Lines
| Area | NiSi ND | Lee ProGlass IRND |
|---|---|---|
| Main purpose | Long exposure and video ND | Long exposure with IR control |
| System fit | NiSi holders and round filters | Lee holder ecosystem and round options |
| Best known for | Wide range of formats | A long-established filter system |
Both makers have multiple series, so look at the exact product name. Holder size, filter dimensions and coatings should be checked on each maker’s page, since a holder from one brand often does not accept filters from another without an adapter.
How to Choose Step by Step
- Decide on square or round. Square suits users who also carry graduated filters, and round suits light travel kits.
- Match the holder to your widest lens, because a small holder can show the edges on ultra wide angles.
- Pick densities by subject: lighter for waterfalls in shade, stronger for seascapes and city scenes at midday.
- Check how the maker handles color neutrality at high density, and note whether the maker lists a recommended white balance.
Practical Long Exposure Workflow
Set the camera on a tripod and turn off lens stabilization. Focus before attaching the filter. Take a test frame without the filter, note the exposure, then add the stops of your ND. For example, a base exposure of 1/60 with a 10-stop filter becomes about 16 seconds. Treat these numbers as rough guides and adjust after checking the histogram.
FAQ
Is infrared control necessary for every shot?
No. For light to moderate ND it is a small factor. It becomes a bigger consideration for strong filters, especially when you shoot scenes with a lot of green foliage.
Can I mix brands?
Only when the filter size and holder fit together. Round filters cross brands easily if the thread matches. Square filters need the right holder width and slot depth.
The Short Version
Choose Lee ProGlass IRND if infrared control and an established holder system matter most to you. Choose NiSi ND if its format range and system suit your lenses and travel style. Always confirm sizes and specs with the makers.
