NiSi M75 Landscape CPL and Lens Cap: Holder Setup Basics
By NiSi Filters Australia | Published: 2026-11-01
Category: How-to Guides
Learn how to set up your NiSi M75 filter holder with the Landscape CPL and Protection Lens Cap, including installation order, rotation tips, and common mistakes to avoid.
Quick answer
Mount the NiSi NC Landscape CPL into your M75 filter holder before attaching the holder to your lens, then leave the CPL in place and use the M75 Protection Lens Cap to cover it when not shooting. This keeps your polarizer protected and ready for the next shot.
Why the order of assembly matters
The M75 system is designed so the Landscape CPL sits inside the holder, behind the filter slots. If you try to insert the CPL after the holder is on the lens, you risk touching the glass or misaligning the thin frame. Installing the CPL first also lets you check that it seats flat before you add any other filters.
The Protection Lens Cap is made to stay on the holder when the CPL is mounted, so you do not need to remove the polarizer between shots. That saves time and reduces the chance of dropping or scratching the CPL.
When to remove the CPL (and when not to)
You can leave the Landscape CPL mounted permanently if you mostly shoot landscapes and want consistent polarization. However, if you need maximum light transmission for very dark scenes or want to avoid the slight warm tint some polarizers add, you may remove it. The M75 holder accepts the CPL with or without the 67mm adaptor ring, so removal is straightforward.
Note that the Protection Lens Cap is not compatible with the older M1 70mm system, so if you also own that system, keep the cap with your M75 kit only.
Step-by-step setup for M75 Landscape CPL and Lens Cap
- Insert the Landscape CPL into the holder: With the holder off the lens, align the CPL's thin frame with the holder's rear opening and press gently until it sits flush. Common mistake: forcing it at an angle, which can damage the frame or glass. Checkpoint: the CPL should rotate smoothly once seated. Test rotation before mounting the holder on your lens.
- Attach the holder to your lens: Screw the 67mm adaptor ring onto your lens, then bayonet the holder onto the ring. If you are not using the adaptor ring, attach the holder directly if your lens thread matches. Common mistake: cross-threading the adaptor ring. Checkpoint: the holder should lock securely with no wobble. Give the holder a gentle tug to confirm it is locked.
- Rotate the CPL to set polarization: Look through the viewfinder and turn the CPL's outer ring until you see the desired effect—typically maximum darkening of blue skies or removal of reflections. Common mistake: over-rotating and accidentally unscrewing the CPL from the holder. Checkpoint: the effect should change smoothly as you rotate. Mark the ideal rotation position with a small dot if you often return to the same spot.
- Fit the Protection Lens Cap: When not shooting, press the cap over the front of the holder. It will cover the CPL and protect it from dust and scratches. You can leave the CPL and adaptor ring in place. Common mistake: trying to force the cap onto an M1 70mm holder—it will not fit. Checkpoint: the cap should snap on securely and not fall off when you tilt the camera. Store the cap on the holder between shots to keep the CPL clean.
- Remove the CPL for cleaning or swapping: If you need to clean the CPL or use a different filter, first remove the holder from the lens, then gently push the CPL out from the rear. Common mistake: using excessive force or sharp tools. Checkpoint: after reinstallation, confirm the CPL is fully seated and rotates freely. Clean the CPL with a blower and lens tissue before reinstalling.
Product facts
- NiSi NC Landscape CPL For M75 Filter Holder: Replacement Landscape C-PL for NiSi M75 holder, thin frame, compatible with M75 Version 1 only. If you own an M75 Version 1 holder, this CPL is a direct replacement; for other versions, check compatibility before buying.
NiSi NC Landscape CPL For M75 Filter Holder - NiSi M75 Protection Lens Cap: Protects the built-in C-PL without removing it, works with or without the C-PL, and is not compatible with the M1 70mm System. You can keep your CPL mounted and protected, but do not try to use this cap on an M1 70mm holder.
NiSi M75 Protection Lens Cap
