NiSi UV Filter Fit Problems and Installation Issues Review

Data basis: I analyzed dozens of buyer reports and visual tests collected between Dec 2022 and Jan 2026. The dataset combined written reviews and video demonstrations, with most feedback from written reviews supported by a few short videos.

Top failures

Why does the filter not fit cleanly on my X100 series camera?

Regret moment: You try to thread the filter at first use and feel misalignment or resistance.

Severity: This issue is a primary complaint and commonly reported during initial installation.

Context: The problem appears at first use when removing the stock ring and re-threading the filter, and it worsens with repeated on/off handling.

Category contrast: Fit issues are more disruptive than expected for mid-range filters, because typical competitors screw on without removing camera parts.

Does this add steps or prevent using my lens cap?

• Early sign: The filter sits proud or mis-aligns with the factory lens cap on first try.
• Pattern: This is a secondary pattern seen across multiple buyer reports.
• When it shows: The interference shows up during daily handling and when you try to close the camera quickly.
• Why it matters: It adds extra time for each shoot and increases the chance of dropping or scratching the lens.
• Fix attempts: Buyers report needing to re-seat or slightly bend the cap, adding long-term hassle.

Will image quality suffer after I install this filter?

• Primary optical sign: Some users notice flare or reduced edge sharpness in bright backlight.
• Pattern: This is a secondary but persistent complaint across lighting tests.
• Usage anchor: The issue appears in strong directional light and during long outdoor sessions.
• Cause hint: Reflections from coatings and added glass surface create ghosting or contrast loss.
• Impact: Photos near bright lights look less clean, which is worse than expected for a UV protector in this price band.
• Workarounds tried: Users tried shading the lens and removing the filter for critical shots, which defeats the protection purpose.
• Fixability: Partial — the trade-off is between protection and occasionally worse image clarity.

Is the nano-coating durable and easy to clean?

• Early sign: Marks or streaks appear after routine cleaning for some buyers.
• Pattern: This is an edge-case but recurring with extended use.
• When it worsens: It becomes noticeable after repeated cleanings or rough outdoor use.
• Cause: The advertised waterproof coating can show micro-scratches if cleaned with abrasive cloths.
• Impact: Coating wear leads to more reflections and visible blemishes in photos.
• Attempts: Buyers used gentle cleaners and microfibre, but some still saw wear over months.
• Hidden requirement: The filter often requires gentle care and special cleaning to keep optical clarity.
• Category contrast: This feels worse than typical because many mid-range filters tolerate standard cleaning better.

Illustrative excerpts

Illustrative excerpt: "Filter cross-threaded and required force to seat cleanly." — reflects a primary pattern.

Illustrative excerpt: "Lens cap no longer snaps on without adjusting." — reflects a secondary pattern.

Illustrative excerpt: "Micro-scratches after gentle cleaning, more glare noticed." — reflects an edge-case pattern.

Who should avoid this

• Buyers wanting zero fuss: If you need a filter that installs instantly without removing parts, avoid this.
• Critical image purists: If you cannot tolerate occasional flare or edge softness, avoid this.
• High-frequency shooters: If you swap caps and filters often, avoid due to extra handling steps and fit risk.

Who this is actually good for

• Protection-first users: If you accept modest optical trade-offs for scratch and dust protection, this works.
• Casual photographers: If you shoot mostly in controlled light and value durable protection, small flare is tolerable.
• Collectors of matching gear: If matching a silver frame is important and you accept installation care, this fits aesthetically.

Expectation vs reality

• Expectation (reasonable for category): A UV filter should mount easily and protect the front element.
• Reality: This filter often requires removing the factory ring and careful threading, which is more work than typical mid-range options.
• Expectation: A coated filter should clean easily without optical change.
• Reality: Coating wear and cleaning marks can appear after repeated use, increasing glare.

Safer alternatives

• Tip 1: Choose a filter explicitly sold as a direct-fit for X100 mount or one with an adapter ring to avoid threading risks.
• Tip 2: Prefer filters that advertise non-protruding profiles if you need to keep the original lens cap functional.
• Tip 3: For critical image quality, test for flare in harsh light before committing to a protector filter.
• Tip 4: Use a microfibre and alcohol-free cleaner and avoid abrasives to protect nano-coatings.

The bottom line

Main regret trigger: Installation friction and fit inconsistency lead to the most returns and buyer frustration.

Why it’s worse: These problems are more disruptive than typical mid-range UV filters because they add steps and sometimes reduce image quality.

Verdict: Avoid this if you need plug-and-play fit or pristine optics; consider it only if you prioritize protection and matching aesthetics and accept extra care.