Breaking Boundaries: The Redefined Magnetic Filter System

Fit, Slim, Hypermagnetic & Vario

Years of Development, Perfected Through User Feedback

After years of rigorous testing, refinement, and extensive user feedback, we've created an unprecedented ultra-thin magnetic filter system that solves the critical flaws of existing market products. Oversized magnetic filters that easily fall off from impacts, incompatibility with original lens hoods—we've tackled these pain points with innovative thinking, achieving a breakthrough design featuring the market's thinnest 2mm single-filter frame.

Rigorously tested with the Canon 15-35mm ultra-wide-angle lens, even our CND three-function filter (dual-layer stack) delivers complete zero vignetting at 15mm, empowering you to capture every expansive vista without compromise.

Embedded Design for Perfect Integration

True Flush-Mount System

Unlike other magnetic filter systems that use adapter rings to increase size, STC MagVario's magnetic base ring embeds directly into the lens, achieving complete conformity with the lens diameter without requiring upsizing or adapter rings. This means:

✓ Direct Use of Original Lens Hoods — No sacrifices or compromises, maintain full original functionality
✓ Significantly Reduced Impact and Drop Risk — Flush-fit design with no protrusion, stable and secure
✓ Ultra-Thin, Maximum Light-Gathering Frame — Single filter adds only 2mm thickness; dual-layer stack equivalent to other brands' single layer
✓ Transform Traditional Screw-Mount Filters — Screw the magnetic base ring onto other threaded filters to enjoy the speed and safety of magnetic lens caps (not recommended for ultra-thin frame threaded filters with insufficient edge depth)

Our innovative design requires no additional tools for installing the magnetic base ring—simply use the filter front cap and leverage the super-strong magnetic force for incredibly simple installation.

Additional Premium Features

Ultra-low reflection coating UV protection filter effectively reduces flare for confident shooting toward the sun
Complete ring of maximum-strength magnets for secure attachment without slippage
Perfect lens-matched dimensions for effortless use and ultra-portable carrying
Differentiated side knurling patterns to aid tactile identification of different filters
Dedicated ultra-thin magnetic front + rear caps directly protect filter surfaces; carry outdoors without cases, pocket-store without scratching concerns
Every filter passes parallel light tube MTF resolution testing before shipment
Two complete front/rear cap sets allow one lens to use the magnetic lens cap while filters retain protective caps (magnetic base ring + front cap expansion packs coming soon)
All filter products and caps clearly marked with diameter to prevent mix-ups

Available Diameters

67mm | 77mm | 82mm | 95mm

Complete Package Contents

Each diameter set includes:

Ultra-low reflection UV protection filter + front & rear caps
CND (CPL+VND+VNDPL) three-function filter + front & rear caps
Same-diameter magnetic base ring × 1
STC professional filter protective soft case
- 180° full-opening zipper design
- Mesh pockets on both sides + elastic straps
- Fluorescent zipper for easy identification in low light
Base ring & cap removal carbon fiber tool
Warranty and instruction card

Important Disclaimers:

15mm Ultra-Wide-Angle Considerations: Ultra-wide-angle lenses at 15mm (full-frame) have light incident angles up to 110°. While installation and shooting without vignetting is possible, polarizing filters cannot achieve correct polarization across the entire field of view (excessive variation in light source angles), resulting in incomplete polarization effects. This is a lens characteristic, not a polarizing film abnormality or product defect, and cannot be grounds for return or exchange.

VND Reference Markings: The 10 ND level reference lines on the CND's rear filter are marked according to optical theory angles. However, due to polarizing film characteristics and laser marking precision at dense positions, minor variations in ND values may occur—this is not a product defect. Always use your camera's metering as the definitive reference.

VND Cross-Pattern Characteristics: First-time VND users must understand the physical cross-pattern characteristics of VNDs and their relationship to lens focal lengths. Cross-patterns cannot be grounds for return or exchange. (Click here for usable range reference by focal length)

Installation Limitations: After installing the dedicated magnetic base ring, you cannot use standard internal pinch lens caps or other threaded filters/adapters. To use other threaded adapter products, you must first remove the magnetic base ring. Our company accepts no liability for damage caused by forced installation without following this guideline.

Handling Care: The ultra-thin frame design requires careful handling. Damage from drops or impacts causing deformation is not covered under warranty. See detailed warranty terms below.

Please read all important notes below before purchasing

Important Notes:

When using polarizing function on 15mm lenses, certain lighting conditions and shooting angles may produce edge "light loss" in some areas (excessive angle of refraction causing light transmission reduction)—this differs from normal vignetting (physical light blocking) and is not a polarizer defect or abnormality
Some special 15mm lenses such as semi-fisheye or bulbous ultra-wide-angle designs are not compatible with this product
Ultra-low reflection coating layers slightly affect UV blocking effectiveness; generally insignificant for lenses with internal OCA adhesive protection. For special UV spectrum photography requirements, verify spectral specifications or consider using standard UV filters
Due to strong magnetic force, the recommended removal method is "sliding/prying" rather than "pulling." See instructional videos for details; call for clarification if needed
The magnetic base ring can be removed using either the included narrow-end carbon fiber tool or a standard ballpoint pen tip
The proprietary ultra-flush lens-matched design uses 6063 aerospace aluminum with moderate hardness. Handle with care to avoid drops and potential deformation
If the main body suffers impact damage causing deformation, magnetic force will "relatively weaken" due to "increased attachment distance"—this is normal physics
Excluding deformation-related relative weakening, normal conditions and living environments rarely cause demagnetization; no need to worry about service life. (Intentional demagnetization such as heating to Curie temperature or AC/DC demagnetization not covered under warranty)
Damage or deformation from user causes is not covered by warranty. This product line cannot be repaired, only replaced. Non-warranty situations qualify for discounted replacement purchase
When unboxing, you must record complete video. Without video documentation, returns found with product abnormalities will not be accepted for refund

Variable Neutral Density Filters

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Variable Neutral Density (VND) Filter

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MagVario magnetic filter - ultra-low reflection UV and CND sets