UV, ND & Polarising:
Which Do You Need?

The Sigma Protector Filter is our top recommendation for photographers who want reliable lens protection without any compromise to image quality. Sigma's multi-coating dramatically reduces reflections and ghosting a common problem with cheaper UV filters that can actually degrade your images rather than protect them. The filter glass is optically neutral, meaning it adds no colour cast and no measurable sharpness reduction, even on high-resolution sensors.

What sets the Sigma Protector apart from budget alternatives is its slim profile and robust brass ring, which prevents jamming on the lens thread a frustratingly common issue with cheap filters. It is available in multiple thread sizes to fit the vast majority of Sigma, Canon, Nikon, Sony, and Fujifilm lenses sold at Carlos.gi. If you only buy one filter, make it this one.

Hoya is one of the most respected names in optical filter manufacturing, and the UV UX HMC is their entry-level offering that punches well above its price. The HMC (Hoya Multi-Coating) treatment reduces reflections and flare, while the ultra-slim aluminium frame minimises the risk of vignetting on wide-angle lenses a common problem with thicker, cheaper filter frames.

For photographers just starting out or those who want an affordable protector for a second or third lens, the Hoya UV UX HMC is the sensible choice. Image quality impact is minimal at normal shooting distances, and the filter is widely available in sizes to fit most kit lenses. It is not the filter we would recommend for a flagship lens for that, step up to the Sigma Protector but for everyday use it is excellent value.

The Sigma WR (Water Resistant) Circular Polarizer is our recommended CPL for photographers who shoot landscapes, seascapes, and travel. The WR coating repels water droplets and dust from the front element invaluable when shooting near waterfalls, at the coast, or in light rain. The multi-layer optical coating delivers excellent contrast and colour saturation without the greenish tint that plagues cheaper polarisers.

Rotating the filter is smooth and precise, with a satisfying resistance that makes it easy to dial in exactly the right amount of polarisation. Like all CPL filters, it reduces exposure by approximately 1.5 stops factor this into your exposure settings or let your camera's metering handle it automatically. The results it produces deep blue skies, eliminated glare on water, vivid foliage simply cannot be achieved in post-processing.

B+W is the gold standard in optical filters, manufactured in Germany using Schott glass the same glass used in high-end scientific optics. The F-Pro S03 E Circular Polarizer features a solid brass mount that threads smoothly and never jams, and MRC (Multi-Resistant Coating) that repels water, oil, and dust while minimising reflections to an absolute minimum. For photographers who own premium lenses Canon L-series, Nikon S-Line, Sony G Master this is the filter that matches the optical quality of the glass it protects.

The polarising effect is among the strongest available, with deep sky saturation and near-total elimination of surface reflections when rotated to the optimal angle. If you are serious about landscape, travel, or architectural photography and want a filter that will last decades, the B+W F-Pro S03 E is the definitive choice at Carlos.gi.