
B+W
B+W 1100743 49mm Basic Circular Polarizer MRC Filter
★★★★★
Cut reflections off water and glass with confidence — the B+W 49mm Basic MRC CPL delivers clean polarization with flare-resistant multi-coating at a proven price point.
$50.30*$52.69Save 4%
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.
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Overview
Key Features
Black Knurled Filter Mount for Better Grip
MRC Coating to Control Flare & Ghosting
New QR Code included to Verify Authenticity
Good for down to 24mm Full Frame Format
ECO-Friendly Packaging
Specifications
Brand
B+W
Model
1100743
Filter Size
49mm
Filter Type
Circular Polarizer (CPL)
Coating
MRC (Multi-Resistant Coating)
Mount
Black Knurled Filter Ring
Minimum Full Frame Focal Length
24mm
Authenticity
QR Code Verification Included
Packaging
ECO-Friendly
Pros & Cons
👍 Pros
- MRC multi-coating effectively suppresses flare and ghosting on the filter's own glass surfaces, keeping backlit and sun-on-water scenes clean.
- Black knurled filter mount provides a secure, non-slip grip for rotating to the precise polarization angle — particularly useful with gloves or in cold conditions.
- Compatible with full-frame lenses 24mm and longer without vignetting, covering the majority of standard shooting focal lengths.
- CPL design maintains full compatibility with phase-detection and contrast-detect autofocus systems — no AF workarounds required.
- QR-based authenticity verification provides confidence you're receiving genuine B+W optical glass.
👎 Cons
- Like all CPLs, this filter causes a 1.5–2 stop light reduction, which forces slower shutter speeds or wider apertures in already low-light conditions — problematic for handheld shooting at dusk.
- The "Basic" designation in the product line means the filter ring is not ultra-slim; stacking a second filter or lens cap on top may be difficult, and vignetting risk on wide primes is higher than with a slim-profile ring.
- Polarization effect is most visible between approximately 30° and 60° from the light source — pointing directly at or away from the sun produces minimal effect, which requires deliberate shooting angle management.
- No protective case or pouch is included in the eco-friendly packaging, leaving the filter unprotected during transport without a separate solution.
Frequently Asked Questions
Will this filter affect my autofocus performance when mounted on a 49mm lens?
No — a circular polarizer (CPL) is specifically designed to maintain autofocus and metering compatibility, unlike linear polarizers. The circular polarization structure ensures the camera's phase-detection and contrast-detect AF systems read the light correctly. Mount it, rotate to your polarization angle, and shoot — AF operates normally throughout.
What does the MRC coating actually do for my images in the field?
MRC (Multi-Resistant Coating) applies multiple anti-reflection layers to the glass surfaces, which reduces lens flare and ghosting that appear when shooting into bright light sources — backlit scenes, sun-on-water, or direct window light. On a non-coated CPL, stray reflections from the filter glass itself can show up as artifacts in the frame. The MRC coating on this B+W filter substantially suppresses that effect.
The listing says "good for down to 24mm full frame" — what happens if I use it on a wider lens?
Below 24mm on full frame (or equivalent on crop sensors), vignetting becomes a real risk. The filter ring's physical edge starts to intrude into the image circle at ultra-wide angles, darkening the corners. On a 24mm or longer lens, you're safe; on a 16mm or 20mm, you'll likely see corner vignetting that requires cropping.
How much light does this filter absorb, and does that affect exposure?
A CPL typically causes a 1.5 to 2 stop light reduction depending on the rotation angle. At maximum polarization, expect closer to 2 stops of exposure loss — your camera's metering will compensate automatically in auto modes, but in manual mode you'll need to open up or slow the shutter accordingly. This is a universal CPL characteristic, not specific to this filter's glass quality.
How do I verify the filter is authentic?
B+W includes a QR code on the packaging that links to an authenticity verification page. Scan it before first use to confirm you've received a genuine B+W-manufactured filter rather than a counterfeit.