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Hoya ALP49CRPL 49mm Alpha Circular Polarizer Filter — main product image
Hoya ALP49CRPL 49mm Alpha Circular Polarizer Filter
Hoya ALP49CRPL 49mm Alpha Circular Polarizer Filter
Hoya ALP49CRPL 49mm Alpha Circular Polarizer Filter
Hoya

Hoya ALP49CRPL 49mm Alpha Circular Polarizer Filter

★★★★★4.5 (105 reviews)

Cut glare, deepen skies, and reveal color — the Hoya Alpha 49mm CPL delivers clean polarization at an entry price that makes it easy to keep one on every lens.

$17.23*
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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

The Hoya Alpha Circular Polarizer is a working photographer's entry point into optical polarization — the kind of filter you reach for when you need to kill the reflection bouncing off a lake surface, recover actual blue sky from a washed-out midday exposure, or bring foliage color back from the flat, overexposed look that plagues outdoor shooting in bright sun. What this filter does, it does straightforwardly: rotate the outer ring, watch the scene change in real time, and lock in the effect that post-processing simply cannot replicate. For landscape photographers, travel shooters, and anyone spending time outdoors with a camera, a CPL at this price removes any excuse for skipping the effect.

The precision-milled aluminum frame is a meaningful construction detail at this price tier — it threads cleanly and won't develop the play and wobble of cheaper plastic frames after a season of use. The glass itself is non-coated, which is the honest trade-off Hoya makes to hit the Alpha price point: you get accurate polarization performance in standard shooting conditions, but increased susceptibility to flare and internal reflections when light sources intrude from challenging angles. For photographers who primarily shoot in front-lit to cross-lit outdoor conditions, the optical output is solid. Those who regularly shoot into the light, near windows, or in high-contrast mixed lighting will want to step up to a multi-coated option. As a dedicated outdoor filter for landscape, architecture, or travel work, the Alpha 49mm earns its place in the filter wallet.

Key Features

Great optical quality at an affordable price.

Precision milled aluminum frame.

Cir-PL is non-coated glass

These new HOYA series plus the EVO filters are manufactured by HOYA exclusively for distribution in the United States of America.

Specifications

Brand
Hoya
Model Number
ALP49CRPL
Filter Type
Circular Polarizer (Cir-PL)
Filter Diameter
49mm
Frame Material
Precision milled aluminum
Glass Coating
Non-coated
Distribution Region
United States of America

Pros & Cons

👍 Pros

  • On a clear day, rotating this filter into position visibly deepens blue skies and punches up foliage saturation — the polarization effect is noticeable and photographically useful.
  • The precision-milled aluminum frame threads smoothly onto compatible lenses without the binding or cross-threading risk that affects cheaper plastic-framed filters.
  • At its price point, the Alpha makes it financially practical to own a CPL for each lens in your bag rather than swapping one filter between lenses mid-shoot.
  • Compatible with standard 49mm thread systems, so it works across brands and mounts without adapters.
  • Eliminates surface reflections from water and glass in a way that no post-processing technique can fully replicate — a genuine optical tool, not a fix-it-in-post workaround.

👎 Cons

  • Non-coated glass means flare resistance is limited — shooting toward bright light sources can introduce ghosting or reduce contrast in ways a multi-coated filter would handle better.
  • The non-coated surface attracts smudges and requires more frequent cleaning than coated alternatives, particularly noticeable during extended outdoor sessions.
  • No carrying case is included, so you'll need a separate pouch or filter wallet to protect it in your bag.
  • The filter adds measurable thickness to the lens front — on very wide angle lenses (below 24mm equivalent), vignetting at the frame corners is a real risk.
  • Rotation action on the outer polarizing ring can feel loose compared to premium-tier filters, making precise adjustments in the field slightly less controlled.

Frequently Asked Questions

Circular polarizers are specifically designed to maintain accurate autofocus and metering — the circular (as opposed to linear) design of this filter keeps your camera's phase-detection AF system working reliably. You can shoot with autofocus engaged as normal.
Non-coated glass is more susceptible to internal reflections and flare than multi-coated alternatives, particularly when shooting into bright light sources or near the sun. For front-lit outdoor work — landscapes, midday street, beach — the Alpha performs well. For backlit scenes or shooting near strong light sources, a multi-coated CPL will handle flare more gracefully.
Circular polarizers typically reduce light transmission by 1.5 to 2 stops. Your camera's TTL metering will compensate automatically, but be aware that shutter speed will drop — in lower light situations this can push you into motion blur territory on handheld shots.
Position yourself at roughly 90 degrees to the light source — the polarization effect is strongest at this angle relative to the sun. Rotate the outer ring of the filter while watching your scene through the viewfinder or live view until reflections minimize or sky color deepens to your preference.
49mm is a common filter thread size found on many compact primes and kit lenses — Sony E-mount 50mm f/1.8, Canon EF-M lenses, and various Micro Four Thirds primes frequently use this diameter. Check your specific lens cap or barrel for the engraved filter thread size before ordering.

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