
Hoya
Hoya ALP49CRPL 49mm Alpha Circular Polarizer Filter
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*
Check availability
*Price sourced from Amazon.com. Last updated:Aug 30, 2026.Price and availability are subject to change — details.
Affiliate Disclosure: As an Amazon Associate, Studio Supplies earns from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.
Notice a mistake? Let Us Know
Overview
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
Frequently Asked Questions
Will this filter interfere with autofocus on my camera?
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.
The filter is listed as non-coated — does that affect flare resistance or image quality?
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.
How much light does this filter absorb, and do I need to adjust exposure?
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.
How do I get the strongest polarization effect when shooting?
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.
Is the 49mm size appropriate for common mirrorless and DSLR kit lenses?
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.