Circular Polarizer Filter Sizes: 46mm, 67mm and 77mm Explained
By The Camera Exchange | Published: 2026-11-03
Category: Buying Guides
Match the CPL to your lens's filter thread, not to the filter you used last time. Here's how 46mm, 67mm and 77mm polarizers differ in fit, cost and step-up flexibility.
Quick answer
Buy the circular polarizer that matches the filter thread printed on your lens barrel, and if you shoot several lenses, size the filter for your largest thread and use step-up rings on the rest. A 46mm polarizer suits compact and mirrorless lenses, 67mm covers many standard zooms, and 77mm fits most large-aperture and pro zooms.
Why the thread size decides everything
A circular polarizer screws into the front thread of your lens, so the diameter must match exactly. The number is usually printed near the front element with a diameter symbol, for example 67mm. Check every lens you plan to polarize before ordering.
A filter that is too small will not mount at all, and one that is too large will not grip the threads. There is no adapter built into the filter, so the size choice is a fit decision first and a budget decision second.
The trade-off between one filter and several
Buying a polarizer for each lens thread is the simplest workflow, but it multiplies cost and means carrying several filters. Buying one large polarizer and stepping up smaller lenses is cheaper overall, but step-up rings add a small stack and can make a lens hood fit poorly.
If you mostly shoot one lens, match that lens exactly. If you switch between a 46mm walkaround lens and a 77mm zoom, the large filter plus a step-up ring is usually the more practical kit.
When a smaller filter still makes sense
Compact and rangefinder-style lenses often use 46mm threads, and a small polarizer keeps the setup light and inconspicuous. The same applies to some kit zooms with 52mm or 58mm threads, though those sizes are outside this guide's three examples.
The exception is a lens with a rotating front element during focus. A polarizer still works, but you may need to re-adjust the filter after focusing, so check the lens behavior before relying on it for fast work.
Decision rules for choosing a CPL size
- One lens only: Read the thread diameter on the lens barrel and buy that exact size. Do not size up unless you plan to add step-up rings later.
- Two or more lenses with different threads: Buy the polarizer for your largest thread, then add step-up rings for the smaller lenses. This keeps one filter covering the kit. Check that each step-up ring matches both the lens thread and the filter thread.
- Frequent hood use: Prefer a filter that matches the lens thread directly. A step-up ring can push the filter forward and interfere with bayonet hoods.
- Budget priority: Smaller threads usually cost less. The 46mm Hoya NXT Plus is the lowest-priced example here, while the 77mm ProMaster HGX Prime is the highest.
- Brand choice between ProMaster and Hoya: Both brands appear in this catalog at different sizes, so compare the exact size and price you need rather than assuming one brand is always cheaper.
Product facts to compare
- ProMaster 67mm Circular Polarizer Filter (CPL) – Pure Light: ProMaster 67mm Circular Polarizer Filter (CPL) – Pure Light, catalog price USD 56.97 (comparison price USD 94.95). A mid-priced 67mm option for standard zooms, with a meaningful saving against the listed comparison price.
ProMaster 67mm Circular Polarizer Filter (CPL) – Pure Light - ProMaster 77mm Circular Polarizer Filter – HGX Prime: ProMaster 77mm Circular Polarizer Filter – HGX Prime, catalog price USD 124.17 (comparison price USD 179.95). The 77mm size suits large-aperture and pro zooms, and the HGX Prime line is the higher-priced ProMaster option here.
ProMaster 77mm Circular Polarizer Filter – HGX Prime - Hoya NXT Plus Circular Polarizer 46mm: Hoya NXT Plus Circular Polarizer 46mm, catalog price USD 36.71 (comparison price USD 48.95). A low-cost 46mm polarizer for compact and mirrorless lenses, and the smallest of the three sizes in this guide.
Who should buy which size
Best for
- Photographers with a single lens who want an exact-thread polarizer
- Travel and walkaround shooters using compact or mirrorless lenses with 46mm threads
- Zoom users who want one 77mm polarizer plus step-up rings for smaller lenses
Not for
- Shooters who need a filter for a thread size not listed here, such as 52mm or 82mm
- Anyone who expects one filter to screw directly onto lenses with different thread diameters without adapters
