What filter diameter does my lens need?
The filter diameter is the number accompanying the ø symbol on the front of the lens or on the inside of its cap: ø67 means a 67 mm filter. It does not depend on the focal length; a 50 mm lens usually takes 49 to 58 mm filters.
Camaralia's free tool searches for it for you among 574 photo, video, and cinema lenses, and tells you which ND, polarizer, and UV filters are suitable and what step-up ring you need if you want to share filters between lenses.
How does the filter diameter search tool work?
The Camaralia tool has a database of 574 photo, video, and cinema lenses from the catalog, including rental lenses, with their filter diameter and link to their product page. The data comes from each manufacturer's technical specifications. There are two ways to use it:
- Search for your lens. Type the model and, if you want to narrow it down, filter by mount: Sony E, Canon RF, Canon EF / EF-S, Nikon Z, Nikon F, Fujifilm X, GFX, L-Mount, Micro 4/3, or Cinema.
- Choose your diameter. If you already know the ø of your lens, select it: 37, 39, 40.5, 43, 46, 49, 52, 55, 58, 62, 67, 72, 77, 82, 86, 95, 105, or 112 mm.
You can add several lenses at once. This way, the tool tells you which filters they share and what step-up ring you need to use the same filters on all of them.
If your lens is another version (I, II, III…), check the ø engraved on the lens itself.
How to find the filter diameter without a tool?
There are three ways to find out without searching for the model:
- Look at the front. Almost all lenses have the ø symbol followed by a number engraved on the front ring or next to the thread. ø67 means a 67 mm filter.
- Check the cap. Many caps have the same number printed on the inside. If the cap is original, it is a quick way to check.
- Measure the thread. If there is no marking, measure the inner diameter of the thread from edge to edge and choose the closest standard size: 49, 52, 55, 58, 62, 67, 72, 77, 82…
Do not confuse the diameter with the focal length. A 50 mm lens usually takes 49 to 58 mm filters.
What about lenses without threads, with rear filters, or cinema lenses?
Not all lenses accept a threaded filter in front. The tool marks each case in the table:
- No thread: the lens does not have a front thread. Examples: Sony FE 12-24mm F4 G and Canon TS-E 17mm F4 L.
- Rear filter: the filter is placed on the back of the lens. Examples: Sony FE 14mm F1.8 GM and Canon RF 14mm F1.4 L VCM.
- Drop-in: the filter is a cartridge that is inserted into the body of the telephoto lens. Examples: Sony FE 300mm F2.8 GM OSS (ø 40.5 mm), Canon RF 400mm F2.8 L IS USM (ø 52 mm), and Nikon NIKKOR Z 800mm f/6.3 VR S (ø 46 mm).
- Does not accept filters: for example, the Sigma ART 15mm F1.4 DG DN Fisheye.
- Cinema lenses: in addition to the thread diameter, the front diameter is indicated. The Canon CN-E 14-35mm T1.7 Flex Zoom has ø 105 mm and a 114 mm front; the Sigma 18-35mm T2 has ø 82 mm and a 95 mm front.
If your lens is a cinema lens or does not accept threads, check filter holders and adapter rings and matte boxes.
Can I use the same filter on several lenses?
Yes. With step-up adapter rings (from smaller to larger diameter), you can mount a large filter on lenses with smaller threads. The practical rule is to buy the filter for the lens with the largest diameter and adapt it down with rings.
How to do it with the search tool:
- Add all your lenses to the list.
- Look at the largest thread diameter: that is the one that determines the filter size.
- For the rest, use a step-up ring from its thread to that size.
Keep in mind that with wide-angle lenses, a filter mounted with a ring can cause vignetting in the corners. If you use extreme wide-angles, it is preferable to use a filter of the exact diameter or a slim profile one.
What other tools does Camaralia offer?
In addition to the filter diameter search tool, you can use:
- Video memory card calculator: GB per hour and card class (V30, V60, V90) according to your format.
- What camera do you need?: 7-question advisor that recommends a camera and completes the kit.
They are all on the tools page. More will be coming soon.
Search for your lens diameter now
Choose your brand, your mount, and your lens, and get the filter diameter in seconds: Filter diameter search by lens.
Once you have it, check the filters for lenses available in the store.