Square Filters

You can use one square filter across all your lenses, regardless of their size.

Square filter systems are made up of a square filter, a filter holder and a filter adapter that attaches a filter holder to different lens sizes. Instead of buying multiple filters for each lens, you can invest in a higher quality neutral density or polarizing filter because you can use it with any lens.

Anyone with a broad collection of lenses, landscape photographers and those who value quality over a minimalist camera bag.

If you use a broad range of lenses, square filters can be much cheaper than circular filters as you can use one set of filters across all your lenses — provided you have the right filter adapters to connect your filter holder to different sized lenses. 

Square filters are also popular with landscape photographers because they offer more versatility. For example, you can adjust the height of a graduated ND filter in the filter holder to better suit the lighting conditions. Square filters are bulkier and slower to set up, so circular filters are recommended for those who prefer a light kit and moving quickly.

No, Urth Square Filters have great colour neutrality.

If you do experience a slight colour cast when using an ND filter, you may need to manually adjust white balance settings as restricting the light entering your camera can throw off your white balance.

There are three elements to a square filter system: the filter itself, the filter holder and the filter adapter that connects to your lens.

You can use a square filter with different sized lenses if you purchase the appropriate filter adapter, allowing you to connect the filter holder to your lens. When you’re ready to shoot, just insert a filter into the holder. 

Filter holders also allow you to stack multiple filters so you can combine neutral density filters and polarizing filters.

We recommend you use our square filters with an Urth Square Filter Holder because they were meticulously designed to work with one another.

A square filter is a type of camera filter that comes in a square shape allowing photographers to use the same set of filters across lenses with different thread sizes with the help of a filter holder system.

The choice between round and square ND filters often depends on personal preference and the specific needs of the photographer. Square filters are more versatile, especially when using multiple filters simultaneously, while round filters are simpler and more convenient for basic use.