San Francisco-based Breakthrough Filters has announced an all-new EF to RF filter adapter. This is the first EF to RF drop-in filter adapter released not made by Canon.

Breakthrough's EF to RF Drop-In Filter Adapter is loaded with a variety of hardware improvements. The adapter has an all-metal aluminum alloy construction and includes dust and water resistance. The weather-sealed adapter has rubber gaskets around both the filter and rear mounts. The adapter includes a detachable tripod food and accepts mounting plates for ballheads, arca plates and more. Further, the interior has been blacked out to reduce specular reflections.

In terms of compatibility, Breakthrough states that you can mount your EF lenses to RF mounts on cameras such as the Canon EOS R, R5 and R6 cameras and the RED Komodo. The adapter supports autofocus, image stabilization and EXIF data recording.

The Breakthrough EF to RF Drop-In Filter Adapter includes numerous features, such as an all-metal construction, weather sealing and more. Click to enlarge. Image credit: Breakthrough

You can use either Canon's own drop-in filters or filters from Breakthrough. Breakthrough Photography announced many drop-in filters in August, you can learn more about them by reading our coverage.

The Breakthrough EF to RF Drop-In Filter Adapter is available for preorder for $199 USD. The first 500 orders will also ship with a free Breakthrough XF Clear drop-in filter. Shipping is expected to begin on November 16.

Breakthrough offers many drop-in filters for their new filter adapter and for the existing Canon EF-EOS R drop-in filter adapter. Image credit: Breakthrough

This is a sizable discount when compared to Canon's own EF-EOS R Drop-In Filter Mount Adapter. The version that comes with a circular polarizing filter costs $300 and the version that includes a drop-in variable ND filter is $400. If you already own a Canon Adapter and want to purchase Breakthrough's new EF to RF drop-in filter adapter, Breakthrough is offering a buyback program.

After your new filter arrives, you can use an included pre-paid return label to ship your Canon unit back for a refund on your transaction with Breakthrough. Sending a regular Canon EF to RF adapter nets you a $69 refund and Canon's Drop-In Filter Adapter is worth $149.

Breakthrough is offering a Canon Adapter Buyback program for purchasers of the new Breakthrough filter adapter. Click to enlarge. Image credit: Breakthrough

To learn more about the new Breakthrough EF to RF Drop-In Filter Adapter, head to Breakthrough's website.