Can I use ND filters with the Canon EF 8-15mm f/4L Fisheye USM?

Question

I want to use neutral density filters with the Canon EF 8-15mm f/4L Fisheye USM. Are front filter systems like Formatt or Lee SW150 compatible with this lens, or will they vignette? If those systems do not work, what filter options are available for this fisheye lens?

user15871 · Accepted Answer

The EF 8-15mm f/4 L Fisheye lens has a gel filter holder in the rear of the lens. Gel, or other very thin media, can be cut to fit this holder. Gel ND filters are not as easy to find as they once were, but are still available from specialty companies such as B&H.

Here's a list of the Canon lenses with a 31mm rear gel filter holder:

EF 8-15mm f/4 L Fisheye Zoom USM
EF 11-24mm f/4 L USM
EF 14mm f/2.8 L USM
EF 14mm f/2.8 L II USM
EF 15mm f/2.8 Fisheye
EF 17-35mm f/2.8 L USM
EF 17-40mm f/4 L USM

Here's a rear view of the EF 17-40mm f/4 L. The rear of the 8-15mm f/4 L is similar.

There are also aftermarket adapters such as the Aurora PowerND CR Rear Mount Filter Kit for Canon EF Lens which fits the above listed lenses and allows use of Aurora rear filters. Here's a review of that system.

For some of the issues about using rear gel filters, please see this answer and the comments to Why would I use a rear gelatin filter over a front filter?

There's also this article: How to use a gel filter on Canon wide-angle lenses

Can I use ND filters with the Canon EF 8-15mm f/4L Fisheye USM?

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