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Key Features
- Magnetic Attachment
- Fits 55mm Thread Sizes
Designed for select Sigma lenses with 55mm thread diameters, this Magnetic Metal Lens Cap protects the front lens element.
More DetailsSee any errors on this page?
Can this magnetic cap be used with the Sigma 45 ...
Can this magnetic cap be used with the Sigma 45 2.8 lens? I believe it would fit, but since it's magnetic, I'm wondering if it might damage the 45 somehow.
The real answer is this cap works with the 45mm F2.8 DG, but not the 45mm F2.8 DG DN. If your lens says DN on it (also easily identifiable by the text on the face where the lens cap mounts; the updated DG version has no text there), then it is the older non compatible version.
Date published: 2026-01-26