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Key Features
- For Sigma I Series Lenses
- Fit Lenses with 55mm Filter Size
- Magnetic Attachment
- Felt Backing Prevents Scratches
Dedicated to Sigma's I Series lenses, this LCF5501M Magnetic Metal Lens Cap protects the front of lenses when not in use. This magnetic cap is only compatible with select I Series lenses featuring a 55mm filter diameter and is intended for use when the lens hood is not attached. The metal cap has a felt backing to prevent scratching and a raised front edge enables a firm grip for easy removal.
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