Leica APO-Telyt-M 135 f/3.4 is listed for Leica M with Full frame coverage. Its verified front filter size is Ø49 mm. The supplied research links this exact mount variant to manufacturer evidence. Body-specific AF, crop and adapter behavior remain separate checks.
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Verified specifications
| Field | Value |
|---|---|
| Maker model code | 11889 |
| Mount | Leica M |
| Image format | Full frame |
| Front filter thread | Ø49 mm |
| Model ID | leica-apo-telyt-m-135-f-3-4-leica-m |
| Focal length | 135 mm |
| Maximum aperture | f/3.4 |
| Filter attachment type | screw_in |
| Weight | 15.9 oz (approx.; 450 g maker value) |
| Length | 4.12 in (approx.; 104.7 mm maker value) |
| Maximum barrel diameter | 58.5 mm |
| Closest focus | 4.92 ft (approx.; 1.5 m maker value) |
| Maximum magnification | 0.11111× |
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Compare the exact model code and rear mount in each listing. Amazon results may contain another mount or generation; the search is not a compatibility verdict.
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Search camera lenses on AmazonChoosing a camera
Look for the Leica M designation on the camera specification, then verify the exact model code and mount variant against its support page. The maker lists a 135 mm focal range and f/3.4 maximum aperture. A physical mount match is a starting point; still AF, movie AF, crop behavior, stabilization and firmware need separate checks.
Choosing a filter
A circular screw-in filter with a matching documented thread size is only a mechanical candidate. Magnetic filters, wide frames and stacked rings need separate system and vignetting checks. When no front thread is specified, do not buy a size from the focal length or barrel diameter.
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Official sources and scope
Checked for this reference on October 30, 2026. Product firmware and support lists can change; inspect the current maker page for your exact revision.