Metal M39 / LTM Leica Screw Mount Rear Lens & Body Cap – Choose Option

M39
LTM
Leica Screw Mount
Rear Lens Cap
Body Cap
US Seller • Same-day shipping for orders placed before 2:00 PM Pacific, Monday–Friday (excluding holidays)

Precision-machined metal caps for the classic M39 / LTM (Leica Screw Mount). Order exactly what you need using the variation selector: Rear Lens Cap, Body Cap, or a Set (Rear + Body).

Key Features

  • Solid metal construction with knurled edges for secure grip.
  • Protects threads, optics, and camera internals from dust and impacts.
  • Fits standard 39 mm screw mounts (LTM rangefinder lenses/bodies; many M39 enlarger & early Zenit M39 lenses).
  • Low-profile design; clean black finish looks OEM on vintage kits.
  • Sold as Rear Cap, Body Cap, or Set for flexibility.

Condition

  • New / Unused — third-party, unbranded accessory.
  • Minor factory handling marks possible from bulk packaging.

Items Included

  • Rear lens cap (M39 screw) — choose this option for lenses.
  • Body cap (M39 screw) — choose this option for camera bodies.
  • Set — includes both rear lens cap and body cap.
  • Accessories not listed are not included. See photos for details.

At-a-Glance Specs

Mount / Thread M39 (Leica screw mount); compatible with LTM 39×26 tpi and most 39×1 M39 threads used on enlarger & early Zenit lenses/caps
Material Metal (black finish), knurled edge
Options Rear Lens Cap / Body Cap / Set
Compatibility Leica II/III series & copies (FED, Zorki, Canon LTM), many enlarger lenses, and early Zenit M39 SLR lenses

Not for Leica M bayonet or M42 mounts.

Compatibility Notes

  • LTM Rangefinders: Leica screw-mount bodies (II/III series), Canon LTM bodies, and Soviet FED/Zorki use M39 lenses.
  • Enlargers & Zenit M39: Many enlarger lenses and early Zenit SLRs use a 39 mm screw; caps typically fit since flange distance does not affect caps.
  • Check Your Gear: If your camera is Leica M bayonet or your lens is M42, these will not fit.

Shipping

  • Same-day shipping for orders received before 2:00 PM Pacific, Monday–Friday (excludes holidays).
  • Ships well-padded with tracking; combined shipping available on multiple items.

M39 / Leica Thread Mount – Compatibility Examples

Reference Guide

Examples only – if your lens uses a 39 mm screw thread (LTM), these rear caps will fit.

Rangefinder Camera Bodies Using M39 / LTM

Brand Camera bodies (examples) Notes
Leica
  • Leica I (Model C / “Standard”)
  • Leica II (Model D)
  • Leica III series (III / IIIa / IIIc)
  • Leica IIIf
  • Leica IIIg
 Classic Barnack screw-mount 35mm rangefinders using the 39 mm Leica Thread Mount.
Canon
  • Canon II / IIF
  • Canon IVSb (IV series)
  • Canon VT
  • Canon VI-L
  • Canon P & Canon 7
 1950s–60s Canon rangefinders that take Leica-thread lenses (L39 / M39 screw mount).
FED (USSR)
  • FED-1
  • FED-2
  • FED-3
  • FED-4
  • FED-5 / FED-5B
 Soviet Leica-style rangefinder bodies using 39 mm screw-mount lenses.
Zorki (USSR)
  • Zorki-1
  • Zorki-3 / 3M / 3C
  • Zorki-4 / 4K
  • Zorki-6
 Soviet Leica copies; all use the Leica Thread Mount and accept standard M39 lenses.
Japanese Leica-style copies
  • Leotax F (Leotax series)
  • Nicca 3-F / 3-S
  • Yashica YF
 High-quality Japanese rangefinders built around the same L39 screw mount standard.

Popular Lenses in M39 / LTM (Examples)

Lens brand Lens models (M39 / LTM versions) Typical use
Leica / Leitz
  • Elmar 50mm f/3.5 (collapsible)
  • Summitar 50mm f/2
  • Summicron 50mm f/2 (early LTM)
  • Elmar 90mm f/4
  • Hektor 135mm f/4.5 (M39 screw mount)
 Standard Leica screw-mount lenses for Barnack bodies; often adapted to modern cameras.
Canon / Serenar
  • Canon / Serenar 50mm f/1.8
  • Canon 35mm f/2.8
  • Canon 35mm f/2.0
  • Canon 85mm f/1.9
  • Canon 100mm f/3.5 & 135mm f/3.5
 Fast and compact LTM lenses, sold with Canon rangefinders but also used on Leica, FED, Zorki, etc.
Industar / Jupiter (USSR)
  • Industar-22 50mm f/3.5 (collapsible)
  • Industar-50 50mm f/3.5
  • Industar-26M 50mm f/2.8
  • Industar-61 / I-61 L/D 52–55mm f/2.8
  • Jupiter-8 50mm f/2
  • Jupiter-12 35mm f/2.8, Orion-15 28mm f/6
 Common Soviet screw-mount lenses supplied with FED & Zorki bodies; also usable on Leica / Canon.
Voigtländer (Cosina)
  • Color-Skopar 35mm f/2.5 (LTM)
  • Nokton 50mm f/1.5 (LTM)
  • Ultron 28mm f/1.9 (LTM)
  • 25mm f/4 Snapshot-Skopar (LTM)
 Modern high-performance screw-mount lenses, often used on Leica, Canon, and Bessa L/R bodies via LTM.

Note: This is not a complete list. Any lens marked “L39”, “M39”, “LTM” or “Leica Thread Mount” that screws into the camera will use this style of 39 mm rear lens cap.

Additional disclosures appear directly below this description.