M42 lenses are not interchangeable with FD optics, as they have different flange bases. Screw M42 lens on the adapter. Put the red marks on outer and inner rings of the adapter with red mark on the lens collar together.
eBay
M42 (T2) - C/CS for M42 x 0.75 (T2) mount - C / CS Mount Adapter Ring M42-C M42-CS for Macro photography for Telescope
Aliexpress UK
■ Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other functions will. ■ 1x Ring Adapter. Not operate correctly while using this adapter. ■ The colors may be a little difference for the different monitor display.
eBay
SVBONY Adapter Ring M42 to Canon EF Port SLR Camera (T2-EOS)， M48 to Canon EF Port SLR Camera (M48-EOS)
Aliexpress UK
M42 LENS ADAPTER TO EOS MOUNT WITHOUT PLATE. Lens: M42 screw mount Lens eg. Pentacon, Takumar, Optomax, Zenit, Helios, Carl Zeis lens etc. 1x M42 adapter without plate to Canon EOS. Although the lens will fit physically, automatic diaphragm, auto-focusing, nor any other functions will not operate correctly while using this adapter.
eBay
Zhongyi Lens Turbo -FX II Adapter Reduce Focus for Canon EOS/M42/FD/NIK G lens to FUJIFILM X XPro2 XT3 S1 XT4 XT5 Lens Adapter
Aliexpress UK
All M42 Screw Mount Lenses. Notice: Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other functions will not operate correctly while using this adapter. It is possible to use Macro rings and other accessories.
eBay
T2-M42 for T2 (M42x0.75) mount lens - M42 (M42x1) mount camera Mount Adapter Ring T-M42 for telescope
Aliexpress UK
M42 LENS TO CANON EOS MOUNT ADAPTER. (as long as the body takes Canon EF lens). ALL Canon EOS DSLR. Notice: Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other functions will not operate correctly while using this adapter.
eBay
C Mount to M42 Screw Thread Lens Mount Adapter Inner 25.4mm Outer M42 C-M42
Aliexpress UK
- With this adapter, you can use M42 mount large format or enlarging Lens on EOS M mirrorless camera. - Instructions：M42 mount Large format or enlarging lenses with Focusing tube and this Modify lens adapter, use for Mirrorless Camera. - Modify lens purpose, Can not focus infinitely when used directly. - Material: aluminium. - Fine finishing! Install, remove and operate lens smoothly! - Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other functions will not operate correctly while using this adapter. Suitable For: - Lens: M42 mount large format and enlarging lenses.(Lens without focusing function) - Camera: Canon EOS M M2 M3 M5 M10 M100 M6 M50 mirrorless Camera. (This adapter doesn't fit Canon EF / EFs Mount Cameras, eg. 650D, Rebel T3i, 5D, 7D etc.).
eBay
M42 - L For M42 (M42x1) Mount Lens for L Mount Camera Adapter Ring M42-LT for Panasonica Lumix S1 S5 / Leica SL TL CL / Sigma FP
Aliexpress UK
M42 lenses are not interchangeable with FD optics, as they have different flange bases. Screw M42 lens on the adapter. Put the red marks on outer and inner rings of the adapter with red mark on the lens collar together.
eBay
M42-N1 For M42 (42x1) lens - Nikon 1 Mount Adapter Ring M42-Nikon 1 for Nikon 1 J1 J3 J5 V1 V3 S1 S2 etc.
Aliexpress UK
This lens mount adapter is a high-quality product that allows you to use M42 lenses on your Canon EOS-M camera. It is made by UKCE, a trusted brand for camera accessories. The adapter has a twist-on fastening mechanism and is compatible with M42/Universal lens fittings. It is suitable for Canon EOS-M cameras and comes with a one-month manufacturer warranty. With this adapter, you can transform your Canon EOS-M camera into a versatile tool for photography. It is a great addition for anyone who wants to expand their lens collection and experiment with different types of lenses. This adapter is perfect for photographers who want to capture stunning photographs with their Canon EOS-M camera without spending a lot of money on expensive lenses.
eBay
NIKON-M42 adapter ring for nikon AI AI-S F mount lens to m42 Screw mount Zeiss Pentax Mamiya camera AI-M42
Aliexpress UK