A useful adapter for using many screw thread manual lenses for 35mm SLR cameras on most Canon EOS film and digital SLR models

• Fits most Canon EOS SLRs
• Not for EOS-1D, EOS-1DS
• Accepts M42 screw lenses
• Infinity focus is maintained
• Auto or manual exposure
  on most camera models
• Manual diaphragm system

This simple adapter allows you to use hundreds of M42 screw fit manual focus lenses on most Canon EOS film and digital SLRs (but not the EOS-1 series). Infinity focusing is maintained (it may focus slightly beyond infinity with some lenses), and as there's no extra glass required the optical quality is not affected. M42 screw was a very popular lens fitting used by German and Japanese manufacturers such as Pentax, Praktica and many others in the 1960s and 1970s, and many of the lenses from these cameras can be given a new lease of life with this adapter. Please check the Compatibility section below, as some types of M42 lens with extra full aperture metering features are not suitable for use with adapters.

You can use manual focusing in aperture priority automatic or metered manual exposure modes on most suitable cameras (see the Compatibility section below), with stopped down metering. You set the aperture on the lens, and the camera sets the shutter speed automatically. Because of the smaller sensor in most digital cameras the effective focal lengths are increased by 60 per cent, so a 50mm lens provides the same field of view as an 80mm on a film camera.

It's simple to use - you can either fit the adapter to the lens first, then bayonet the combination onto the camera, or fit the adapter to the camera first and then attach/remove multiple lenses as required. The adapter locks securely onto the camera and is released using the button on the body, and lenses are attached normally using the screw thread. It adds under 1.4mm to the length of the lens when attached and weighs just 20g. This is a generic adapter and the make and style may vary slightly, but all are functionally identical.

An essential accessory for most Canon EOS film and digital users, with many M42 screw manual focus lenses!

Condition: Mint- (almost as new)
The adapter is in excellent condition and fully working order. It fits cameras and lenses smoothly, and locks securely onto the body. Cosmetically it shows only the usual signs of use with some surface marks here and there, but no dents, dings or deep scratches. At the time of listing we have more than one of this item, but the pictures and description here are representative of all of them.

Includes generic rear cap

Compatibility
This adapter fits most Canon EOS film and digital SLR cameras, plus the EF-M. Models with program modes only are not suitable for manual lenses or accessories, and the EOS 30 series (Elan 7 series) may give inaccurate exposures with manual lenses and accessories. Early cameras where the aperture display is adjustable with manual lenses should be set to f/1.0 (later models will display f/0.0 automatically). NOT suitable for EOS-1, EOS-1D or EOS-1DS cameras, which require a slightly different mount to work with manual lenses and accessories.

It accepts most M42 screw lenses, including those with manual, preset, semi-automatic, automatic or auto/manual diaphragms. A flange inside the mount depresses the auto diaphragm pin as it's screwed in, stopping the lens down to the selected aperture.

Please note that this adapter is NOT suitable for some M42 lenses with full aperture metering such as Pentax SMC (Super Multi Coated) Takumar for the Spotmatic F, ES and ESII, Mamiya Sekor SX for the MSX/DSX, EBC Fujinons for the Fujica ST/AZ, Voigtlander VSL TM, Olympus Zuiko for the FTL, Rikenon EE for the Ricoh TLS-EE, etc. The meter coupling levers foul on the adapter and the lens cannot be screwed fully home. Praktica Electric M42 lenses (with electrical contacts for full aperture metering) are usable, as long as they have a manual switch.