What do the letters on Canon lenses mean?
I, II, III – Roman numerals in the lens name describe the lens’ generation. For example, there are two Canon 24-70mm f/2.8L lenses: the first one is the Canon EF 24-70mm f/2.8L USM, and the other one is Canon EF 24-70mm f/2.8L II USM.
What is EF-S and EF-M?
The EF-M lenses are designed for the new mirrorless camera system, and mount much closer to the sensor than the EF-S lenses (which are designed for DSLRs with a mirror box).
What do the letters on a lens mean?
Your camera lens may or may not have the “mm” printed on it. You will see a number, a slash, and another number (# / #). The second number is the focal length. A lens stamped 1.8 / 55 means that the focal length is a fixed 55mm. Prime lenses have only one focal length, while zoom lenses have a range of focal lengths.
What is RF and EF in Canon?
Email. RF mount is the new mount from Canon that is used on their lineup of full frame mirrorless cameras. EF mount is the older mount used by Canon in their Film SLR and Digital DSLR cameras (cameras with mirrors in them).
What does EF-S stand for Canon?
Electro-focus short back focus
EF-S stands for Electro-focus short back focus. This Canon lens mount was launched alongside the EOS 300D (EOS digital Rebel) camera in 2003. EF-S lenses have an image circle which just covers the sensor of APS-C cameras, meaning that the image circle is smaller in size than in EF lenses.
Does EF fit EF-M?
Yes, you CAN use an EF-M lens on an EF body (well, sort of)
What does F mean in lenses?
Aperture controls the brightness of the image that passes through the lens and falls on the image sensor. It is expressed as an f-number (written as “f/” followed by a number), such as f/1.4, f/2, f/2.8, /f4, f/5.6, f/8, f/11, f/16, f/22, or f/32.
How do you read a Canon lens?
The first number or pair of numbers indicates the range of available focal lengths in millimeters. From this you can tell what angles of view the particular lens can handle. Lower numbers mean a wider angle. So an ordinary, basic 18-55 DSLR lens can “zoom” from medium-wide views out to the beginning of telephoto range.
Is RF better than EF?
Paired with a Canon EOS R5 camera, I also found the RF lens to be markedly better at face and eye tracking than the EF. Those improvements do come at a cost, though. Unlike the EF version, the RF 24-70 is entirely focus by wire, meaning the focus ring has no mechanical control over the lens.
Is RF glass better than EF?
* Due to optical design, RF lenses tend to offer better image quality than EF lenses. Many EF lenses produce image quality that is virtually indistinguishable from their RF equivalent lens when on the R-system cameras… such as the 100mm f/2.8L Macro and Big White lenses like the 600mm etc.