No. Compatibility is published as a list of lenses per converter, because the rear element of the lens has to clear the converter’s protruding optics. The reach it adds costs light, and that cost is arithmetic.
A teleconverter is an optical device between body and lens, and it is the one accessory in this group whose compatibility is a published list rather than a mount name.
Why the list exists
The converter’s own elements protrude towards the lens. A lens with a deeply recessed rear element accepts that intrusion; one with glass close to the mount does not. No mount designation predicts which, so makers publish the lenses their converter accepts.
What it adds and what it takes
Reach, by the stated factor — and light, by the same arithmetic. A 1.4× costs one stop, a 2× two. Thirteen products in this catalogue belong to the converter family, and the factor is the figure each of them prints.
What else changes
Autofocus performance, because the system now works with less light; and often the minimum focus distance, which the maker states per pairing where it states anything at all.
The other device it resembles and is not
An adapter, which is a spacer with no optics and exists to bridge two mounts. A converter multiplies the focal length; an adapter changes the flange distance. Confusing them is the usual reason a purchase surprises its buyer.
What people ask before they commit
How much light does a teleconverter cost?
A 1.4× converter costs one stop and a 2× costs two, because the same aperture diameter now serves a longer focal length. An f/2.8 lens becomes f/4 or f/5.6, and the camera meters the result — so the figure on the barrel is no longer the figure in use.
Why does the maker publish a compatibility list at all?
Because a teleconverter carries glass that protrudes into the lens mount, and a lens whose rear element sits far back physically cannot accept it. The list is mechanical before it is electronic, which is why a converter that fits one lens of a system may not fit its neighbour.
Last reviewed 12 September 2026