Editing Lens mount (section)

==Secondary lens mount==
[[Image:Teleconverter with Camera and lens.swn.jpg|thumb|A teleconverter attached between a camera and its objective]]
[[Secondary lens]] refers to a multi-element lens mounted either in front of a camera's primary lens, or in between the camera body and the primary lens.

(D)SLR camera & interchangeable-lens manufacturers offer lens accessories like [[extension tube]]s and secondary lenses like [[teleconverter]]s, which mount in between the camera body and the primary lens, both using and providing a primary lens mount. Various lensmakers also offer optical accessories that mount in front of the lens; these may include [[wide-angle lens|wide-angle]], [[telephoto]], [[fisheye lens|fisheye]], and [[close-up]] or [[macro photography|macro]] adapters.

[[Canon PowerShot A]] and [[Canon PowerShot G]] cameras have a built-in or non-interchangeable primary (zoom) lens, and Canon has "conversion tube" accessories available for some [[Canon PowerShot]] camera models which provide either a 52mm or 58mm "accessory/filter" screw thread.  Canon's close-up, wide- (WC-DC), and tele-conversion (TC-DC) lenses have 2, 3, and 4-element lenses respectively, so they are multi-element lenses and not diopter "filters".