© Camera Check Point, Dubbo  Australia - … photographic repair services since 1981
Camera Check Point closes in June 2018 after 37 years of operation.
These pages are for information only and will remain available for a short period of time.

Home of Camera Check Point
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Service and repair of lenses …

Here’s a little background and information about lenses, how they operate, what can go wrong, and how to care for them.

Typical modern lens with circuitry and cams.Zoom lenses operate by moving internal and external lens groups back and forth, either by a turning or by a back-forth sliding action.

For the lens to focus at all focal lengths a number of cam barrels and rollers are used to position the elements within the lens.
These are precision made parts, that, if damaged or distorted by impact, the smooth function of the zoom and the critical positioning of the optics, will be compromised.

Modern lenses contain circuitry, connectors, contacts and switches which communicate with the camera.
The constant flow of information tells the camera where the zoom is positioned, how far the aperture should be closed and which direction the focusing drive should turn the lens to set correct focus. The circuitry does NOT like water, especially salt-water, which will quickly destroy it.

Ultra sonic silent wave focus drive unitModern auto-focus lenses use a smart device, known either as an Ultrasonic or a Silent Wave motor which silently and instantly adjusts the focus.
Older or lower cost lenses use regular micro motors to drive and adjust focus, and are usually a little slower in operation.Auto-focus lenses have many internal parts and circuitry.

As you can appreciate impact (yes, gravity can be a pest), intrusion of sand grains or liquids can cause serious damage your lens, while dust contamination mainly affects contrast.

Impact damaged zoom lenses may be repairable, but a repair to be economical, some kind of compromise often has to be accepted. This may be in the form of slower focus or tightness when zooming, but saves you having to buy a new lens.

Very fine and accurate multi-threaded focusing helicoid.Good quality manual lenses feature extra fine, and multiple helical threads, which mesh accurately and provide fine, smooth focus.

Many old lenses give superior or interesting images when used with an adapter on a digital cameras, and can be well worth restoring.

Common service needs with older lenses are: aged lubricants causing tight, loose or jerky focusing and sticking diaphragm blades due to oils. All these problems can be fully remedied to restore the lens.

Fungus and atmospheric fogging can be somewhat more problematic. Fungus growth is generally more of a problem in humid and coastal areas. If you discover fungus spots within the lens, early cleaning attention is essential if you want to save the lens and prevent coating damage.

Business Closure

The time has come to retire and we wish to advise that Camera Check Point will cease operation June 2018.

After 37 years of operation and servicing over 30.000  pieces of photo equipment (cameras, lenses, projectors and more), we plan to take it a little easier, and new work can no longer be accepted.

Unfortunately there are few technicians left in Australia with the knowledge and experience required to ‘put snap’ back into mechanical cameras and lenses.

For this reason I am planning on making available my vast library of service information, notes and know-how.

The project will take time and will not happen immediately, but, if you are interested in getting your hands on the material, just drop me an email to register your name.

Many thanks,
Ben Vang