Olympus Zuiko Auto-Macro 135mm f/4.5 - Olympus OM bellows Mount

The Zuiko Auto-Macro 135mm f/4.5 is a specialised lens designed exclusively for use with the Olympus OM Bellows or Telescopic Auto Tube. It lacks a built-in focusing helicoid, relying on the bellows for focus adjustment. This design allows for high-quality close-up photography with a generous working distance, making it ideal for photographing insects or other skittish subjects. It features an automatic diaphragm for ease of use when connected to the OM system via a cable. Inspect the lens for any signs of fungus or haze, which can be detrimental to macro performance. The aperture mechanism must be tested to ensure it communicates correctly with the bellows or extension tubes. SDS checks that the glass is clear and that the diaphragm blades are dry and move without hesitation when triggered.