CAMERA LENS

INSPECTION METHOD

TO DETECT LENS FUNGUS, HAZE AND SCRATCHES

OF USED CAMERA LENSES

ALL SELLERS OF USED LENSES SHOULD USE THIS METHOD TO PREVENT QUALITY DISPUTES AFTERWARDS

AND OF COURSE TO ALSO MAINTAIN THEIR REPUTATION

The method used here is a halogene lamp of 20 Watts lighting through the lens from behind.

One observes the front lens from an angle. Haze, Fungus and dust become clearly visible that otherwise would be invisible in a simple opaque back lit observation.

GRADING LENSES WITHOUT USING THIS METHOD ARE NILL AND VOID

HUNDREDS OF FIRST SIGHT SATISFIED CUSTOMERS ENDED UP INFECTING ALL THEIR GOOD EQUIPMENT

BECAUSE OF SELLER’s CARELESS GRADING METHODS

FUNGUS GREW FURTHER COMPROMISING SHARPNESS ON PRINTS

HAZE DETERIORATING CONTRAST RESULTING IN DEPLORABLE PRINT RESULTS

SUCH LENSES ARE OPTICALLY DEFUNCT IN LESS THAN A YEAR AFTER PURCHASE

*** EXAMPLE HERE IS AN INFECTED MAMIYA RZ 140mm MACRO LENS ***

Lens Grade: “poor” due to fungus & haze

http://www.observatoryscope.com/ebay/Lens_Grading_Scales.html

In the original sale this lens was rated EXC++ : WRONG!

image below :fungus

image below : scratch and pit marked as reference

image below : 4 scratches and a pit

image below : 4 scratches and a pit (all severe)

the scratches showing as light lines indicate light breaking due to continuity interruption in the glass (splitting)

this splitting means the scratch may grow over time

image below : fungus

image below : scratches and dust

image below : haze visible from an angle

image below : ‘no problem’ dust

image below : problematic haze

Image below is taken at the front of the lens with a flash lit white carton behind the lens. The image focus was at scratch distance.

Scratches obstructing light indicate severe deep scratches. The yellow mark points at a pit. The red mark points at a scratch.