Have you ever wondered how camera lenses are manufactured? Why it takes days to make a new lens? Well, here’s an interesting look into how lenses for DSLR cameras are made. It takes a total of six weeks to make one optical lens. Camera lenses go through several inspections to make sure that the glass gets to the final stage without defects or any dust particles on it.
Here’s a video that demonstrates how camera lenses are made -
There are four main manufacturing processes.
- Grinding and Polishing lens elements
- Coating lenses
- Producing the barrel
- Assembling the lens
The videos show a step-by-step procedure on how a Canon 500mm lens is made. These videos were taken in Canon’s lens manufacturing factory in Japan.
In the above video, you can see that the manufacturing of the lens goes through a series of steps. Here are the lens manufacturing steps as shown in the above videos:
- Material blending
- Melted glass is allowed to cool naturally
- Cutting the glass into pieces
- Shape the glass into sheets
- Shaping and pressing process
- Grinning processes
- Heating the glass and form its shape by pressing (by hands or by automatic machines)
- Further polishing
- Rough grinding that produces that curved surface of the lens
- Fine grinding
- Polishing and surface curvature adjustment
- Optical inspection
- Clean with ultrasonic washing machines
- The lens assembly process itself (done by hand for Canon L lenses)
Hat tip to Digital Photography Writer for sharing this.