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In order to prevent image errors like flaring and ghosting caused by the reflection of light, the outer rim around the clear glass parts of a lens need to be covered in black paint – a process done completely by hand, using a long tool called the ‘tip’. A high degree of precision and skill – and patience – is required for the painting process to succeed: a level of craftsmanship SIGMA is well and truly proud of.

photo : Mizuho Tamaru

SIGMA Aizu factory, Optical Element Processing No.2 Division, Painting and Grafting No.3 Division, Assistant Manager
Michie Ukawa

In the painting division, paint is applied to lenses of all possible sizes and shapes. Our workers make use of the specialized “tip” tool to apply the paint perfectly evenly. New innovations in lens manufacture mean new and ever more complicated lens designs. The perfect method to apply paint to each part of a product is determined through trial and error, a process we begin as early as the prototype stage. I think it is this kind of effort, together with ongoing research and progress, that supports SIGMA’s high level of quality and wins the trust of our customers worldwide. Me and my staff will continue giving our best in this skilled and highly technologized field of work.

A well-used painting tool. The paint is prepared with the brush and then applied around the lens with the tip (sponge part).

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