• Reasons behind the choices Cosina makes

Press-molding at 700ºC

2017.09.01

• Reasons behind the choices Cosina makes

Barrel polishing to a uniform size, weight, shape and grain

2017.08.01

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APO-LANTHARの誕生の歴史

2017.07.20

• Reasons behind the choices Cosina makes

Adamant about cutting glass blanks by hand

2017.07.14

• Reasons behind the choices Cosina makes

Careful inspection of glass materials

2017.07.03

• Reasons behind the choices Cosina makes

Optical glass, the source of high picture quality

2017.06.15

• Reasons behind the choices Cosina makes

Visual inspections of all elements

2017.06.01

• Reasons behind the choices Cosina makes

Tools we stock and the efforts we make with them

2017.05.15

• Reasons behind the choices Cosina makes

How to cut straight edges in a round element

2017.04.17

• Reasons behind the choices Cosina makes

Flattening optical element’s surface manually

2017.04.03

• Reasons behind the choices Cosina makes

Cleaning optical elements according to their inherent material properties

2017.03.01

• Reasons behind the choices Cosina makes

A make-or-break attitude in every batch of lenses we make

2017.02.15