Then we went to a hall where presses are used in the production process. We found out that most of the space is taken by working stations for designing and producing dies. Most dies Sigma produce on their own. It makes the production quicker and allows you to make minor alterations on the spot. To be honest I wasn't aware how many dies are needed to produce particular parts of lenses.
Dies were stocked in many places and their number I found mind-boggling.
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There are a lot of presses themselves and they process both metal and plastic parts made of granular polycarbonate which, after heating and melting, is pumped under the press.
In that hall different caps, hoods and lightweight tubes are produced.
Presses not only cut out desired shapes but they are able to bend them at the same time.
Brass and aluminum tapes are the basis – from them are cut aperture blades, among other things.
