Sigma wants you to fix back-front focusing yourself.....

Brilliant idea. Instead of doing it right the first time, they can now save time/money/technicians, by making you, the buyer, fix the front and backfocusing yourself. All you have to do is to buy a tool from them

Here is the article. It starts by talking about their new Quality Controls. And at the end the tool that you can buy for yourself

http://fstoppers.com/sigma-reorganizes-lens-lineup-introduces-new-products-and-qc-measures

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