[JJ_SO]

Today I got a reply from the local Sigma import company. Prices for mount conversions.

They range from 100.- / 250.- / 400.- Swiss francs. Some of the conversions can be done at the dealer's service workshop, others will have to go to Aizu.

I think, it's great news. Okay, I don't switch systems every day, but Sony does have interesting bodies these days. I own 8 lenses from Sigma and having their mounts converted actually will save me some loss which I would have if I try to sell them second hand. Currently I'm talking about 1/3 or 1/2 of the price I paid when it was new. And even if it's only a fixed MC11 adapter:

1. there's no MC-11 for Nikon > Sony
   
2. if I buy genuine Sony lenses one day, it would be such a fuss to change lenses and and adapters
   
3. One MC-11 costs 250.- francs - so most mount conversions won't be more expensive than this, plus the lenses get cleaned, tested and if necessary adjusted within the process.
   

To me, that makes Sigma lenses an investment, I welcome this decision away from "throw-away-and-get-something-new" mentality. I'm not free of it, but I prefer it that way.