Hi stash,
thanks for help. but noise reduction was / is off. I guess Herrhausen is wright... no bulp at all . Si i do it with Yongnuo shutter control via 2,4 GHz... and gphoto2 pic download. it's abit old fashioned, but it works... next step is trying to cool the chip with a copper coldfinger and a peltier... may be some 15° under environment...
Matthias

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