I can only connect the "negative group and advise the purchase of the Scan -. Quality can not say anything because it does not extent came with my device in order to assess the können.Dia-scan on an SD card has not been possible. The Computer crashed each time during the subsequent reading of the SD card. Attempt with 2 cards! Conclusion: SD-Card no longer be used because malfunction !! This unit was totally scrap anyway. Maybe some devices are indeed fine, but such a bad product should not sell a brand company like Rollei.