Hang on I've just checked, the DMK 21AF04.AS up to 1 hour exposure,
the DBK 21F04 up to 30sec, unfortunately the DFK 21F04 have exposures only up to 1/30 sec
To get the full 60 min exposure you have to go for the .AS models
http://www.astronomycameras.com/en/products/
A couple more DMK DSOs
http://www.iceinspace.com.au/forum/s...&highlight=DMK
http://www.iceinspace.com.au/forum/s...&highlight=DMK