Flex 4.8.13

[nevjam]

Hi, I'm using an Imacon 486 with Schneider shutter and lens on Linhof M679cs. The issue I have is that I don't seem to be able to access shutter speeds longer than about 1 second. Shorter than that is fine and with flash lighting there is no problem. It's as though the back is limited to a maximum time setting but I can't see a menu on the back in which to change it.

Any ideas?

Neville