I am using the Astrophotography Tool software to control a STF8300M CCD. When taking exposures, APT's interface offers a range from 0.4s to Bulb. Bulb allows you to enter your own value, and since I would like to take a frame faster than 0.4s long, I enter in a number less than 0.4s, only to have the program correct it to 0.4s when I hit enter.
The STF8300M has a min exposure time of 0.09s. When using CCDOPS I can take a 0.09s exposure with no problem. Does APT have a database in which it reads 0.4s as the min time? Is there a way to alter this setting so that I can take shorter exposures?