Thanks Mark that worked perfectly! I followed your steps and took a 60 second sub. Once the exposure was over it was instantly available in the preview screen and the camera did not take an equal duration dark frame. Now my question is: what is that setting doing? Meaning what is the 0.3ev? Also, I saw a lot of talk about using a wired remote shutter button. I've tried those, in fact I have the NEEWER but, if that's not convenient for you I use the Sony Remote Camera Control (free from Sony) along with a small program called PHDMax which is also freeware available at www.felopaul.com to take a user selected number of subs in bulb mode for a defined duration of your choosing. It's main purpose is to provide dithering through PHD. Essentially it's a software intervalometer and dithering tool. Just connect the camera via USB and program it to take as many subs as you like. Think of it as a super striped down version of BackyardEOS for Sony cameras. Considering how limited the SDK developer tools are for Sony cameras it's a pretty amazing little piece of software. Frankie