The FLI camera cools very quickly, and stays put at the desired point set in MaximDL. The filter wheel is reasonably quiet (more so than SBIG STF- and STT 8300-based cameras I've played with; they're nice but relatively noisy units). The downloads at 8 MHz are very fast (I was used to an STL-11K w/26 second downloads).
Our first-light target with the 3 nm Astrodon H-alpha filter was The Flame/Horsehead region, with the Moon at nearly first quarter phase. We used an A-P 105 mm f/5.9 Traveler with an A-P prime focus field flattener. Josh made a nicely machined adapter that connects the FLI CFW to the field flattener.
Here is the preliminary result with only ten 20 min light subs. The only calibration was a dark frame subtraction (i.e., no flat field correction was applied). The files were calibrated, registered, and stacked in PixInsight, then processed with a gentle pass through an Atrous Wavelet Transform (to remove some small-scale noise), then stretched with Histogram and Curves Transformations.
We were quite pleased that Alnitak was held extremely well in check (no significant halo), which suggests that the camera and 3 nm H-alpha filter did their jobs well.
We're collecting more lights and darks. I'm thinking of collecting at least thirty-six 20 min Ha subs to get more detail below the Horsehead. When the Moon is more cooperative, we'll also get RGB data, and merge it with a starless version of the H-alpha dataset.