This is from a recent shoot I did in Clarendon Arkansas. I love old truss bridges and there is a real wonder built in 1870 on the Union Pacific line there.
I have shot this bridge many times but never with a sunset, and wanted to try it. The conditions were perfect for Frame Averaging, as there was no wind. I had a very bright sun setting on the left side and almost no light to the right. I choose to expose for the highlights and try to pull up the shadows later. Normally this would be 4 shot bracket, but the ability frame averaging allows is really amazing. I have attached two screens shots. First shows the final image worked in C1 and the image without any adjustments, and the 2nd is just a crop, showing that the bridge, and the area below it was basically black. I have never found any camera that can pull up from black and still allow highlight recovery, no Phase Back for sure as the area under the bridge would be full of noise.
You can easily see plenty of details from the area under the bridge, which was in low or if any ambient light at all.
I like the grudge look on structures such as this, so I apologize in advance to those who prefer a different look. My point is really just to show how much recovery (clean recovery) is possible with Frame Averaging.
I have been hard on P1 as many other due to the missing firmware tools that the IQ4 has not received that previous P1 backs had and no Capture Pilot solution. But to be honest I can forgive a lot with this type of shadow recovery. I have never seen anything like this before from a single frame.
Shot with Area rm3di and 32mm Rodenstock, no CF, F11 (diffraction be damned) Note, slight haloing on the fine guard wire on the bridge rail, missed this at first easily fixed with "halo" suppression in C1