ISO 51,200 with the Laowa 9mm f2.8
4
I shot this tonight - for me it's an exciting shot as I feel it pushes the absolute limits of the M system in several ways.
It was pushed in DxO Photolab 6 fully 4 stops to ISO 51,200 --- then had some shadow enhancement which pushes parts of it even higher. I used Deep Prime XD de-noise which did an amazing job.
It was shot with the Laowa 9mm f2.8 lens at f2.8. This lens is quite sharp and can 'do' low light photography well, like the Roki 12mm f2, Canon 32mm f1.4, and the Siggy trio.
It was shot in a sequence of 14 frames-per-second in order for me to pick the frame with the best composition. From previous experience I knew I had to shoot at 1/250 second to freeze the front of the train --- even with a 9mm lens.
I have also done some perspective adjustment with VIewpoint 4 to adjust the angle of the building and train for composition. I even stretched the lower right part of the frame outside the border using VP4 so that I could use more of the right side of the frame.
One trick I used was to export the image to full-res TIF --- then continue processing the much cleaner image before downsampling to 4k. Shooting at ISO 3200 gave me more than 3 stops extra dynamic range to work with --- from experience I know that if I had shot this image in-camera at ISO 51,200, it would have been pretty messy and I wouldn't have been able to get a result as good.
CSX local train Y295 GO BUCS! on the downtown Tampa Polk Street run. Canon M6ii, Laowa 9mm f2.8 lens, f2.8, 1/250s, shot at ISO 3200 (underexposed 4 stops), pushed past ISO 51,200 using DxO Photolab 6 with Deep Prime XD de-noise