This was the closest I could get under the new Old bridge while taking photos of it on Sunday. I got right at the fence, and thankfully, my tripod was high enough to have the camera over it :)
This is a three shot HDR, created in Oloneo Photoengine, finished in Photoshop. I actually used two different ISO settings here. As I set the middle exposure to 30s, as I wanted a smaller aperture for the DOF, I had to bump the ISO to 400 for the +1EV.
Technique: Oloneo Photoengine, Number of exposures: 3, Camera Model: Sony a7R + Metabones MkIII Adapter, Lens: Canon 16-35mm F2.8, Focal length: 21mm, Aperture: 7.1, Middle exposure time: 30s, ISO: 200 & 400, Tripod used: yes, Location: 48.139597, 17.117554









For instance, if you change the aperture, making the opening smaller, you either have to use longer time, or bigger sensor sensitivity (ISO), or both, to compensate. If you choose smaller sensitivity (ISO), you have to have a bigger opening, longer time or both, to get a proper exposure. And so on.









