Only the other day I was working a job for a local pub which has just undergone an extensive make-over. I’d done the interiors one day, some lovely sunset shots another evening but the client also wanted some images of their new beer garden in the sunshine. This meant that I’d be shooting in the worst light possible - the midday sun. But in the middle of a lovely sunny day is when people are most likely to be looking for a beer garden to sit in and enjoy a nice cold pint, and of course, the client is always right. Eek! Flash was out. I’d have needed more power than the Hadron Collider to produce enough light to cover the necessaries and over power the sun, so combining bracketed exposures* was the only way to go. A “correctly” exposed image simply blew the sky off the chart. Tweak it the other way and parts of the building were total black, but by shooting bracketed exposures I was able to merge these in LR Enfuse back at the ranch and produce images that were far more akin to what my naked eye was seeing. The reason being that the naked eye can see a range from dark to light over roughly 27 stops, but most digital camera sensors can only see between 9 and 13. So if I’m looking at the scene below of the lone tree at sunset in the High Peaks, my eyes can see the details in the sky of the clouds and the vapour trails and at the same time it can see detail in the tree. The camera can’t. It’s a technology thing. Digital sensors aren’t anywhere near as good as the marvellous feat of engineering that is the human eye, yet. So if I set the camera to expose for the sky, then the tree is in total black with little definition, and vice-versa, if I expose for the tree, then the sky ends up completely white. So by making a series of exposures across the spectrum, the software back on my iMac can merge them all together and produce a “realistic” image.
Anyway, that’s my two cents on the subject. HDR is a tool like anything else; tripod, lenses, software, they-re all their to be used how you see fit. Discount them at your peril.
* Bracketing exposures means taking a series of images of the same scene but under and overexposing. My ageing Nikon’s will, with a quick toggle of a dial, shoot a series of up to 9 bracketed images, 4 stops over and under. This used to be my method of working but I found that I often ended up with tons of images in the bracketed series that I simply didn’t use. If it’s a 4 stop over and under bracket that I need, then I’ll manually dial in the exposures and shoot -4, -2,0, +2 & +4 meaning that I’m only filling the card with 55% of the space I was previously using. Over the course of an extended shoot, this can be GBs of data I’m saving. But that’s my preference. Auto bracketing works very well too!