Using GND Filters for a One-Shot HDR Panorama – How We Shot It
I’m not sure whether to call this a One-Shot HDR, or an HDR Panorama, or just a Panorama. This image is created from four original frames, but they were panned and not bracketed. So I’m just going to call it a one-shot HDR Panorama. You can call it whatever you like! ;-)
The Equipment and Settings
- Nikon D70
- Tokina 17mm f/3.5 ATX Pro (Extremely rare!)
- Giottos Tripod
- 1/3 sec @ f/16 & ISO 200
- Manual Exposure, Manual WB, RAW
The Shooting Conditions
One technique for creating “One Shot HDR” images that few people talk about these days is an oldschool method- using a GND filter to manage the dynamic range of single exposures.
Some may argue that true HDR photography must be bracketed and “tonemapped” in order for it to be called an HDR, but in my opinion the term has become universal and is acceptable to use in describing any scene that has a high level of dynamic range regardless of whether it took one image to achieve, or multiple bracketed images, or other tools such as GND filters.
A brief explanation of what a GND filter is, for those of you “newschool” HDR photographers who may have never even shot on film before: GND stands for Graduated Neutral Density, and usually it is a square filter that is mounted over your lens in a sliding holder. The square filter is half dark, and half clear, with a gradual transition between zero and 3-6 EV’s.
Most commonly, you use a GND filter by placing the darker part over the bright sky in your exposure, while the foreground is not “blocked” by the 3-6 stops of neutral density. Thus you can create a single that would have required a 3-6 stop bracket to achieve otherwise.
By the way, neutral density just means that the filter doesn’t have any sort of effect other than darkening. The best GND filters have zero color shifting, while the cheap-o ones might give your images a slightly weird hue. This used to be a huge issue when shooting on film, but now with digital photography you can usually correct any GND filter flaws with your temperature and tint sliders.
[FAQ: What is HDR Photography?]
Anyways, I created this image as a 4-shot panorama, with a 17mm lens oriented vertically on a crop-sensor DSLR. The original, un-edited frames looked like this:
Once again, I found myself browsing old archives from 2007 using Adobe Bridge CS6. To watch a video on how easy it can be to hunt down old photos using Bridge and Windows Explorer or Apple’s Finder, click HERE!
I prepared the original frames in a two-step process: creating the foundation for overall editing as quickly as possible, and spending time to fine tune the tones with gradients and local brushes.
I used the SLR Lounge Preset System (for Adobe Camera Raw CS6) to create a simple HDR foundation, basically brightening the shadows and reducing the highlights if necessary. This image was slightly under-exposed, so I opted to leave the highlights and whites relatively neutral and just bump up the shadows.
Then I applied a small amount of burning & dodging and graduated filters, but I knew that I would rather complete that process after merging. Click HERE to watch a video on how I use Photoshop CS6’s automated Panorama feature.
Check out the prepped original frames and the final image below:
Take care, and happy clicking!
Learn HDR Photography
For more HDR education, be sure to check out HDR Tutorial by SLR Lounge. This comprehensive “gold standard” guide will give you a mastery of HDR photography, from the scene considerations to the actual shooting to the post production. Click here for more info.
The SLR Lounge Preset System
The SLR Lounge Preset System is designed to enable users to achieve virtually any look and effect within 3-5 simple clicks. From basic color correction, vintage fades, black & white effects, tilt-shift effects, faux HDR, retouching, detail enhancing, and so much more. The sky is the limit with what has been dubbed the most powerful and intuitive preset system available. Click the link above to learn more/purchase! The SLR Lounge Preset System is now available for both Lightroom 4 and Adobe Camera Raw! (Bridge CS6)
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