This is an excerpt from our new book on Developing Images in Lightroom (currently free).
Grain is a word used in film photography to describe the fineness of detail a film or paper is capable of capturing. Landscape photographers typically want the finest detail possible, which comes from fine grained films. Documentary photographers and journalists may need faster speeds (higher ISO’s) and will compromise detail for speedier films that have more grain. In digital, noise is the compromise we make for shooting faster ISO’s, and the latest camera’s biggest improvement is usually related to the detail maintained even at very high speed ISO’s.
So, if detail is the desired result, why would we want to add grain and reduce detail in an image? There are three reasons I might add grain.
To Cover Up Imperfections
First, If I’ve fouled up I might use grain to fix it. I liked this photograph of Jane and Cody in the desert, but the sharpest focus is actually on a rock behind the couple, leaving them just a little soft. This kind of thing drives me nuts! I’m a snob about where sharpness falls in a picture.
So I used the Grain adjustments to remove just enough detail that the difference in sharpness is unnoticed. Slide the Amount to the right and adjust the Size and Roughness. I think you’ll find that more Roughness is better than less; when Roughness approaches 0 it begins to look distinctly digital and distracting. Having altered Size and Roughness, go back up to Amount and see if you can get away with less.
Here’s another image where focus was way off, but the expression made the image worthwhile, so adding grain made the thing more artsy.
The sharp focus is no longer distractingly inaccurate, and there’s the added bonus of a vintage look, which is the next reason to add grain.
Grain is Cool
Let’s face it, shooting film is hip. In fact, Kodak had a booth all about film at WPPI this year, and that’s the first time I’ve seen them there. I live in Portland where hipsters abound, and old cameras are selling for more than new.
One of the big allures of film is the classic look of the grain. Simply adding a bit of grain to an image helps remove the focus on technical perfection and emphasizes the composition and color and tones. Add grain, then sculpt it to perfection. Come back an hour later and look at the image again with fresh eyes to see if it’s too much. If you’re like me, you’ll do too much at first, and but with time you’ll refine a style to your grain use.
Reduce Noise Reduction
The third reason I add grain to an image is to ease Noise Reduction. Noise Reduction is a great boon, but it may leave my photograph looking something from Barbie Doll world, with skin that’s just too smooth and everything looking like molded plastic.
Adding a little grain back in makes the image more believable. In this case, I’d be very gentle. This portrait was shot at ISO 25,600 on my old D700. It’s got all kinds of grid-like noise and color noise from the high ISO. Here you can see the original, the noise reduced version, and the grain added version.
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