How to do Focus Stacking with the Nikon D850 Focus Shift Feature
Most of the time when youre out there taking sweet sweet pictures, you dont want the entire scene to be in focus - you’d probably rather draw your viewer into what you’ve decided is the most important thing in the frame. But thats not always the case. Product photography and especially when using a MACRO lens, requires something of a special technique thats only been made easy fairly recently in the grand scheme of photography. Its called FOCUS STACKING! (This method is used a lot in landscapes also, same thing, you want to control more of whats in focus, beyond your lens’ native ability to do so).
Lets say it is your intention to sell this drone battery on Ebay but you want to have a SUPER slick, really professional looking close up photo of it to stand out from everyone else. You pull out your 105mm 2.8 MACRO Nikkor lens and frame it up, shooting the battery from an angle with the text on the back in full view.. Much to your surprise only a tiny bit of that text is legible because the depth of field is so narrow, even at f/8. Sure, you could crank the aperture closed down as far as it goes, but even into the F/20’s the whole scene isn’t in focus, and beyond that youre going to be losing quality in the image. Plus, you have it on good authority that for this lens, f/10 is really the sweet spot. Enter, Focus Stacking.
#Nikon #D850 #FocusStacking
If you’ve got the Nikon D850, You’ve got a setting in the menus called Focus Shift where you can tell your camera to take a series of pictures, and in between each frame, move the focus outward towards infinity, just a tad. Then using Lightroom and Photoshop, bim bam boom, you’ve got a picture with total control over whats in focus. Heres how to do it.
First, make sure the following is true for your camera, otherwise the focus stacking mode will be greyed out with no further instruction from your camera on how to make it usable.
If your lens itself has an Auto focus switch, make sure its on. Make sure your camera is set to AF. If youre using a tripod turn stabilization OFF.
Make sure auto Bracketing is set to 0 and Set your Focus mode to singe point. That should make it so the feature is available.
Now in the photoshoot menu, down towards the bottom of the last page go into the focus shift shooting menu. You can set it to take up to 300 pictures (thats a ton of photos, were going to use 11.) Next you choose how far it steps forward the focus between each shot. You might need to experiment a tiny bit with this because your needs will change depending on if youre taking pictures of a tiny thing like a battery, or a big thing like a car, or a massive thing like a ravine you found in Utah on a road trip with your wife and her dad. For this purpose were going to set this to 8.
I have my lens set to f/10 and its on a tripod so there is no movement between pictures, and press start!
Now you’ve got 11 photos of the same thing with the focus shifted slightly forward on each photo. Import these into lightroom, now is a fine time if you want to do any edits to your photos, you can just edit one of them to your liking, and then press command+c on that one photo, select the other 10 photos and press shift+command+V to paste the edit you did on the one, across all the rest.
Next, select all 11 photos, go up to edit in photoshop as layers. This will automatically open photoshop with one file that has each of your photos on a separate layer. Now, in the edit pull down menu, select auto align, you can leave this on auto. As the glass moved through your lens changing the focus, it also changed the perspective of the image oh so slightly, and photoshop will put every pixel in order for the next part. Back to the edit pull down menu, and choose auto blend layers, these should be the default options and hit ok and depending on the power of your computer this might take a minute.
Once its done, you can see all the masks on each layer, it makes a master file on top of everything else, but if youre curious what it did and to make little tweaks, you can hide all the layers and show one at a time to build up the photo and see the focal planes it used in each one. If you select the mask and choose a white brush tool, youre able to edit the masks if photoshop messed up anywhere.
Once youre satisfied, you can merge everything into one layer and there you have it. A totally in focus macro shot of a drone battery. Follow all these same steps for a landscape shot.
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