 Hey how you doing? It's Greg back to here and in this video I'm going to show you how to calibrate your lenses using the Nikon AF fine tune feature or autofocus fine tune and in this video we're going to be using the spider lens cal. All right let's get started. In this video I'm using the spider lens cal and you can find that on Amazon. I'll put a link below in the description box you can easily click on that link and find it on Amazon. Also this is a helpful tool it's a lens align distance tool. So how this works is you put in your camera data here. So if you're using a full-frame camera Canon Nikon Sony or a crop sensor you would choose that selection then you use the focal length of the lens that you want to calibrate. So for example if you're calibrating an 85mm lens and your minimum aperture is f14 you would set that here so 85mm f14 and then you would click on use suggested distance and you could see here suggested minimum autofocus 6.97 or 7 feet if you're using the metric system you can choose meters here and then what you would do is you would just measure the distance from your camera that's on a tripod to the lens align tool so 7 feet from your camera lens to the lens align tool that would be the minimum suggested distance and then again you would go to 50mm if you were doing a 50mm I think you're getting the idea the aperture let's say it's 2.8 you would set that you'd set your lens to 2.8 make sure that you're at the minimum and then you would use suggested distance and again change to 4.10 feet you'd measure that distance so that's how that works. So once you have your distance you set up your spider lens cal on a level tripod and at the same height you set up your camera on a level tripod at the correct distance for your lens and then for better results I recommend shooting tethered here I am using capture one so I can get a better look. So I highly recommend shooting tethered whether it be to lightroom or capture one here we are in capture one and you can zoom in even further so by hitting command plus on my keyboard I can zoom in a little bit closer into capture one you can see I've got a really zoomed in look and you can see here that I'm forward focusing so we want the zero mark to be in sharp focus and you can see here that everything forward of the zero mark one two three four even five four and five they look the sharpest so we want ideally the zero point to be sharper so I made an adjustment with the autofocus fine tune and you can see here to zoom out so you can see that that now we're back focusing so you can see the difference so the first one is forward focusing the second shot we went too far in the wrong direction now we're aft focusing so what we want is the best balance so a command plus to zoom in so we want the zero to be sharp and then the best balance between say plus three and minus three we really want to get in that range and that will ensure that when you're at your minimum focus or your aperture say f14 or 2.8 if you're shooting at the minimum aperture of your lens that you're in fact shooting sharp and in focus so if you aim at someone's eye then their eye is in focus so that's why it's important to calibrate your lens using something like the spider lens cal now to make the adjustments on your Nikon press the menu button and look for the little wrench icon and then look for AF fine tune at the bottom right there click on AF fine tune and you can see here AF fine tune turn that on then go to saved value this is where you do your adjustment so plus or minus 20 up to 20 plus or minus and then take a shot and then just compare it and then if you went the wrong way like I showed you in that example just keep fine tuning that and then you can also save these values up to 20 different lenses there's the 105 1.4 right there hey it's going back to here again and I just want to remind you in the beginning of the video I showed you the online distance calculator I'm going to put a link to that below in the description box I was going to do is click on that link and put in your lens type now if you found this video helpful please share it on the web and photography groups and forums also if you're not already a subscriber hit that subscribe button also hit that like button now one last thing too if you look below this video you'll see my name cragbecht if you click on that that'll take you to my channel and if you click on videos you'll see I have over 100 videos covering photography and retouching check out some of those videos as well all right thanks again and I'll see you in the next video