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Nikon DSLR Cameras
D3300
D3300 unable to focus through the viewfinder
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<blockquote data-quote="aroy" data-source="post: 551007" data-attributes="member: 16090"><p>There can be two problems</p><p>1. With the AF module</p><p>2. With your eyes</p><p></p><p>1. AF Module is easy to check</p><p>. Put the camera on a tripod if you have one else on a sturdy support</p><p>. Look through the view finder and use AF-S to focus on an object at the centre, around 10 feet away</p><p>. Now start Live View</p><p>. Zoom in and check the focus</p><p></p><p>If the Live view focus is spot on after zooming (use a contrast edge, say a bench edge or a tree to get focus spot on) then AF module is fine. Repeat the check at various focal length if the lens is a zoom, some time the AF is off at certain focal lengths.</p><p></p><p>In case the AF module is not spot on then try with a few lenses. Please note that the D3xxx and D5xxx bodies have no fine adjustment for focusing lenses. A slight calibration error in AF-S lenses can lead to fuzzy focus.</p><p></p><p>If you are satisfied that the body AF is bad, exchange the body. If one particular lens's AF is off, exchange the lens,</p><p></p><p>2. Eyes. The View finder image is focused internally at a fixed distance. In case eyes are not able to focus at that distance, eyepiece correction is required. You may not even be aware of it, but the eyes may be off by more than the range of correction in the diopter correction provided (about +-1). In case the AF module check above is spot on, then eyes are the problem.</p><p></p><p>Get the eye power verified by an optometrist and buy a diopter correction eyepiece of the relevant range.</p></blockquote><p></p>
[QUOTE="aroy, post: 551007, member: 16090"] There can be two problems 1. With the AF module 2. With your eyes 1. AF Module is easy to check . Put the camera on a tripod if you have one else on a sturdy support . Look through the view finder and use AF-S to focus on an object at the centre, around 10 feet away . Now start Live View . Zoom in and check the focus If the Live view focus is spot on after zooming (use a contrast edge, say a bench edge or a tree to get focus spot on) then AF module is fine. Repeat the check at various focal length if the lens is a zoom, some time the AF is off at certain focal lengths. In case the AF module is not spot on then try with a few lenses. Please note that the D3xxx and D5xxx bodies have no fine adjustment for focusing lenses. A slight calibration error in AF-S lenses can lead to fuzzy focus. If you are satisfied that the body AF is bad, exchange the body. If one particular lens's AF is off, exchange the lens, 2. Eyes. The View finder image is focused internally at a fixed distance. In case eyes are not able to focus at that distance, eyepiece correction is required. You may not even be aware of it, but the eyes may be off by more than the range of correction in the diopter correction provided (about +-1). In case the AF module check above is spot on, then eyes are the problem. Get the eye power verified by an optometrist and buy a diopter correction eyepiece of the relevant range. [/QUOTE]
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Nikon DSLR Cameras
D3300
D3300 unable to focus through the viewfinder
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