I have a Nikon D3000 and it doesn't have an internal autofocus motor. I also have a 50mm f1.8 lens that I have to manually focus with my D3000. I find it rather difficult to get the focus perfect. Does anyone know of a way to "validate" the focus of the lens so it can tell me when the focus is perfect?
Manual focus is practically prehistoric today, for some reason.
Considering that the point of SLR's was to use the human eyeball to see via the pentaprism exactly what the lens was seeing and for many years millions of pin sharp photos were produced using this method it's alarming that current users rely on motorized auto focus to provide what nature gave us for free.
Now, it may be that you have less than perfect sight (many of us do, I always managed to focus accurately with extreme short sightedness) and most manufacturers can supply a corrective lens to slip over the viewfinder for this purpose, but I suspect all you need to do is take LOTS of pictures, try taking the f-stop down, it will slow your exposure/shutter speed but will give you more depth of field and more leeway on focusing.
Try this, put your camera in Auto focus mode, press the shutter button half way down and manually focus the lens until the in focus indicator in the fiewfinder ( > 0 < ) shows it is in focus. It may not work in dim light. If that doesn't work, try the same in manual focus mode.
Answer by Alan on 11 Jan 2010 08:23:04Look in your user manual for something called "electronic rangefinder". There is a little green dot on the lower left hand side of the view finder that blinks when you are close to being in focus and becomes a steady light when your lens is in focus.
Answer by fhotoace on 11 Jan 2010 08:40:08That camera comes with a lens with an external autofocus motor, but I guess you do not have that or don't want to use it. Try holding the focus down for it to try to autofocus and then manually focus it, this could get it to register.
If you are unable to get the focus perfect in manual focus mode, you should adjust the little viewfinder on the camera. There is a wheel there that will slide that glass back and forth changing the focus. Try moving this at each step and taking some test pictures. This will change what you perceive to be focused, one of them will match up with what really is in focus.
I'm not totally sure as my Nikon is the old film F-801 but I recall there is a dot that appears in the viewfinder when focus is dead-on with AF or manual lenses. Check your camera's manual to confirm this.
Answer by keerok on 11 Jan 2010 04:35:16
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