How to adjust the lens-focus? - Samsung HCM4216W 42" Rear Projection Television

Let me start with a guess. There is a diopter adjuster just behind the viewfinder. If it is adjusted way off from the correction you need, everything will look no better than out of focus though your photos may look fine. Google how to adjust the diopter setting on the D3200 and see if that won't take care of the problem.

Here is one of the secrets: your camera has so many adjustments that if someone else picks up your camera, they may change a setting leaving you wondering what happened and why. Be cautious.

If that guess is not the cause, let us continue. Are you saying that when you switch the lens setting from A to M, it still will not manually focus? Some of the lenses are mostly made for autofocussing, so the focus ring that you have to turn for manual focus could be narrow and out at the very front of the lens. If you cannot manually focus, something may have happened to the inner works of your lens. Try another Nikon lens to see if it will autofocus. If it does, your lens requires servicing or replacing.

Good luck. Hope you get back to shooting soon.

Some webcams have a 'focus ring' to adjust the focus. I do not know if auto backup cams have such a thing built right onto the camera lens. Adjust that focus until the pic is clear.

Check the lenses inside the lens tube and see if they are loose or out of place

The individual lens have a lug nut that when loosened allows the lens to be turned-----cover red and blue lens and call up the convergence grid---from the rear adjust that lens until the green lines are in good focus(can also do the red in and the blue if needed)


You will get no more advantage as the manual focus controls on the splitter block have very limited range.


when done carefully tighten the wing nuts on the lens back tight.

The lens needs servicing, because the lens is stiff the auto focus motor cannot turn the lens to focus.

in manual mode, will not try to focus itself, my be the manual auto switch is faulty, or the focus related mechanism not rotating the lens, open the lens carefully check the focus motor and gear set (engine is the technical term)

Most WEBcam have a focus adjustment at the lens. Turn the focus ring in front of the lens to adjust the focus.

try adjusting the lens focus, the one I use has a screw in lens which adjusts the focus of the image being captured

adjust the lens on the front turn it left or right until image is clear.

1)Remove rear cover = clean RGB lens with soft cloth
2)Remove front speaker grill cover and access panel
Locate screen / focus block = adjust RGB focus controls
3)Last,if needed, unlock each focus lens cap = adjust then lock
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