- Joined
- May 24, 2006
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I wear glasses, albeit with a relatively weak prescription. If I am focusing through the viewfinder of my D3100, am I focusing correctly, or am I focusing to my lens's corretcion, resulting in a fuzzy image?
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Focusing with glasses
- Thread starter Modred189
- Start date
The problem isn't with your eyes, it's with the cheap viewfinder in modern DSLRs. They don't accurately show depth of field to let you see what's in focus, making it pretty much impossible to manually focus by sight, especially with wide aperture lenses. There's a diopter adjustment to the right of your viewfinder, it's a small knob. You should make adjustments until the focus points on your camera look in-focus to you.
Other than that, if you're manually focusing, then place your autofocus point over the area you're trying to focus on and it should give you an indicator of whether you're in focus or not, or which direction you need to go in. You may need to refer to your manual, look for "digital rangefinder" or "electronic rangefinder."
Other than that, if you're manually focusing, then place your autofocus point over the area you're trying to focus on and it should give you an indicator of whether you're in focus or not, or which direction you need to go in. You may need to refer to your manual, look for "digital rangefinder" or "electronic rangefinder."
- Joined
- Sep 27, 2005
- Messages
- 11,646
I wear glasses with a moderately strong prescription of -4.25 or something silly like that. When I used my D80, it was mostly in "shoot and pray" method. Framing the shot was more challenging to me than anything else.
In addition to what Daggah has already mentioned, upgrading to full frame with a really awesome viewfinder has helped me tremendously. I'm not saying you should take a jump to FF just because of that, but I can vouch for its benefits.
In addition to what Daggah has already mentioned, upgrading to full frame with a really awesome viewfinder has helped me tremendously. I'm not saying you should take a jump to FF just because of that, but I can vouch for its benefits.
The viewfinder has its own separate focus dial ("diopter adjustment") on the side that adjusts the focus of the image in the viewfinder from what is project through the prism. The view through the viewfinder won't effect the auto focus of the camera. The D3100 has a diopter range of -1.7 to +0.5.
You have two options:
1. You look over your glasses, and adjust that little wee dial so the viewfinder is corrected + or - for your glass prescription. Go outside or in a bright room, stick your face up to the camera and look over your glasses into the viewfinder and rotate that dial up or down until the picture looks as sharp as possible. There you go. It'll look sharp for you, but if other people use your camera it'll look fuzzy. Depending on your prescription strength the it might not be able to adjust enough. If it still doesn't get sharp enough you'll need to use option 2 of looking through your glasses.
2. Look through your glasses. Then move the diopter dial. You should be able to get the view sharp, since your glasses are doing the heavy lifting.
The view in a D3100, will look smaller and dimmer than a view from a D90, D300, D700 etc. The little plastic prisms they use in the cheaper consumer cameras, can only do so much. It is one of the negative trade-offs we make for such a small and portable camera.
You have two options:
1. You look over your glasses, and adjust that little wee dial so the viewfinder is corrected + or - for your glass prescription. Go outside or in a bright room, stick your face up to the camera and look over your glasses into the viewfinder and rotate that dial up or down until the picture looks as sharp as possible. There you go. It'll look sharp for you, but if other people use your camera it'll look fuzzy. Depending on your prescription strength the it might not be able to adjust enough. If it still doesn't get sharp enough you'll need to use option 2 of looking through your glasses.
2. Look through your glasses. Then move the diopter dial. You should be able to get the view sharp, since your glasses are doing the heavy lifting.
The view in a D3100, will look smaller and dimmer than a view from a D90, D300, D700 etc. The little plastic prisms they use in the cheaper consumer cameras, can only do so much. It is one of the negative trade-offs we make for such a small and portable camera.