Forgotten in its old age

by Aditya

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41

What you're looking at through the viewfinder is actually the image from the lens projected onto a ground-glass viewing screen. You want the diopter to be adjusted so you can see that most clearly. Fortunately, this means that you can use the etched lines on the focusing screen, as well as the status information in the viewfinder, to adjust the diopter. ...


15

That control adjusts the diopter, an optical adjustment to the viewfinder that allows folks with varying vision abilities to see things clearly. Think of it a bit like reading glasses - it allows for minor vision correction. The idea is that folks who have decent vision but might need minor correction can make an adjustment on the diopter so that as they ...


13

You certainly knocked the diopter adjustement out of place. It is there to compensate for people who need eye-glasses. With your eye looking through the viewfinder, adjust the knob on the upper right side until you see what is in focus clearly sharp.


8

The other posters explained what this dial is. To complete the answers, here's how and why to use it. Assuming you wear glasses with a small enough number, you can set the diopter dial to compensate for your vision imperfection. The way to do that is usually to set the dial such that the numbers and indicators in your viewfinder (like aperture and speed ...


6

One of your problems is that the matte screen in your camera (this is what you are actually looking at through the viewfinder, it's a semi-transparent plastic screen that sits at the top of the mirror-house, below the prism housing) is designed to give a nice bright useable image through a slow autofocus lens such as your average f/3.5-5.6 consumer zoom. ...


6

Take a look at the focus screen in your camera. That actually has the same focus as the object in focus, and it's a lot easier to see. Adjust it until you see the thinnest lines possible, and you are set. Optionally, you can actually remove the lens to do this, as it makes it easier to not be confused by an object in the scene.


5

I just look at the LCD display you get in the viewfinder (that tells you your shutter speed, aperture etc.) and twist the diopter knob till that is at its sharpest.


4

At f/1.4 your DOF is going to be very narrow. Even in good light you can easily miss focus, so there's no silver bullet that's going to be foolproof. The green focus lock light in your viewfinder will still function in manual mode, so as you focus keep an eye on the green indicator. Of course if AF is hunting, the AF lock indicator will probably not be ...


4

That is the dioptre adjustment wheel. A "dioptre" (or sometimes diopter) is the measure of optical power in a lens. Usually, cameras have a -3 to +1 dioptre control that adjusts where the viewfinder focuses. It is not a very powerful adjustment, and is generally intended to allow users with minor vision imperfection (very slight near or far sightedness) to ...


4

Switch live view on, zoom all the way in (using the live view zoom function, not the lens) and use the enlarged image to judge focus. If you are using a wide aperture you should probably also put the camera on a tripod to help you prevent camera movement while focusing. This method had its limitations (for example it doesn't work at all if the subject is ...


3

This is really a personal setting. Even if you have "perfect vision", you want to set this to a custom setting for yourself. Put the camera on a tripod, autofocus the camera at something bright with good texture, and adjust the diopter to your liking. Some DSLR's have a marking at the "default" position, but not all. Personally I don't believe the default ...


2

Yeah, there is no perfect setting really. And if there is a mid-point/default, it's generally just a reference to which way is +/-. It's not only for people with a difference in vision, it's also for people who use glasses while shooting. As said above, adjust it to your liking. After some googling it looks like you can get eye cups/pieces with a +1.0 or ...


1

Diopter adjustment. If you need glasses, you can use this little wheel approximate the correction your glasses provide. Then, it's easier for you to shoot without your glasses on.



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