39

Your question is flawed, and you are making connections where there aren't any. Some people are short-sighted, some are long-sighted, and others are neither. This relates to the eye muscles not being able to draw light rays into focus at the retina. One wears glasses to correct for this, but the eye muscles are still used to bring objects into focus. So, you ...


37

(Normally I would not post an answer to a question I've already voted as a duplicate. But the danger of irreversible damage to a user's eyes compels me to write this.) We've all seen or heard this Henny Youngman joke: Translated to your situation, it goes something like this: Patient: "I looked at the sun through my camera's viewfinder and saw a black ...


20

There is more shutter lag because the shutter has to close first before opening again to expose the shot. When you turn on live view, the mirror is raised and the shutter is opened, so the image formed by the sensor can be fed constantly to the LCD. When you take a shot in live view, the shutter closes again to 'reset' the sensor before the actual exposure ...


18

It's important to realize that you don't actually look directly through the lens with an SLR! If you did, a periscope style arrangement would do just fine. What you are actually doing is looking at an image projected onto the focussing screen by the lens. This image is flipped left/right and up/down by the lens, and then up/down again by the main mirror. ...


17

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.


17

There are both advantages and disadvantages to EVFs. The very best ones with high-resolution and high-refresh rates are actually quite suitable for most uses when well-implemented. The main disadvantages are: Lag: There is a short lag between action happening in front of the camera and what you see. Dynamic-Range: EVFs are small LCD screens and have ...


15

I suspect the major reason this is true for DSLRs is to get the lightning-fast focus times that point-and-shoot cameras don't have. The autofocus mechanism is not actually part of the main CCD/CMOS sensor, but a separate device in the camera body, and the mirror splits the light coming through your lens so that half goes to the viewfinder and half goes to ...


14

You will not see a change of brightness through the viewfinder as the aperture is only stopped down when the photo is taken. This allows the auto focus sensors to focus accurately as many cannot focus below certain apertures. It also provides more light for you to compose your shot with. Many DSLRs have a "Depth-of-Field preview" button that stops the ...


13

Yes they do but so does your hand placed over the viewfinder. To take this shot last week I had the sun behind me. Without covering the viewfinder I got a strong veil and very low contrast image. Unfortunately, my viewfinder cover was attached to strap I forgot to bring. Luckily my hands were free during the exposure, so I retook the shot and got a crisp ...


13

Pros of using an EVF as opposed to the rear LCD screen: It is easier to see in direct sunlight. Holding the camera to the eye increases stability and comfort (especially with heavier lenses). EVFs offers diopter correction so users don't need to wear eyeglasses.


13

As 40-something human, I totally understand your question. As you get to about this age, your eye looses flexibility, and it becomes impossible to change the focus distance of your eye like young people can. This is why there are bifocals — by looking through different parts of such glasses, you at least get two options. "Progressive" lenses are basically ...


13

Solved. I accidentally placed the focusing screen by flipping it on other side which made in focus objects blurry. I corrected it and it's back to normal now.


12

The percentage dictates how much of the capture scene is visible to you before the capture. A true WYSIWYG situation is a 100% viewfinder because what you see with your eye will be what your final image gets. Anything less than 100% means that there are elements that will be captured in the scene that you cannot see at the time you look through the ...


11

You can move your head around, and the frame will line up differently depending on your exact point of view. And wearing glasses, the frame will seem even smaller than without - because your eye is further away. Cropping is far easier than synthesizing something you thought would end up in frame, but actually didn't. The viewfinder on a rangefinder camera ...


11

It's the number of shots remaining (hence the "r") that you can take and store on your card. When you half-press the shutter button, the number changes to the number of shots remaining in your memory buffer (pictures stored in memory that haven't been written to the storage card yet). This lets you know how many more shots you can take in "CH" (continuous ...


10

In my experience, transitioning from 95% to 100% made a significant difference in my photography. The 5% can hide a decent amount. Shooting a lot of wide-angle means that there can be a lot in the missing 5%. It's easy with my 10-22mm on my 7D to capture the foot of my tripod in that extra 5% and I'd rather not crop the image. You can't easily judge what ...


10

Inside the viewfinder is a convex lens which enables your eye to focus on the screen. This works in exactly the same way as convex lens used in a pair of glasses to correct long sightedness. The power of this lens is usually adjustable via a small dial next to the eyepiece to account for differences in people's eyesight. Some people who wear glasses have ...


10

Well, the viewfinder itself is not going to cause infections, but some of the germs that cause conjunctivitis are highly contagious. If you're passing your camera to people with red eye, ask them to wash their hands and to use the LCD screen instead. In general, though, these germs are not particularly long-lived away from a human host. Just letting the ...


10

It sounds like you're observing the laser etched glass focussing screen. A focusing screen requires a rough surface so an image can be formed for you to view through the viewfinder. Ground glass used to be used for this purpose but now glass etched in a circular pattern with a laser is used, to improve the brightness of the viewfinder when used with slower ...


10

There are two main possibilities I can think of. The easiest is that you may have inadvertently adjusted the diopter setting on your view finder. This would make the entire thing look slightly blurry. If this is the problem, fixing it should be as simple as adjusting the diopter dial near the viewfinder itself. The other potential problem is that the ...


10

That's how it's meant to look. Refer the manual from Canon's website, page 23: Refer also p36: the top LCD should be the same.


10

Pushing the camera towards your head will significantly stabilize the framing; I, for one, need a faster shutter speed when shooting without looking through the VF. Also, it is less strenuous to use the camera close to the body. I also like that the distance between my eye and the EVF does not change (that much) compared to the rear LCD, so I can be fairly ...


8

What you're missing is the edges of what will show up in the picture. Exactly how much on which sides is open to question -- typically what you see won't be perfectly centered in the picture.


8

Well, first I should mention that dust on the focusing screen has no effect on the image quality or the exposure metering, so for that sake there is no need to clean it. On the other hand the dust may get loose and get onto the sensor, so it's a good preventive measure tog get the worst dust away at least. To clean it, you should first turn the camera off, ...


8

There are several menu settings that affect when the red illumination of focus points is activated. By default, the red indicator lights will only illuminate over the active focus points when focus is achieved and the brightness of the scene in the viewfinder is low. You can modify this in the menu settings. Under the AF 5 (purple) tab, select VF display ...


8

It seems like you have mirror lockup enabled. The first full press of the shutter button will cause the mirror to move up (just as it does before taking a normal photo using the viewfinder) but the shutter will not be opened. A second full press of the shutter button will activate the shutter to take the photo. If the shutter is not pressed again for 30 ...


8

Could someone please tell me what it does, or at least what it's called, so I can look it up? Scottbb's answer is correct and you should accept it, but I wanted to follow up with a little more information about how to find the answer in case you have others like it. There's a diagram on page 6 of the Nikon D5500 user manual (PDF) that describes the ...


8

Electronic viewfinder Pros: Potentially smaller and lighter camera bodies and lenses (particularly wide angle lenses) Can zoom in to verify precise focus and depth of field Can see (almost) exactly what the camera sees, even in low light Can superimpose more complex data over the image (e.g. zebra stripes, focus peaking); see note below. No mirror assembly ...


7

As Mike Johnston explains the viewfinders, the focusing screens used in modern cameras tend to be made super-bright in order to accommodate the slow zoom lenses that often get connected, but this brighter construction (like an array of miniature lenses, or a bunch of very short fiber-optic cables) also makes much of the image to appear in focus, much more so ...


7

Yes completely normal and nothing to worry about. As you are aware all SLR / DSLR cameras have a prism / mirror / eyepiece, which can collect dust just as easily as any other part of your camera. I can only assume that you do not keep your D7100 in a particularly sanitary conditions - as my D70, D300 and D800 have never suffered with viewfinder dust to a ...


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