Smallest F-Stop on camera lens?
The lens involves the aperture - the adjustable gap that lets the sunshine by way of to the film or sensor. That you would be able to most effective manipulate the aperture in the lens (none within the digital camera), though the digital camera (quite often) can keep up a correspondence with the lens to set the aperture in it. Normally that you could get a handbook len (lolder ones in most cases) and these will also be adjusted by hand - once more on the lens. The f number denotes how open this aperture is, and the way far open it can be. This stages from zero upwards with zero being wholly open. The smaller the number in general the better great lens it is going to be (higher glass lens in it so when aperture is vast open there is less distortion from the lens). Smaller f quantity allows for a shorter focal size - that signifies that the bits within the image which might be in focal point are nearer together - so good for shut up shots and so on. So lens has possibly f/1.Four as a minimum on hand, but the digicam widens the aperture within the lens to f/eight or anything as required through its prgramming. Put the lens on and the camera will have to do the relaxation As an apart - which you can get adaptors to put other makes lenses on a digicam physique (probably more cost-effective), and of direction if yet another make the digicam can't speak to the lens, that you could set the digital camera to f/0 and then it'll expect the aperture is utterly open and determine the publicity time centered on the sunshine it senses as a substitute than what it assumes will come via the lens when it closes the aperture because it takes a snapshot. Whatever like that anyway.
Smallest F-Stop on camera lens?
The lens involves the aperture - the adjustable gap that lets the sunshine by way of to the film or sensor. That you would be able to most effective manipulate the aperture in the lens (none within the digital camera), though the digital camera (quite often) can keep up a correspondence with the lens to set the aperture in it. Normally that you could get a handbook len (lolder ones in most cases) and these will also be adjusted by hand - once more on the lens. The f number denotes how open this aperture is, and the way far open it can be. This stages from zero upwards with zero being wholly open. The smaller the number in general the better great lens it is going to be (higher glass lens in it so when aperture is vast open there is less distortion from the lens). Smaller f quantity allows for a shorter focal size - that signifies that the bits within the image which might be in focal point are nearer together - so good for shut up shots and so on. So lens has possibly f/1.Four as a minimum on hand, but the digicam widens the aperture within the lens to f/eight or anything as required through its prgramming. Put the lens on and the camera will have to do the relaxation As an apart - which you can get adaptors to put other makes lenses on a digicam physique (probably more cost-effective), and of direction if yet another make the digicam can't speak to the lens, that you could set the digital camera to f/0 and then it'll expect the aperture is utterly open and determine the publicity time centered on the sunshine it senses as a substitute than what it assumes will come via the lens when it closes the aperture because it takes a snapshot. Whatever like that anyway.
What is the smallest f-number on a nikon zoom lens? (I mean as in largest aperture opening)?
Perhaps one perplexing thing about photography many individuals have is the f/stops. F/stops are also referred to as aperture, or simply put, lens OPENING. First, let me explain that "f" does NOT mean "focal." It refers to a numerical equation wherein the "f" references a factor; it is a reference to the relative value of the lens opening as compared to the focal length of the lens. Let me explain further; f/2.8 is an opening that is almost 1/3 of the focal length of the lens. In other words, if the focal length of the lens is 4", and you have the lens aperture (f/stop) set at 4, then the size of the lens opening (aperture, or f/stop) is 1/4 of 4", which means the lens' size opening is 1-inch wide. So, if you're a bit confused with the f/openings, consider this: while 1/2 of something is small but it is larger than 1/3, and larger than 1/4... and larger than 1/8... and larger than 1/22. That is why the larger the number on the f/stop ring/knob, the smaller the f/opening (aperture). The SMALLEST f/stop you find can be anywhere from f/22 or f/32 (in some lenses not normally available now, the smallest f/stop was 1/62... that's really tiny!). Remember, as the numbers go up, the f/stop size goes down (or lens opening gets smaller... like with fractions, the larger the denominator, the smaller the fraction (from Latin "fracas," or "broken") represents. I know I'd rather have a 1/2 of a pie than an 1/8th... how about you? EDIT: by the way, Nikon puts out a 50mm f/1.2 manual focus lens (about $650 US), and I believe Canon also puts out a 50mm f/1.2L lens. I don't know offhand if there are faster lenses on the market.
What does "close aperture" & "parallel focal plane" means?
The instructions above tell you to make sure the photo (of an object) is in focus by closing down the aperture (http://en.wikipedia.org/wiki/Image:Aperu... so you will get more depth of field (http://en.wikipedia.org/wiki/Depth_of_fi... basically so the whole thing will be in focus. See this photo of this delcious, yummy dish: :-) http://i30.photobucket.com/albums/c317/w... Had I used a larger aperture, only a tiny bit of it would be in focus, the tip of the green on the top, or the first shrimp in the front. Everything else would be really blurry. A comparison would also be made here: http://i30.photobucket.com/albums/c317/wtin/2fdf10ea.jpg Same lens (Canon 50 mm f 1.8). Same camera (Canon 5D). Same subject, my nephew, (and standing at almost the same distant). Left photo taken with aperture of 1.8 (wide open), and the other at f 5.6. They also want you to make sure the subject is parallel to the focal plane. This means they want you to look at the subject from the top view. The photo above of the food was taken from a couple of feet away from the side (looking down). What I think they want you to do is take a photo of it looking down (or have the object propped up on the side so you'll point the camera at it directly). I don't quite agree with it unless it is a photo of, say, a map, which needs to be flat at all time. This requires that you have a camera that you can set a few of the settings. I hope I am a bit helpful.
What does "aperture range" mean?
In optics, an aperture is a hole or an opening through which light is admitted. More specifically, the aperture of an optical system is the opening that determines the cone angle of a bundle of rays that come to a focus in the image plane. An optical system typically has many openings, or structures that limit the ray bundles (ray bundles are also known as pencils of light). These structures may be the edge of a lens or mirror, or a ring or other fixture that holds an optical element in place, or may be a special element such as a diaphragm placed in the optical path deliberately to limit the light admitted by the system. In general, these structures are called stops, and the aperture stop is the stop that determines the ray cone angle, or equivalently the brightness, at an image point. In some contexts, especially in photography and astronomy, aperture refers to the diameter of the aperture stop rather than the physical stop or the opening itself. For example, in a telescope the aperture stop is typically the edges of the objective lens or mirror (or of the mount that holds it). One then speaks of a telescope as having, for example, a 100 centimeter aperture. Note that the aperture stop is not necessarily the smallest stop in the system. Magnification and demagnification by lenses and other elements can cause a relatively large stop to be the aperture stop for the system. Sometimes stops and diaphragms are called apertures, even when they are not the aperture stop of the system. The word aperture is also used in other contexts to indicate a system which blocks off light outside a certain region. In astronomy for example, a photometric aperture around a star usually corresponds to a circular window around the image of a star within which the light intensity is summed.[1]
What does the f stop on lenses mean?
The f-stop (aka aperture) is what determines how much light is admitted through the lens. Its an inverse relationship - f1.4 would be the largest opening - the lens would be said to be "wide open" while f16 would be the smallest opening - the lens would be said to be "fully stopped down". Correct exposure is determined by the available light, ISO, f-stop and shutter speed. On a sunny day a "wide open" lens would give you a fast shutter speed. A "fully stopped down" lens will give a much longer shutter speed. Each f-stop going up the scale (f1.4 to f2 to f2.8, etc) decreases the amount of light by 1/2. So f2 admits 1/2 as much light as f1.4; f2.8 admits 1/2 as much light as f2; f4 admits 1/2 as much light as f2.8, etc. With less light admitted the shutter has to stay open longer. I hope this example doesn't confuse you. It is purely hypothetical for illustration only to show the shutter speed-f-stop relationship. We are shooting on a sunny day with ISO 100. f1.4 @ 1/1000 sec. f2 @ 1/500 sec. f2.8 @ 1/250 sec. f4 @ 1/125 sec. f5.6 @ 1/60 sec. f8 @ 1/30 sec. f11 @ 1/15 sec. f16 @ 1/8 sec. Since ISO is a measure of the sensitivity to light of an imaging surface - film or digital - the less light admitted the longer the shutter has to be open to expose the imaging surface for correct exposure at a given ISO. In our example using ISO 100 we have an imaging device that is slow to respond to light. If, in our example, we were using ISO 200 our shutter speed would change as shown in this example: f1.4 @ 1/2000 sec. f2 @ 1/1000 sec. f2.8 @ 1/500 sec. f4 @ 1/250 sec. etc. If we change to ISO 400: f1.4 @ 1/4000 sec. f2 @ 1/2000 sec. f2.8 @ 1/1000 sec. f4 @ 1/500 sec. etc. As you can easily see the more sensitive our imaging surface the faster the shutter speed at any f-stop. The f-stop also controls Depth of Field (DOF) but that is a topic best left for another time.