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What it means 18mm - 200 mm in photo lens?
This describes the focal length range of the lens. It means that the lens can be set between 18mm (a wide angle which takes in a larger field of view) and 200mm (a telephoto, which creates a narrower field of view). ******* Note: the above is certainly true for 35mm format, but focal length is relative to the format. For 4x5 cameras, the equivalent "normal" focal length is around 200mm.
Lens of camera is identified by what numbers?
Most lenses are identified by their zoom range and aperture. A Nikon Nikkor 70-200mm VR II f/2.8 is a lens with a 70-200mm zoom range, Vibration Reduction II, and a maximum fixed aperture of 2.8 - in other words, a very expensive fast pro lens. A Nikon Nikkor 70-200mm VR f/4-5.6 offers the same optical range, but nowhere near the optical quality in low light situations because of its variable aperture and consumer grade quality.
What is the shutter type and speed range of a Nikon D3200?
Focal plane shutter with speeds from 30 seconds to 1/4,000 of a second.
What does mean the mm e.g. 18 -200 mm camera or 55-200 mm?
That number is the focal length of the camera's lens ... which focuses light from the scene to form an image on the 'film' or CCD inside the camera. The longer the focal length of the lens, the larger (nearer) the objects appear to be in the picture. (One radian of angle as seen by the lens ===> One focal length on the film.) On the cameras described in the question, the focal length is given as a range ... "from 18 to 200 mm", and "from 55 to 200 mm". Each of these is a "zoom" lens, whose focal length can be changed over the range, enabling the user to cause objects in the picture to appear somewhat nearer or farther away.
What is the difference between Nikon finepix and Nikon coolpix?
The Finepix range is made by Fuji, not by Nikon.
What is the focal length of normal laboratory concave lens?
A "normal" concave lens might have a focal length anywhere between a few mm and a couple of metres. Outside that range there is nothing particularly abnormal, perhaps just less common.
What is the X in digital camera zooms?
The lens of a digital camera has a certain focal length, expressed in mm. For example, a 50mm lens has a field of view that approximates what we see with our eyes looking straight ahead. A 25mm wide-angle lens has a field of view that approximates what we see with our eyes when we turn our head from side to side. The shorter the focal length of a lens, the wider the field of view. The longer the focal length of a lens, e.g. 300mm, the narrower the field of view. Of course, a narrow field of view is equivalent to zooming in to a far object, like when we look into binoculars. A lens can either have a fixed focal length, e.g. 25mm, 50mm, 300mm, etc. or can have a range of focal lengths, e.g. 25mm - 100mm, 50mm - 300mm, etc. A lens that has a range of focal lengths is called a zoom lens. The zoom factor of the lens is calculated by dividing the maximum focal length by the minimum focal length. That zoom factor is the "X" you are referring to. For example: 1. A 25mm - 100mm lens is a 100/25 = 4x zoom lens. 2. A 50mm - 300mm lens is a 300/50 = 6x zoom lens. 3. A 50mm - 200mm lens is also a 200/50 = 4x zoom lens. 4. A 100mm - 400mm lens is also a 400/100 = 4x zoom lens. So knowing the zoom factor of a lens alone does not tell you what its minimum and maximum focal lengths are. Both examples 1, 3 and 4 above are 4x zoom lenses, but example 1 has a minimum focal length that is a wide-angle and allows us to take wide landscape shots or include all our classmates in one shot. Example 4 has a maximum focal length that is a long telephoto and allows us to bring far object near.
Does the photo in a 75-300 lens make the picture look like at 75 feet as it does at 300 feet?
No. My guess is that you have a zoom lens, whose focal length can be varied over the range of75 to 300 millimeters.The larger the focal length of the lens, the larger (closer) the objects in the picture appear.The handy, easy-to-remember rule that I use is: One focal length on the film (or CCD) depictsone radian in the scene (or sky).
Nikon D40x or Nikon D60 which DSLR is better?
Nikon D60 better dynamic range in the recorded images, plus newer processer.
What is the average range of a Nikon Laser Rangefinder?
Nikon makes many laser rangefinders which measures various distances. Depending on model, the average range distance for a Nikon rangefinder is between 600 and 1200 yards.
How does the focal length of your lens affect your ability to move in close to a subject?
Focal length is directly related to the format of the system and the print size. Since the print size aspect is not markedly significant, I will not delve into it here. For the 35mm format, then, the "normal" lens (whereby the viewfinder image appears to be the same size as the subject) is around 45mm. Shorter focal lengths allow you to move in closer and they provide more depth of field. However, as you approach 28mm, distortion in the form of convergence appears in any plane that is not parallel to the film (or CCD in the case of digital photography). The longer the focal length, the greater is the minimum distance that you must maintain from the subject. Also, the depth of field decreases as does the field of view. The maximum apeture of a long lens also decreases, and in fact, there may be two markings for the maximum apeture if the lens is a zoom of sufficient range. For medium format cameras, the normal lens will be in the range of 80mm (again, depending on the format dimensions), and for 4x5 cameras, the normal lens is around 200mm.
What is the best Nikon zoom camera lens?
There is no single answer to this question unless you say more about what you mean by "best"; do you mean the best possible quality, the lightest, the biggest range, widest or longest or best value? Having said all that(!), I'd suggest the single most useful lens is the 18-200mm - it covers most common application and has a large zoom range.
