Nikon Digital Camera Lenses
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FAQ
- SLR camera lens life how to count how to identify the life of second-hand lens!
- ens, most of the life without a say, second-hand lens mainly look color The first is the appearance, see whether the bumps, etc., aperture leaf with or without oil And then the lens, 1 to see whether the scratches, 2 to see the gray situation, the lens is usually into the gray, mainly to see if the dust is too large that will affect the imaging, 3 to see whether the film is stripping, Fog.
- SLR camera lens 14mm, 16mm, 18mm, the three focal length of the viewing angle were how many degrees
- Classmates, this must be multiplied by the coefficient. Multiplied by 1.5 after the focal length unchanged, but the angle will be reduced. On 135 film 14MM is 114 ° 20MM is 94 °. The angle of view of the lens (diagonal viewing angle) refers to the angle between the ends of the diagonal of the image focal plane (image sensor) to the lens main point (second main point) The imaging range of the subject on the square focal plane. Therefore, when the size of the image focal plane as a factor of the viewing angle changes, the viewing angle will also change. As shown in the figure, when the image sensor becomes smaller, the viewing angle also becomes smaller. Although the viewing angle has changed, the distance from the main point of the lens to the square focal plane has not changed,
- SLR camera lens thickness, what is the difference!
- he lens thickness is related to the following aspects, but not limited to the following aspects, only pick up my moment to think about it: 1, aperture size: aperture F value is the lens focal length and aperture diameter ratio, the longer the focal length, aperture F value is smaller, the larger the aperture diameter, since the aperture diameter is clear that the lens is fine. So the general telephoto than the standard focal lengths thick, large aperture lens than the small aperture lens rough. (Can ask this question you can also estimate that the food may be, focal length, aperture and so on the basic terms are not clear, to check their own)
- Camera lens glass broke, the camera's lid can not get down
- specific method: First, with a tilted nose clamp carefully cut off the lens cover, the action should be light, do not vibrate the lens, so as not to UV lens fragments on the lens harm.
- SLR camera lens specifications how to see
- Part II: lens focal length 55-250mm Indicates the value of the lens focal length. The fixed focus lens is represented by a single numerical value, and the zoom lens marks the values ??at both ends of the focal length range. 55-250mm that this is a zoom lens, the minimum focal length of 55mm and the maximum focal length of 250mm direct zoom
- SLR camera lens is a unified standard?
- Not common! Canon, Nikon, Sony, Pentax four manufacturers bayonet is clearly not common. Even if Canon EF and EF-S are not common, EF can be used in full frame and APS-C frame machine, and EF-S can only be used in APS-C frame machine
- The camera lens focal length and aperture is how to adjust
- The aperture range of the 1,18 end is 3.5-22, and this range is adjusted for you. 55 side is 5.6-32 this range of casual adjustment. Usually 1/3-level aperture for a file. 2, yes, you understand right, this lens will be the largest aperture with the focal length of the longer and reduced.
- What are the A and M on the SLR camera lens?
- 2, A: Aperture priority exposure mode. Set an aperture, the camera according to the light automatically give a suitable exposure time.
