Can someone explain the differences between the 55 300mm ed vr af s dx nikkor zoom lens the 70 300mm ed af s vr nikkor zoom lens and the tamron af 70 300mm Di LD?
This is a Nikon lens that was originally released around 2005. AF-Sstands for Auto Focus-Silent Wave Motor. This means that the lenshas an autofocus motor built into it, so th…e cameras used with itdo not have to have AF motors built into them. "DX" refers to thesize of the camera sensor; the sensor has a 1.5x crop, whichaffects the focal length and the aperture. "18-135mm" refers to therange of focal lengths of the lens. "f/3.5-5.6" refers to theaperture of the lens; as the lens is zoomed in to longer focallengths, the aperture gradually increases from f/3.5 to f/5.6. "ED"refers to the Extra-Low Dispersion elements, which reduce thechromatic aberration of the lens. IF stands for Internal Focus,which means the lens length does not change when focusing. Thefront element of this lens does not rotate when focusing either, sothe orientation of front mounted accessories such as polarizingfilters does not change during focusing. In photography, the "focal length" of a lens is usually stated inmillimeters (mm). The higher the number, the greater themagnification. A "normal" focal length for a 35mm film camera isaround 50mm. A focal length of 18mm is considered "wide angle" and135mm is sometimes referred to as a "portrait" lens. Lenses withhigher numbers (200-1000) may be called "tele-photo". The listingfor a lens as 18-135mm means it is a "zoom" lens. This means thefocal length can be changed by the photographer usually by turninga ring on the body of the lens. As to "f3.5-5.6", in this listing,it is the range of the maximum size of the aperture. The apertureis the opening in the camera that allows light in to take thepicture. The f number -- called the "f-stop" is calculated bydividing the diameter of the aperture opening by the focal lengthof the lens and expressing the answer as a properly reducedfraction (with the top number a 1). The f-stop is the bottom of thefraction. For example: a camera with a 100mm lens that has amaximum aperture of 50mm, or an "f-stop" of 2 (50/100=1/2). On azoom lens, since the focal length changes, but the aperture doesnot, the f-stop will change with the focal length. So, the firstnumber 3.5 means at the lower focal length (18mm) the maximumaperture opening is 1/3.5th of the focal length, or about 5mm. Theother number 5.6 means at the higher focal length (135mm) themaximum aperture opening is 1/5.6th of the focal length, or about24mm.
\nit's an okay lens... depends on your experience as a photographer. It's a good all around "super zoom," but wouldn't be recommended for fast action (highschool to pro leve…l), low light photography or macro. Basically... good as a walk around lens without the need of ultra wide angles or super telephoto shots..
Most lenses with a focal length of more than 200mm are commonly used for shooting sports and wildlife. A long telephoto lens -- in conjunction with a large aperture -- also ha…s the side-effect of producing an exceptionally smooth background blur.
It means the focal length of the lens is infinitely adjustable from 75 to 300 millimeters. And the focal length is important as it represents the field of view. A wide angl…e lens might have a 90 degree field of view which is wider than the average human eye and might help create an artistic effect. Or show more of an interior room. A narrow field of view, like the 300mm setting of the lens described above, has the same affect as a telescope by magnifying distant objects.
In photography we never talk about 3X or 4X magnification and it's a telephoto not a telescopic lens. A lens with a given focal length on a given camera gives a certain view w…hich may be: "normal" = approximately the same perception as the human eye "telephoto" = reaches out and just selects a part of the scene compared with a normal lens. "wideangle" = crams more into the image than a normal view 18mm = moderate wide-angle, useful for buildings & landscapes 28mm = normal, useful for groups and general photography 55mm = moderate telephoto, useful for doing a waist-upwards portrait of a single person sitting 2 metres away If you add a 70-300mm zoom then you add the following focal lengths and all the others in between: 70mm = telephoto, useful for head and shoulders portait 135mm = long telephoto, tight head shot 200mm and upwards = extreme telephoto, useful for wildlife, sports, etc. If you take 300mm and divide by 70mm you get about 4.3X. This isn't a "magnification" factor tho. It only means that at 300mm you are shooting at a focal length that is 4.3 times longer than the shortest focal length (70mm) of that lens. ===== The related link below tells you how to calculate magnification for lenses used in a variety of ways (microscopes, telescopes etc.).
TheAF-S DX Nikkor VR 18-55mm is Nikon's new kit lens, with optical stabilization. See the "Related Links " below the ads for more information.
Which DSLR is better Nikon D40 or D60 Money nor lens being an issue because I own a Nikkor 28mm a Nikkor 52mm and a Telephoto 180-300mm lens occcasionaly I will make poster size prints?
You list the 28mm & 50mm prime lenses. If these are AF lenses, they will only autofocus on the midrange and up Nikon cameras. The Entry level D40, D60, and D5000 cameras do no…t have autofocus motors in body, they rely upon an AF-S lens for autofocus. To replace those lenses with AF-S versions would cost more than a body with a motor. With that said, the very best non-pro Nikon camera that you can buy for less than $1000 is the Nikon D90. This camera will take advantage of the existing lenses that you have. If the D90 is out of price range, go for one of the older ones that have a motor used. These would be the D80, D70. I don't think you would be interested in the D200, D300, D700, D3, or D3x because you were initially looking at the D40 & D60. If you can spend a little more, the sweet spot right now is probably the D700 full frame camera recertified which would provide amazing image quality and could be obtained for about $2000 recertified.
In general, a Polarizer.
A 300mm lens is a telephoto lens, which will magnify the subject. It used to be that a 300mm lens was actually 300mm long, but with the use of compound lenses, they can be sho…rter, but have a "virtual" length of 300mm. On a 35mm camera, about 50mm is the "natural" lens size -- most cameras come with a 50mm lens. You can divide 300mm by 50mm to find out how much it magnifies from the "natural" position. 300/50 = 6, so it will magnify 6 times.
Since we do not know specifically which lenses do you mean (f-stops, brand name), the best advice that we can give you is to try out the lenses and find the one that suits you… better, be it build quality, weight or manipulation. Generally, you get what you pay for, in case the two would be differently priced.
whwt is the importance of numbers on camera lenses, etc 18-105?
AF-s stands for Autofocus-Silent. These lenses from Nikon use an ultrasonic motor (also known as a "Silent Wave Motor" (SWM)) focus quietly and quickly. It is similar to Canon…'s "USM" technology. Introduced in 1996.
There are various places where one could purchase a Sigma 70-300mm lens for a DSLR. For example, websites such as Amazon, SLR Gear and eBay all have them to purchase.