2006-09-05 02:35:51 · 9 answers · asked by Anonymous in Consumer Electronics ➔ Cameras
Im looking for a telephoto lens and have a nd was wondering about the mm designations first and second # e.g.70-300mm
2006-09-05 02:41:53 · update #1
so if the first # in a mm designation is higher you can get closer to a subject
e.g 20mm-300mm is better than 70mm - 500mm
2006-09-05 02:57:24 · update #2
You'll see three sets of numbers
* The lens diameter, eg. 77 O.
This is of use if you want to attach filters, so you know what size to get.
* The aperture range, eg. f/3.5-5.6.
Pro lenses generally have a constant f/2.8. The higher these numbers are, the worse the lens will do in low light situations. The first number indicates the best light-sensitivity when you're zoomed all the way out, and the second number is the best light-sensitivity when you're zoomed all the way in.
* The zoom range, eg. 70-200mm. The frst number is the wide-end of the zoom, and the second number is the tele-end of the zoom. Like you say, the lower the first number, the closer you can stand to your subject and still have it fill the picture. The higher the second number, the further away you can stand from your subject and still have it fill the picture.
A 20-300mm lens is really an all-in-one solution. It goes from wide angle to telephoto.
A 70-500mm lens is strictly telephoto, and with 500mm at the long end, a quite powerful one at that. You'll probably be able to zoom in on two or three people across the length of a football field.
2006-09-05 03:36:18 · answer #1 · answered by OMG, I ♥ PONIES!!1 7 · 1⤊ 1⤋
MM stands for millimeter and those numbers show the range of the zoom. 70-300mm means that lens can zoom from a 70mm lens to a 300 mm lens. The higher the top number, the closer you'll be able to get in on your subject.
2006-09-05 02:43:31 · answer #2 · answered by sqclean 1 · 0⤊ 0⤋
the numbering is the aperture and the focal length.
i have a telephotolens.
ranging 70-300 mm.
this lens is used to zoom in. i.e. used for wide spaces,like architechture so that the place looks spaciuos..
4-22 is the aperture.it is used to set how much light has to pass in.it is for perfect exposure.4 means less light 22 means more light.
wide angle lens is the one which has focal length less then 35mm.
mm means milimeters.
f stop is the next stop when you look at the aperture.eg. 4.the next f stop will be 5.6
use a nikon one or sigma lens they are good quiality.(then ull have to have a nikon camera also.
there are three rings one for aperture the next for distance and the third for setting the focus.
hope that helps.
2006-09-05 02:52:38 · answer #3 · answered by bugs bunny 2 · 0⤊ 0⤋
The first number (in the case of the example, the 70) is the collective minimum distance that the lense can be away from the desired focal point (in the case of a digital SLR, the CCD or CMOS chip) in order to focus properly, the second number is the maximum collective allowed distance the lense can be from the desired focal point in order to focus properly only due to size constraints of the lense body. I could go into greater detail, such as the ratios and such also mentioned on the side of the lense, but... yeah. Hope that helps.
2006-09-05 02:55:49 · answer #4 · answered by ? 3 · 1⤊ 0⤋
Which make/model of SLR are you talking about? And do you mean the camera body or through the viewfinder??
2016-03-26 22:53:28 · answer #5 · answered by ? 4 · 0⤊ 0⤋
I believe they are called f-stops. The smaller the number, the less light is let into the lens. Each number represents a different percentage. I forget how it's calculated.
2006-09-05 02:41:14 · answer #6 · answered by rachelframecory 4 · 0⤊ 2⤋
the defenition, the power. or they could just be the serial number u need to be more specific
2006-09-05 02:37:09 · answer #7 · answered by kerr to u 2 · 0⤊ 3⤋
one is e stop and the other is aperture setting
2006-09-05 02:39:11 · answer #8 · answered by carolinatinpan 5 · 1⤊ 2⤋
look at this link: http://en.wikipedia.org/wiki/Angle_of_view
2006-09-05 04:08:45 · answer #9 · answered by Mike 2 · 0⤊ 0⤋