what is the equivilent of an 12optical zoom digital camera in slr lens terms,?

Question

i am thinking of buying an slr camera and i am not familar with the slr lens types, is there any examples in optical zoom terms??thanks

Answer 1

Your eye sees at about 50mm. a 2x zoom would be 100mm a 12x would be a 600. Hope this helps.

Answer 2

Optical zoom factor is a relative term. The manufacturer is telling you the range from the widest angle to the narrowest (highest zoom) angle. It might be 5 degrees to 60 degrees or 6 degrees to 72 degrees, or any other number.
Nikon, Tamron, Sigma and others all make 18-200mm lenses, which are in the 11-point-something range. If you're looking at Nikon, the Nikkor lens sells for about twice as much as the Tamron and Sigma lenses, but is better quality and has vibration reduction.

Answer 3

in slr world there's lenses even without zoom.....each lens has it's features and field to use in((portrait ,sports,wildlife,macro,landscapes....etc))
there's numbers on the lens which represent the focal length...with these numbers u can know what the lens is used for ... i'll give u some examples:
1.18-55mm....it's a wide angle zoom lens and also great for macro usage ...and if u insist to know it's zoom just do the following((55/18=3.05....so it's zoom is approximatly 3x)).
2.28-200mm....it's a wide angle to telephoto zoom lens and it's zoom ((200/28=7.1x)).
3.50mm...it's a macro lens with no zoom at all ((just one focal length.
4.500mm it's a telephoto lens also with no zoom.

there r many many other examples but the idea that u have to understand .....the SLRs lenses r not comparable to each other by the zoom and can not be compared to other compact digicams ....coz each lens have it's unique features that r used for a certain situation and can't be used for another....if u r planning to have an SLR so u should buy at least 2 extra lenses with different focal lengths to be ready about 90% for every view u like to shot.....good luck.

Answer 4

The information of the zoom range should be supplied in the specification of the camera you are going to buy.

What I can explain is how the 12x come from. It's taken from the longest lens distance divided by the nearest. in a 35mm SLR it probably from 30mm-360mm or 24mm-288mm or even 20mm-240mm. that's the equivalent. But if you buy compact the lens will be shorter and smaller as the Capture media (CCD/CMOS) also smaller.

Answer 5

hi,

i understand where you are getting at. i had similar queries when i switched from a digital compact to a digital slr recently.

i may be wrong but this is how i derive the zoom factor of the lens in a slr. for example, my nikkor lens is 18-200mm, so the optical zoom factor is 200/18 = 11.1x, where 18mm is the nearest focal length, and 200mm is the furthest.

hope this helps, but pardon me if i am wrong.

Answer 6

Its about a range of 28-300 , but you really have to get away from thinking 10X 12X etc , as most DSLRs have a crop factor of 1.6 so a 70-300 becomes a 110mm -460mm

Answer 7

If your question is in terms of 35MM; according to my Sony spec sheet a 12X= 36-432 MM when converted to 35mm.My Sony is not a DSLR.

Answer 8

There is none

Eqivalent in 35mm terms would be a 30mm to 360mm zoom

Answer 9

well : according to a "Certain Digital Cameras it would be
eather Olympus or Kodak advance serries " where as you'd can
compare with Sir Cameras! see these
below
http://www.olympus.digitalcamera.com
http://www.kodak.digitalcamera.com
http://www.sir.digitalcameras.com
Good Luck