how much does a tele lense improve the zoom of a digital camera, it multiplies existing zoom or adds to it.?
Posted by adminJul 11
i have a sony dsc h9 digital camera with 15x optical zoom. sony sells an accessory by name tele lens with 1.5x. If i attach the same to my digi cam, it make my digital cam zoom to 16.5x or 22.5x. Please clarify. Does it affect the clarity of the images adversely???
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2 comments
Comment by Modulus on July 11, 2010 at 1:58 pm
It would make it 22.5x, technically. It takes the focal length of the lens and multiplies it by 1.5, or in other words, 50% more focal length is achieved.
Although those extender lenses, especially the Sony ones, are made with somewhat higher-quality glass, some image degradation can be expected because you are placing more glass, and thus more opportunities to soften/distort the image, in front of the lens. I can’t comment as to how much to expect, but I would expect some image degradation.
Comment by andyg77 on July 11, 2010 at 1:58 pm
I’m pretty sure it multiplies as that is how my telescope and microscopes worked.