focus range of 300 mm lens?

Question

if i am having 300mm tele lens, what will be the maximim range of it? can i get the pic of a bird flying 500mtrs above?

whatz the general mathematical formula?

Answer 1

You're gonna want at least a 400 mm lens on a digital SLR if it has a lens factor of 1.5 or a 600 mm lens on a 35 mm film camera. At least. Not cheap.

Here's a good page about bird photography. If you go on down the page, Ken discusses lens selection.

http://www.kenrockwell.com/tech/birds.htm

Answer 2

I don't know what you mean. There's no formula for anything like this. Depending on the format of your camera, a 300 mm is a medium length telephoto and, like any lens, you can photograph anything with it. If you want to know whether you will get a reasonably sized image of a bird 500 metres away, the simple answer is no. At 500 metres, there's hardly any lens that will give you a nicely filled frame of a bird. For bird photography, think more in terms of 20 metres or less. For that your 300 mm will be fine. If this doesn't help, please ask the question again and give more information. For example, what's your camera format? Remember, a normal 300 mm for a 35 mm SLR will give you an effective 450 mm with the smaller format of a digital SLR.

Answer 3

This might help.
The Zoom-Nikkor lens offers 70-300mm (4.3x) zoom performance, and is suitable for various telephoto shooting opportunities, particularly in sports, nature and wildlife photography. When used with a Nikon DX format digital SLR, the picture angle is equivalent to what would be experienced with a 105-450mm lens on a 35mm.

Answer 4

about the equ of a 10x optical zoom