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Originally Posted by Edensmimi I own a Nikon D40X and was wondering if someone could educate me I have a Nikon 55-200mm lens. What do the numbers actually mean? I am new to the SLR scene and want to learn all I can. If anyone knows a website that can better help me please let me know. Thank you in advance for your help |
As Keepitsimple mentions, Focal length are in ref to 35 mm equivalent. Now the vision that you see with the naked eye is equivalent to 50mm focal length in a 35mm camera. So as the focal length goes below 50mm it becomes wide angled and higher the focal length makes it telephoto (gives magnified image) If it has a variable focal length it is a telezoom lens as you have.
Now with the D40x things do not end here. It takes photos in Nikon FX format. I suppose your lens also mentions 55-200FX. In other words the imaging sensor of D40x is smaller than a 35mm film, or full format Digital SLR (DX format in Nikon). Hence there is a conversion factor of around 1.6 to be multiplied to you focal lengths. Hence your 35mm equivalent focal length will be 88-320mm (55x1.6 & 200x1.6). So any pictures you take will always be magnified/closer than normal vision. You need a 18-55mm FX lens giving you a effective focal length of 28-88mm for your routine use. Whew!
It is a bit technical but if you have any more queries please feel free.
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