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Photography Question 
Paul F. Cornejo

What Does 10-1000mm Mean?

I have a Zenith camera with 10-1000mm lens. What does 10-1000mm mean?

I also got a 10-300mm lens. Please shed light on the mm's so I can utilize my camera properly.

Thank you. cpfc

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Jon Close
BetterPhoto Member Since: 5/18/2000
  The range in mm (millimeters) is the focal length range of the lens. Technically, the focal length is the distance between the film (or image sensor) and the optical center of the lens when the lens is focused on infinity.

The focal length determines the width or angle of the field of view of the image. A short focal length gives a wider field of view than does a long focal length.

For 35mm film cameras, 10mm would correspond to about 180 degree view, while 1000mm would fill the image with just a very narrow 2.5 degree view. For example, if you're taking a picture of 20 people standing shoulder to shoulder, you can get them all in the picture with a short focal length lens. With a long focal length you would fill the frame with just one person's face.

10mm-1000mm is a very extreme range for a lens, is this a video or digital camera? Digital and video cameras have a much smaller image sensor than a 35mm frame of film, so 10mm-1000mm would result in a much smaller field of view than for 35mm.

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Paul F. Cornejo   Dear Jon (9/15 response)

Thanks for the insight! I am using the 10-1000mm Russian lens for my Zenit Camera, just a plain camera.

If I use the lens to take long range pictures, such as the moon or nature sightseeing, would it be to my advantage?

Thank you once more. Paul

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Jon Close
BetterPhoto Member Since: 5/18/2000
  Zenit is (as you said) just a plain Russian-made 35mm SLR camera. Your original message said "Zenith," that is why I thought you might be referring to a digital camera. The lens is without doubt NOT 10mm-1000mm zoom as this is not practical in a 35mm camera. It might by 1000mm f/10. Maybe you could copy exactly what the lens has written around it's front element?

Because the Zenit is a single lens reflex camera, I'm confused by your question about what type of picture-taking it is good for. The view you get through the viewfinder is how the picture will look.

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