lenses for K100d pentax

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Sean Logie
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Afternoon, i'm totally new to the SLR world , so i'm after some advise on what lens(ie) zoom or telephoto what's the difference between the two?.. for fast movement (ie) motorsport or animals,birds even.. prob looking at the 55-200mm range or more cheers.. regards Sean:shrug:
 
Zoom and Telephoto = two different words for the same thing.

You can buy Pentax or Sigma or Tamron lenses to fit but your budget really determines which you can go for.
 
Thanks Steep for your time and comments.. budget is an issue
 
Sigma 70-300mm f/4-5.6 APO DG Macro is good quality for reasonable cost, about £180 on the High Street, less online.
 
A zoom lenses is one which can change focal lengths, as opposed to a prime which has a fixed focal length.

A telephoto is taken to be a lens with a long focal length and can be either a zoom or a prime.

Generally anything from 70mm onwards on a 35mm camera would be called a telephoto, which would make a 50mm 'normal' lens a short telephoto on most DSLRs, though some people only using the term for lenses with longer lengths such as 200mm and beyond.

Technically though a telephoto lens is one that has been constructed in a particular way to allow it to have a shorter size than its effective focal length, usually making it about half as long as it would otherwise need to be.

Michael.
 
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