| Focal Length of the Lenses
It would be inadvisable for a beginner, who is accustomed to
using only the standard lens, to suddenly purchase an
ultra-wide-angle or ultra-telephoto lens, for the enormous
difference in angle of view would most likely more confuse - The key
to success, in any field, is to advance a step at a time.
Those lenses considered to be ultra-wide-angle are the
17mm,
20mm, and 21mm, we can also include the 15mrn full frame
Fish-eye(180o).
Lenses representing ultra-telephoto are the 300mm, 400mm , 500mm,
and 1000mm focal lengths.
Thus, the clever beginner will select the 24mm, 28mm,
or 35rnm as his/her first wide-angle and the 85mm, 100mm, 135mm or 200mm
as his/her first telephoto lens.
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