Zoom creep

Zoom creep is a phenomenon in zoom lenses where the angle of view of the lens changes when gravity is allowed to freely act on it.[1] If the lens has a zoom ring, holding it when the lens is held upwards or downwards will prevent this change. In lenses with push-pull zoom, creep is prevented by holding the extending part of the lens. Some lenses, such as the Tamron SP AF 17-50mm f/2.8 XR Di II LD Aspherical [IF][2] and Canon EF-S 18-135mm f/3.5-5.6 IS STM,[3] have a zoom lock to stop the effect.

References

  1. ↑ https://support.nikonusa.com/app/answers/detail/a_id/13918/~/what-is-zoom-creep%3F
  2. ↑ http://www.tamron.eu/lenses/sp-af-17-50mm-f28-xr-di-ii-ld-aspherical-if/
  3. ↑ http://www.usa.canon.com/cusa/consumer/products/cameras/ef_lens_lineup/ef_s_18_135mm_f_3_5_5_6_is_stm
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