Canon T 70 - Manual (Page 90)

(5) Depth of Fiotd
When yxDur $uOject IS in focus. thc
area (H front of it and behrd it which y/lli also be
in ÍCCUS. This range of sharoness Is calleo depth
of Depth of field 13 g'eaier the shorte' the
fecal length of the ens. For examp'e. a 24 mm
tens p
mm lens.prov'idcO the aperture and shooing dis*
tarce are the same. Depth field ts else greater
ihe longer the shootng distance anrf is generally
greater
m
ihe bacirgro j^d tnan in tno
Icregrojnd
by aroUooItv^o to one
To check the depth of field:
1) First Focus. Then press the shutle* bjtton half­
way and read ihe aperture r^umaer v/hich ao*
pears in Ihe ve'/Zindor. Find the \wo apenure
numbO'S on the deptr>-oMiotd scale on the
*ens v/hich correspond to that number.