Petri? V6 - DEPTH OF FIELD

DEPTH OF FIELD
When the lens is correctly focused on a
subject, you wi ll notice that objects closer
or farther away become less sharp, until
they become almos t completely blurred.
However, you wil l observe that there is a
certain distance between the nearest and
the farthest away subjects, which still
appear sharp. This zone of sharpness is
called the " DEPTH OF FIELD " .
In
order to check the depth of field with
the exposure setting in use, observe the
figures engraved on the Depth of Field
Indicator on the Lens. These figures are
aperture values and are indicated by black
lines spreading out on either side of the
red diamond mark at their centre. The
black lines point to the distance scale and
indicate the depth of field at different
distances according to the aperture used.
For example : When f/ 16 is selected and
the focusing distance is 6 feet , the depth
of field is approximateJy 4.6 feet to 10 feet.
See the illustration.
16
~ .
feet
2
2.5
3
4
5
6
8
12
30
00
DEPTH OF FIELD TABLE
( PETRI 55mm f: 1.8 & f : 2 )
1.6 (2)
2.8 4 5.6 8
11
1. 98
1. 97 1. 96 1. 9< 1. 92
1. 90
1. 86
2.02 2.02 2.03 2.05 2.07 2. 11 2.15
2. <6 2. 45 2.4 4
2.·n
2.38 2.3 4 2.29
2.54 2.5 4
2.56 2.58
2.62
2.67
2.74
2.95
2.9 4 2.91 2.88
2.83
2.77
2.70
3.05 3.06 3.08 3.12
3.18
3 .26 3.36
3.90
3.89 3.85 3.79
3.7 1
3.
60 3. 48
< .10
<. II <.16 < .23
< .33
4.49 4.69
<. 851 < .83
4 .76 <. 67 4. 55 4. 38 4.21
5.16 5. 17 5.25 5.37 5.53 5.80 6. 14
5.78
5.75 5 .66 5.53
5.36
5.13 4.89
6.23
6.26 6.37 6.55
6. ;9
7.21 7.74
7.61
7.57
7.41 7. 18 6.91 6.52
6.14
8. 43 8. 47
8.68 9.0 1 9. <8 10.33
11. 47
11.15
11. 05
10. 71 10.25 9.68 8.9 4 8.23
13.00 1
3. II 13.62 14 .<7 15.76 1 8.2 1 22.11
25.12 24.67
23.04
ZO.49 1 8.7 1 16 . 11 13.92
37.19 38.21 42.92 55.90
75. 47
215.70
c·
154 .9 '139.31
99.54 64.69 49.76 3 4.8 3 25.99
c.,
In
(,\ ..
'-'~'
.0 U
16
1. 81
2.23
2.20
2.88
2.58
3.58
3.27
5.13
3.91
6.92
4.49
9.02
5.51
14 .58
7.13
37.82
11. 01
C()
17.41
co