Praktica LTL Instructions for Use
– 8 –
Not to be used
To be used
Working range of the automatic exposure control system
The following table shows within which range of shutter speeds the automatic system works in con-
nection with the various film speed settings. Outside of this range the metering system is disconnected.
The meter needle then moves to its resting position below the circular mark.
Speed of film DIN
ASA
Exposure speed
12
00
12
1 sec. to 1/125 sec.
15
00
25
1 sec. to 1/250 sec.
18
00
50
1 sec. to 1/500 sec.
21
0
100
1 sec. to 1/1000 sec.
24
0
200
1/2 sec. to 1/1000 sec.
27
0
400
1/4 sec. to 1/1000 sec.
30
0
800
1/8 sec. to 1/1000 sec.
33
1600
1/15 sec. to 1/1000 sec.
I. Focusing
The prism viewfinder of the PRAKTICA LTL is fitted with a Fresnel lens, in the centre of which
are the two focusing systems:
– the microprism screen right in the
middle and
– the circular groundglass area sur-
rounding it.
To achieve utmost definition, focu-
sing is preferably performed with the
lens at full aperture. In lenses with
automatic pressure diaphragm (APD)
this takes place in any case if the
metering key is not being depressed.
If lenses without automatic diaph-
ragm are being employed, focusing is
performed, as already stated in Section
(H), with the lens at full aperture
(smallest diaphragm numeral)
before
the meter reading is taken.
