| Praktica BX 20S green |
| Producer data |
| Producer |
Jos. Schneider GmbH, since 1998 Pentacon GmbH |
responsible constructor |
unknown |
| production period |
unknown |
no of produced cameras |
approx. 155 |
| Technical properties of the camera |
| shutter type |
steplessly working electronically controlled vertical-run
two-magnet metal-blade focal plane shutter |
exposure time
(possible settings) |
B, steplessly automatic speeds between 40 sec and
1/1000; manually precise speeds of 1/1, 1/2, 1/4, 1/8, 1/15, 1/30, 1/60, 1/125, 1/250,1/500, 1/1000; mechanical range 1/100 sec |
| view finder |
fixed eye-level view finder (Pentaprism, field of view: 95%)
with field lens with triple rangefinder wedge, truncated microprism screen, groundglass field,
16 red LEDs for shutter speed signalling (right side of the
view-finder image) changes their brightness with brightness of the image, on
the left side one LED for flash ready signal, "cocked/no cocked"
signal (orange colour of the aperture setting reflection window) |
mirror |
instant-return mirror |
| film transport / frame counter |
single stroke 125° wind-on quick-release lever with 25° stand off position, accepts
BX-motor winder, folding crank rewind knob, auto-zeroing frame counter |
lens mount |
Praktica-B-mount with EDC (electronic diaphragm control) |
| self timer |
mechanically, approx. 10 sec delay,
serves also as stop-down lever for depth-of-field checking |
battery |
VARTA V28 PX (4xLR44) |
| metering system |
TTL-metering (25 to 5000 ASA
for automatic film speed entry via DX cartridges, 25 to 400ASA for manual film
speed entry) using electronic diaphragm control (EDC) for measurement with open aperture using a
Silicon photo-sensor, auto exposure compensation, TTL-flash system
(!), automatic exposure system with memory key, battery check facilities |
flash system |
X-synchronisation (1/100), accessory shoe at the top of the
pentaprism |
| flash indication |
yes |
aperture reflection into view finder |
yes |
| general comments |
black/green casing |
| collection data |
| Hummel-No |
243* |
Kadlubek-No. |
KWE 4030 |
| body no. |
4126807 |
lens no. |
607638 |
| lens type |
Prakticar Auto Zoom 1:4.5
70-210mm Macro MC |
purchase price |
550€ |
| advertising |
|
manual |
|
 
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