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Praktica BX20H
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Praktica BX20H - part of BX20 (H-V)-system
Producer data
Producer Jos. Schneider GmbH responsible constructor unknown
production period 1993 no of produced cameras approx. 150 systems
Technical properties of the camera
shutter type steplessly working electronically controlled vertical-run two-magnet metal-blade focal plane shutter exposure time
(possible settings)
view finder modified fixed eye-level view finder (Pentaprism, field of view: 95%) with field lens with triple rangefinder wedge, truncated microprism screen, ground glass field, 16 multicolored LEDs for shutter speed signaling (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 color of the aperture setting reflection window)

limited field for reduced negative size

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 none battery works only using special power supply unit
metering system unknown - optically identical with standard BX 20S

(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-synchronization (1/100), accessory shoe at the top of the pentaprism
flash indication yes aperture reflection into view finder yes
general comments
bulletpossibly precursor of BXEDH system
bulletpart of special system for police records department with a negative size of 18x24 mm for Bertillon photography for mug shots
bulletsystems consists of two cameras:
bulletBXEDH - that means ED=police records department (Erkennunsdienst) and H=half format (Halbformat) with 24x18mm negative format
bulletBXEDV - that means ED=police records department (Erkennunsdienst) and V=full format (Vollformat) with 24x36mm negative format
bulletboth cameras were integrated in the LIBAS (Lichtbildaufnahmesystem=slide photography system) developed from Dunco inc. and criminal investigation departement as well Jos. Schneider inc, Feinwerktechnik Dresden
collection data
Hummel-No 245a* Kadlubek-No. none
body no. 3241306 lens no. 8087001
lens type Pentacon Prakticar 1:1.8 f=50mm MC purchase price 210€



under construction

BXEDH pictures BXEDV picture






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Stand: 10. April 2010