Visual exposure meter with blue fields for matching surrounded by diffused, marginal field unaffected by adjustment of meter. Calibrated H&D 12-2000. f/1.4-64 1/5000 sec to 5 hours. Designed by Dr. Schlichter. C.1929 Lios aktinometer
Extinction type exposure meter. Reading made on small blue circle in larger field of ground glass, reducing effect of accomodation etc. Telescope type, tube marked with scale: H & D speeds 12-2000. Lens apertures f/1.4/64. Shutter speeds 1/5000 sec - 5 hours. Dr. Schlichter. Lios-Actinometer exposure meter (model photo)
Eios aktinometer made by Dr. Schlicter, Germany. Extinction type photometer, telescope type.; comparative type with sector wheel adjustment; fields set in diffuser screen. Calibrated H and D 12-2000. (M388) Eios aktinometer extinction meter