The Australian War Memorial Collection. Test site
MT. STROMLO, MAKING OF LENSES FOR MILITARY INSTRUMENTS: LENS ARE MOUNTED ON SPHERICAL BLOCK WITH PITCH AND THEN GROUND & POLISHED ON THIS REVOLVING WHEEL. A REFUGEE FROM ENEMY OCCUPIED COUNTRY IS ENGAGED ON THIS DELICATE OPERATION AND DOES NOT SHOW HIS FACE FOR OBVIOUS REASONS. (NEGATIVE BY E. CRANSTONE).
MT. STROMLO, MAKING OF LENSES FOR MILITARY INSTRUMENTS: SPHERICAL IRON BLOCKS ARE CAREFULLY TURNED TO EXACT MEASUREMENTS FOR USE IN MOUNTING LENS BLANKS FOR GRINDING. TED HOLMES OF OBSERVATORY STAFF A
MT. STROMLO, MAKING OF LENSES FOR MILITARY INSTRUMENTS: MR. ELWYN ENGAGED IN MAKING A GAUGE DESCRIBED IN 5926. (NEGATIVE BY E. CRANSTONE).
MT. STROMLO, MAKING OF LENSES FOR MILITARY INSTRUMENTS: COMPLETED LENS IS FITTED TO PARTICULAR GUN SIGHT. MR. H. BANHAM - SENIOR MECHANIC ON THE PERMANENT OBSERVATORY STAFF FITS THE LENS TO A MILITARY
MT. STROMLO, MAKING OF LENSES FOR MILITARY INSTRUMENTS: AFTER FINAL POLISHING LENS IS TESTED WITH SODIUM MONOCHROMATIC LIGHT. THE LENSES MUST CONFORM TO AN ACCURACY OF ONE TWO MILLIONTH OF AN INCH OVE
MT. STROMLO, MAKING OF LENSES FOR MILITARY INSTRUMENTS: DR. ALLEN CUTTING THE LENS BLANK FROM THE GLASS WITH A BRASS CUTTER WHICH ALTHOUGH COMPARATIVELY SOFT IS USED TO CUT THE GLASS WHICH IS ONE OF T
MT. STROMLO, MAKING OF LENSES FOR MILITARY INSTRUMENTS: DR. WOOLLEY, DIRECTOR OF THE COMMONWEALTH SOLAR OBSERVATORY TAKING A SIGHT THROUGH COMPLETED INSTRUMENT. (NEGATIVE BY E. CRANSTONE).
