British Kinematography (1950)

96 BRITISH KINEMATOGRAPHY Vol. 17, NO. 3 with the reproduction range of reversal colour materials, this is quite definitely not the case where cross or back lighting is employed. Thus in the latter case particularly, the total subject range far exceeds that of the film and the exposure must necessarily be very much of a compromise. " What actually happens is that the first 1 normal to source ' reading on the one hand correctly reproduces the fringe headlights of such subjects, but under-exposes the darker shadows whereas, on the other hand, the ' camera direction ' reading correctly exposes the darker shadows facing the camera, but burns out the highlights. Thus any Duplex ' in between ' compromise obviously falls in between the above extremes, and the particular ' geometric mean ' suggested by us for normal use actually splits the errors equally on each side, thus giving, in our view, the best compromise for the general case. " It is admitted that a slight difficulty arises with 90° lighting when taking the camera direction reading, but even this rarely applying condition is easily overcome by swinging the meter a few degrees either way into and out of the sun and taking the mean of the indication as the ' camera direction ' reading. The ' normal to source ' reading followed by the ' mid point ' compromise is then applied, as in the case of any other lighting condition. There are, of course, also other exceptions covering ' all light ' and ' all dark ' subjects for which corrections need applying and which can hardly be avoided irrespective of the method of approach." Small announcements will be accepted from Members and Associates. Rate, 4d. per word, plus 2s. for Box No. if required (except for Situations Wanted). Trade advertisements, other than Situations Vacant, not accepted. CHARLES H. CHAMPION, M.I.Mech.E., A.M.I.E.E., F.B.K.S., F.R.P.S. Died August 30, 1950 Mr. Champion, who died whilst on holiday in Belgium, was chairman of Charles H. Champion & Co. Ltd., and The Ship Carbon Co. of Great Britain Ltd., besides being a member of many learned Societies and one of the original Fellows of the British Kinematograph Society. He founded Charles H. Champion & Co. Ltd., in 1922 and introduced Ship Carbons to this market. Subsequently, in 1927, he founded the Ship Carbon Co., and established a producing unit for lighting carbons in this country. He devoted his entire efforts to building up the lighting carbon industry here, and Ship Carbons are a great monument to all that he did. During his career, Mr. Champion became very keen on better projection, and supported the projectionists in their efforts to obtain better picture presentation. Many members of the late Guild of Projectionists will well remember his efforts in this direction. He also was very interested in all the Society's work, being a member of the Council for many years, and lent his influence towards making the Theatre Division of the Society a success. Mr. Champion was courteous and charming in his manner, and the industry has lost a man it could ill afford to lose. H.C.S. NOTICE It is desired to get into touch with the following members. Please contact the Secretary, 117 Piccadilly, W.l. E. M. Askew. P.N. Bishop. A. E. Davis. M. P. Rowland. J. W. S. M. Sudds. LIBRARY The Librarian will be pleased to send books by post on receipt of a request. Members are urged to keep their fellow members conversant with their activities through the medium of British Kinematography. BRITISH KINEMATOGRAPHY Volumes 16 and 17, bound in one volume, blue cloth with gilt lettering, for £2 : 12 : 6 A limited number of bound volumes for the current year will be available. Order now for delivery in January A Christmas gift which would be appreciated by any technician or student