Home Movies and Home Talkies (Jun 1933-May 1934)

HOME MOVIES & HOME TALKIES 411 YOUR CINE QUERIES ANSWERED! Address your query to : The Service Department, HOME MOVIES, George Newnes, Ltd., 8-11 Southampton St, Strand, W.C.2, endosinsg the free Query Coupon printed in this issue. A selection from queries and answers of general interest zvillbe printed each month on this page. All others will be replied to by post. SPECIAL NOTE.— Owing to the rapid growth of the circulation of " HOME MOVIES "and the large number of queries now sent in, readers are asked to limit the number of questions in one letter, so as to enable an early reply to be sent. D. T. L., Cardm : The U.o.F. Him is a very distinct improvement on the old Pathe ortho .stock. Messrs. Pathe will develop your reversal film as a ne;;ative if 3'ou ask them to do so — -you can then have several j)ositive prints made. 0. H., Glasgow : The sensitivity to colour of the various photo-electric exposure meters now on the market (Weston, Electrophot, Metrophot, Ombrux, Photoskop, etc.) very closely resembles that of the human eye — that is to say, the maximum sensitivity comes in the yellow region. The sensitivity curve of modern panchromatic emulsion differs from that of the eye, but not sufficiently to make any error of consequence in the readings on these meters. Orthochromatic film, however, has its maximum sensitivity in the blue region and the curve is quite different from that of the photo-electric exposure meter. In the majority of cases, however, the readings of the meters aie reliable with ortho films, although if the light tends to be rather yellow a considerable error may be produced. Seeing that most amateurs using 16-mm. films use panchromatic film exclusively no trouble is generally experienced ; 9|-mm. users of orthochromatic stock are, however, in the majority, and if iisinir these ph<)t(i.,.|erf rir meters 'in lati aftrriio,,ii or uhcii llir li.jlil C. C. R., Birkenhead : The finest grain sub-standard cine film on the market at the present time is that used in the Cine-KodakEight. It cannot be used in 16-mm. cameras owing to the different size of perforation, although it is 16-mm. in width before being split. Reversal films have on the whole a finer grain than negativepositive films for reasons which are well known but cannot be explained in the short space available here. The latest negativepositive films, however, give excellent results, and many users think that the slightly larger grain of the pictures made on this film is more than compensated for by the advantage of being able to have a new copy whenever you want and of being able to edit the film in the negative, thus avoiding splices in the film projected. F. R., Ashton-under-Lyne : See previous answer. The size of the grain in the finished print is partly dependent upon the processing, and bad processing can give a coarse grain effect in films which otherwise might be a fairly fine grained. Under-exposed films which have been forced to get out the image usually show coarse grain. Read the article by Dr. Lummerzhein in the October issue of Home Movies and Home Talkies. It covers the questions you ask in a very fine manner. tends to be yellow they should guard against under-exposure on ortho film by doubling the exposure given. C. 0. P., Henley, writes : " I have recently seen some cruising films in which the white clouds show up beautifully against the blue sky. I have not succeeded in getting such results with my own films and should like to know what filter or filters I must use to make my pictures like this." Answer. — It is a very prevalent fallacy that filters must be used in order to get cloud effects. While filters can be used in this way they are by no means essential, and in our experience the modern panchromatic film, and particularly the Novopan and Superpan varieties (which are not oversensitive to blue), when correctly exposed give splendid cloud effects without filters. Any of the good photo-electric exposure meters enable this to be done in a wide variety of conditions. In point of fact many amateurs tend to over-expose their films and by using filters cut down the exposure to a more suitable figure. Thus it is often not so much the filter correction which brings out the cloud forms as the reduction of the exposure which would otherwise be too great. If, however, you want to experiment, and as you have a Cine-Kodak, you can obtain from Messrs. Kodak, Ltd., special filters of the " C.-K." type designed to give a still further repression of blue with Kodak films. HOME MOVIES." March, 1934 QUERY COUPON THE ONLY DEALERS IN GT. BRITAIN The ONLY 9.5 mm. Cine Camera litted with : Adjustable Film Speeds, 16-32 pictiues per second (normal and semi-slow motion). Hand crank for titles and trick lilms. Takes 30 ft. films in standard raotocamera chargers. F/2.8 Steinheil Cassar (twice as fast as F/3.5) Price £12. 10. only The ONLY 9.5 mm. Cine Camera fitted with : Tiurret head for 3 lenses, all of wliich are interchangeable. Keal slow motion with adjustable film speeds, 8-64 pictures per second. Hand crank' for titles" and trick films. View ffinder fitted with parallax movement for close-ups . Film capacitv 100 ft. or .')0 ft. (dayliglit loading films). Price £31 (camera only) hn^xes U, clioirc. Who actually have IN STOCK a Full Range of CAMERAS The ONLY 9.5 mm. Camera littod with : I iiterchangeable Lenses. Adjustable film speeds (8-24 pictures per second). Hand crank for titles and trick films. Film capacity 50 It. (daylight loading films). Price £22 Fitted with F/2.8 Cassar. Our Part Exchange allowances are definitely the highest. Fill in the form below and see for yourself. POST THIS TO-DAY" Please send descriptive catalogue of Cii and quote without any obligation on HIGHEST ALLOWANCE on my apparatus. My apparatus is (make and model) Age and condition Extras (if any) Name 1 & CAMERA fo GRAMOPHONE \j Address 320 Vauxhall Bridge Road, VICTORIA, S.W.I Victoria Station. (Monday to Saturday).