Amateur Photographer & Cinematographer (1936)

July 15th, 1936 lH( AMATEUR PHOTOGRAPHER 6 CIUEMATOGRAPHER o Exhibitions and Competitions FUTURE. The name and address in brackets indicates to whom to apply for further particulars. The Amateur Photographer Monthly Competitions for Beginners, Intermediate and Advanced Workers. — Entries, July 31. Rules in the issue of June 24. VVallace Heaton “ 35-mm. Film Competition.” Cash prizes every week. Open to readers of The Amateur Photographer only. Full particulars in advertisement page in this issue. XVme Salon International de Photographie de Bruxelles. — Open, May-October. (M. Maurice Broquet, Secretaire du Salon, Rue du Sceptre, 77, Brussels.) Salon International de Fc^ografica de Madrid. (Sehor Secretario de la Sociedad Fotografica de Madrid, Calie del Principe, 16, Madrid.) Folkestone C.C. Competition in connection with Folkestone Floral Festival. — Open, July 8-18. Cash prizes. Entry forms available from photographic traders in Folkestone. (E. F. Davidson, 44, Wear Bay Crescent, Folkestone.) The Listener. Cash prizes for photographs under general title ” Conversation Pieces.” — Open, July 8August 25. Entries, Monday morning of each week. First selection in The Listener of July 22. (Editor, The Listener, Broadcasting House, London, W.r.) Western Salon of Photography. — Open, July 11-18. (Rev. R. J. Attfield, Hennock Vicarage, Newton Abbot, Devon.) Chicago International Salon. — Open, July 23-Octo* her 4. (Alex. J. Krupy, Chicago C.C., 137, North Wabash Avenue, Chicago, Ill.) I International Kunstphotographische Austellung in Karlsbad.— Open, July i8-August 9. (Hugo tleyer, Schulgass, 26, Karlsbad.) Thirteenth Midland Salon of Photography.— Open, June 2o-July 18. (Geo. T. Boulton, The Art Gallery, Pall Mall', Hanley, Stoke-on-Trent, Staffs.) XXXIe Salon International D'Arte Photographique de Paris. — Open, October 3-18. (M. E. Cousin, Secretaire de la Soci^t^ Fran(;aise de Photographique, 51, Rue de Clichy. Paris (qe).) Radio Photo-Club de Spa. IVme Salon Interna-* tional de Photographic.— Open, August 9-30. (M. Rend Chalsdche, Avenue Marie-Therdse, 13, Spa, Belgium.) I Salon Intemacional de Fotografia de San Sebastian. — Open, August 5-20. (Sr. Secretario General, Salon Intemacional de Fotografia de San Sebastian, Calie San Marcial, 26, San Sebastian, Spain.) Forty-fifth Toronto Salon of Photography. — Entries, July 25 ; open, August 28-September 12. (W. H. Hammond, Secretary, Toronto Salon of Photography, 2, Gould Street, Toronto, Canada.) Museum and Public Library, Maidstone. Exhibition of Nature Photography. — August 15-29, (C. E. Fisher, Museum and Public Library, Maidstone.) Tweede ” Focus ” Fotosalon. — Entries, August 10 ; open, September 12-27. (Focus, Ltd., Fotosalon, Bloemendaal, The Netherlands.) South African International Salon. — Entries, August 14 ; open, October. (Hon. Secretary, Johannesburg P.S., P.O. Box 7024, Johannesburg, South Africa.) Royal Photographic Society Annual Exhibition. — Entries, August 14 ; foreign entries, July 31 ; open, September 12-October 10. (Secretary, R.P.S., 35, Russell Square, London, W.C.) Buffalo C.C. Fourteenth Annual Salon of Photo¬ graphy. — Entries, August 15 ; open, September 6-27. (H. W. Schonewolf, 528, Elmwood Avenue, Buffalo, N.V., U.S.A.) Morecambe, Heysham and D.P.S. — Entries, August 19 ; open, September 9-16. (James F. Levisohn, B.Sc., 5, Douglas Drive, Heysham, Lancs.) Fotoclub Zagreb. Fourth International Salon of Photography. — Entries, August 20 ; open, October. (Fotoclub Zagreb, Masarykova II, Zagreb, Yugoslavia.) London Salon of Photography. — Entries, September 2 ; open, September 12-October 10. (Hon. Secretary, London Salon of Photography, 5a, Pall Mall East, London, S.W.i.) Lincoln Camera Club. — Entries, September 5 ; open, October 15-November 12. (Miss E. Redfern, 146, Burton Road, Lincoln.) XII Salon International de Fotografica, Zaragoza, Spain. — Entries before September 10 ; open, October. (Secretary, Sociedad Fotografica de Zaragoza, Plaza de Sas, 7, Zaragoza, Spain.) Third Canadian International Salon of Photographic Art. — Entries, September 10 ; open, October 23November 15. (Exhibition Secretary, Canadian In¬ ternational Salon of Photographic Art, National Gallery of Canada, Ottawa, Canada.) Windlesham C.C. — Entries, September 10 ; open, September 25-26. Classes for members (Beginners, Advanced, Professional, also Open Class). (J. C. Hayward, Hallgrove, Bagshot, Surrey.) IV’ International Hungarian Exhibition. — Entries, September 15 ; open, October 24-November 9. (Secretary, Magyar Amatorfenykepezok, Orsz. Szovetsege, Budapest VII, Erzsebet-kdrut, 9, Hungary.) Rotherham P.S. Forty-seventh Annual Inter¬ national Exhibition. — Entries, September 21 ; open, October 14-17. (E. George Alderman, Ruardean, Newton Street, Rotherham.) Service Co. (London), Ltd., Happy Camp Snaps Competition. Cash prizes. — Entries, September 30. (Service Co. (London), Ltd., 273, High Holborn, London, W.C.i.) Coronet Midget Camera Competition . Cash prizes. — Entries, September 30. (Coronet Camera Co., 310, Summer Lane, Birmingham, 19.) Eighth International Photographic Salon of Japan. — Entries close in Tokyo, September 30 ; open, November (Tokyo and Osaka). (Sec., International Photographic Salon, Tokyo Asahi Shimbun, Tokyo, Japan.) Johnson’s ” Holiday ” Competition. Cash prizes. — Closing date, October 31. (Johnson & Sons, Ltd., Hendon, N.W.4.) U.P. International Exhibition of Photography, 1936 (Lucknow). — Entries, November i ; open, December 5, 1936-February 4, 1937. (Dr. K. N. Mathur, D.Sc., A.R.P.S., Hon. Sec., U.P. Amateur Photographic Association, Lucknow University, Lucknow.) Entry forms obtainable also from the Editor of The Amateur Photographer. Tenth International Christmas Salon of Pictorial Photography (Antwerp). — Entries, November 15 ; open, December 20, 1936-January 3, 1937, (J. Van Dyck, Sec., Fotographische Kring ” Iris,” Ballaestr. 69, Antwerp.) FACTS and FORMULA ONE or more items of practical value to the amateur photographer are given under this heading in every 'issue. They are printed in either the vertical or horizontal form as shown here, and each is complete in itself. These facts and formulse are intended to be cut out and pasted on the thin cards of the standard size, 5x3, supplied for card index cabinets. The collection when completed will form a concise guide to photographic practice that every regular worker will value for reference, and for that reason no copies should be missed. ” A.P.” filing cabinets have been specially prepared for this card index, and are now ready. The size of the box is 5^ x 3^ x 3 and each is supplied complete with a set of alphabetical index cards and 150 cards for pasting on the ” Facts and Formulae.” They are obtainable from our publishers, Messrs, lliffe & Sons Ltd., Dorset House, Stamford Street, S.E.i. Price 2s. 6d. 16. MOUNTANTS pHOTOGUAPHIC prints are mounted on card or mounting paper by one of the follo^ving methods.: (1) by being “ tipped ” on with a strong adhesive, such as Seccotine,” applied to the back at the two top comers or the top edge only ; (2) by being pasted all over the back with a suitable paste before affixing to the mount ; and (3) by dry mounting. The first method is obvious in its application. The third will be dealt with in a later contribution. The second method is the one most frequently used by amateurs, and the following are suitable pastes or mountants for the purpose. starch Paste. This is a very qtiickly prepared paste, is clean and very adhesive when fresh, but does not keep well. It is made by mixing pure starch with a small quantity of cold water to make a very stiff cream. Boiling water is then poured on in a thin stream, stirring the mixture all the time until the mass turns to jelly. It is ready for use as soon as it is cold. Apply with a stiff brush. Dextrine Mountani. This is the most reliable paste for mounting photographs. A good formula is as follows : — Best white dextrine . . . . . . 14 oz. Water . 20 oz. Oil of wlntergreen . . . . 20 drops. The water should be heated to about 160® Fabr, The dextrine is then stirred in slowly until it is dissolved. The oil of wlntergreen is added, and the stirring continued for some time. Pour into suitable wide-mouthed bottles to cool. It will take several days to set into a firm white paste, and is then ready for use. This paste keeps well. Starch-Dextrine. This combination makes a good paste for all¬ round purposes and keeps well. Pure starch . . . . . . . . 120 gra. Best white dextrine . . . . . . 4 oz. Sodium carbonate . . . . . . 10 grs. Oil of wlntergreen . . . . . . 20 drops. Water . 10 oz. Mix in the above order to make a thin cream free from lumps. Bring to the boil, stirring all the time, and pour into jars. This will take a day or two to set and it is then ready for use. 17. AN ENLARGING TABLE Distances from negative to lens and from lens to paper. Focus of TIMES OF ENLARGEMENT. Lens, in. 2 3 4 5 6 7 8 in. in. in. in. in. in. in. 2 6 8 10 12 14 16 18 3 2f 2* 2i 2* 2* 2* n 10 12* 15 17* 20 22* 3i Si Si 3 3 2B 2| 3 9 12 15 18 21 24 27 4k 4 3| S'i 3* 3f 3| CO m 14 17* 21 24* 28 31* 4f 4* 44 4 4 4 4 12 16 20 24 28 32 36 6 5* 5 41 4? 4* 4* 4^ 13^ 18 22* 27 31* 36 40* 6 5f 5* 5* 51 5 5 15 20 25 30 35 40 45 6f 6 6f 5* 5k I6k 22 27* 33 38* 44 49* Si 6* 64 6t\ 6t 6fV 6 18 24 30 36 42 48 54 9 8 7* 7* 7 6a H 7 21 28 35 42 49 56 63 10* 9* 8| 8f Si 8 7* 8 24 32 40 48 56 64 72 12 lOf 10 9i 9* 91 9 First ascertain the fbgal length of lens in enlarger. Then decide on number of times enlargement to be made. This is found by comparing the length of diagonal of the negative with that of the enlargement decided on. The point of intersection of the vertical and horizontal columns gives the distances required. The greater of the two numbers where the two intersect is the distance from lens to the sensitive paper. The leaser is the distance from lens to negative. 71 29