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Ihe amateur photographer
p 6 CINEMATOGRAPHER o
persuaded to follow. The report also deplores the tendency to concentrate on the street front of a building, leaving the sides and back unfinished or unsightly.
Building a Colour Camera.
It is good to learn that the zest for making three-colour cameras still obtains among a certain group of interested people, perhaps because there is something very engaging in puzzling out the complicated optical and other arrangements. But the trouble begins when the design is handed over to the craftsman. One worker, an expert in three
colour, told us that there never were such embodiments of obstinacy as the makers of cameras, who insist upon incorporating their own ideas ; and another designer said that, after having developed his threecolour construction, he took his lenses and prisms to a camera-man who had had a' good deal of experi¬ ence, and at the end of three months, when he called again, the job was not even started. It is one thing to design and another to build, and yet, as this second worker proudly showed, having gone to someone else who produced his camera within a month, they can be built, and built to work, too.
April 4th, 1934
Of Making Books.
In the United States there is issued every five years a Book Index of the titles of the books in English published during the quin¬ quennium. In the latest of these volumes, cataloguing the books for the years 1928 to 1932, we count 169 books on photography. This leaves out of account books on photo-engraving and on certain spe¬ cial subjects and cinematography. The photography of animals alone has been the subject during the period of thirty books ; the photo¬ graphy of birds of five. But only seven books on colour photography appeared in the list.
The A mateur Photographer” EXPOSURE TABLE — April
EVERY MONTH a brief exposure table will be provided for the assistance of our readers in their practical work. A glance at the current approximate exposures as here given will serve as a reliable guide for most purposes. The subjects will be varied to suit the time of year. The following exposures will serve as a working guide for any fine day during the month, between the hours of 10 in the morning and 2 in the afternoon, with the sun shining, but not necessarily on the subject. Stop used, f/8. The exposure should be doubled if the sun is obscured or if stop f/n is used. For f/16 give four times the exposure. For f/5.6 give half. From 9 to 10 a.m. or from 2 to 3 p.m., double these exposures. From 7 to 9 a.m. or from 3 to 5 p.m., treble them.
N.B. — The times given above are by “ sun time.” The exposures, therefore , which are laid down as suitable for 2/04 p.m., for instance , will be those to be given between
3 and 5 p.m. by the clock, during “ summertime,” which begins on April 22nd.
Subject.
Ordinary Plate.
Medium Plate.
Rapid Plate.
Extra Rapid Plate.
Ultra Rapid Plate.
Open seascapes and cloud studies . .
1/20
sec.
1/30
sec.
1/60
sec.
1/80
sec.
1/100 sec.
Open landscapes with no very heavy shadows in foreground, shipping studies or seascapes with rocks, beach scenes, snow scenes with no heavy foreground . .
1/12
* y
1/18
y y
1/35
y y
1/50
y y
1/60
yy
Ordinary landscapes and landscapes with snow, open river scenery, figure studies in the open, light buildings, wet street scenes
1/5
y y
1/8
y y
1/15
y y
1/20
y y
1/25
y »
Landscapes in fog or mist, or with strong foreground, well-lighted street scenes . .
1/4
y y
1/6
y y
1/12
y y
1/15
y y
1/20
y y
Buildings or trees occupying greater portion of picture
1/2
y y
1/4
y y
1/5
yy
1/6
y y
1/8
yy
Portraits or groups taken out of doors, not too much shut in by buildings . . . .
4
y y
1
y y
1/2
y y
1/3
y y
1/4
y y
Portraits in well-lighted room, light sur¬ roundings, big window, white reflector . .
5
secs.
4
secs.
2 secs.
4
y y
1
y y
As a further guide we append a list of some of the best known makes of plates and films on the market. They have been divided into groups, which approximately indicate the speeds referred to above. The hypersensitive panchromatic plates and films require less exposure than the ultra-rapid.
Ultra Rapid.
Agfa, Special Portrait.
„ Super Pan. Film.
„ Super-speed Film.
„ Isochrom Film.
„ Ultra Special.
Barnet, Press and Super Press„ XL Super-speed Ortho. „ Soft Panchromatic.
,, Studio Fast.
„ Ultra Rapid.
Criterion, Enelite.
Eastman, Par Speed Cut Film.
„ S.S. Cut Film.
„ S.S. Pan. Film.
Gevaert, Super Sensima.
„ Sensima Fast.
,, Sensima Ortho.
,, Super Chromosa.
,, Roll Films and Packs.
Hauff, Ultra Rapid.
„ Ulcroma.
„ Ultra Roll Film and Pack.
Herzog, Ortho-Isodux Film Pack.
Ilford, Golden Iso-Zenith.
„ Iso-Zenith.
„ Hypersensitive Pan.
Plates and Films.
„ Portrait Film (Ortho
Fast).
„ Monarch.
„ Press.
,, S.S. Ex. Sens.
„ Zenith Ex. Sens.
„ S.G. Pan.
Illingworth, Fleet.
„ Super Fleet.
„ Super Fleet Ortho
„ Pan. Fleet.
Imperial, S.S.S. Press Ortho.
„ Eclipse.
„ Eclipse Ortho Soft.
,, Eclipse Soft.
„ Eclipse Ortho.
,, Eclipse Pan. Soft.
Kodak, Verichrome Film.
Marion, Record.
„ Iso Record.
Selo, Selochrome Roll Film and Film Pack.
„ Selo. Pan. Roll Film. Standard, Film.
Wellington, Anti-screen.
,. X Press.
Zeiss Ikon, Pernox Roll Film and Packs.
Extra Rapid.
Agfa, Chromo.
„ „ Isolar.
„ Extra Rapid.
,, Isolar.
„ Iso Rapid.
,, ,, ,, Chromo.
„ Roll Film.
Barnet, S.R. Pan.
„ Studio Ortho.
Criterion, Iso E.R.
„ Portrait.
„ Roll Film.
,. Special E.R.
Ensign, Roll Film.
Gevaert, Filtered Ortho.
,, Chromosa.
„ S.R.
,, Regular Cut Film.
Hauff, Analo-Flavin.
,, Extra Rapid.
,, E.R. Ortho.
,, Roll Film and Pack. Ilford, Auto. Filter.
„ S.R. Pan.
„ Pan. Film.
„ Rapid Chromatic.
Imperial, Non-filter (new series). ,, Eclipse Pan. B.
„ S.S. Ortho.
Kodak, Roll Film and Film Pack Pathe, Roll Film.
Selo, Roll Film.
Zeiss Ikon, Roll Film and Film Pack. Rapid.
Barnet, S.R.
,, Self-screen Ortho.
Criterion, Extra Rapid.
Hauff, Ortho Anti-Halo.
Ilford, Screened Chromatic.
„ S.R.
,, Commercial Ortho Film. Imperial, Non-Filter.
„ S.R.
„ S.R. Ortho.
Kodak, Cut Film.
Lumiere, Extra Rapide.
,, Instantanee.
,, Pelliculaire.
Medium.
Ilford, Empress.
„ Chromatic.
Ordinary.
Barnet, Ordinary.
Criterion, Ordinary.
,, Ordinary Iso. Gevaert, Ordinary.
Ilford, Ordinary.
,, Rapid Process Pan. Imperial, Ordinary.
„ Pan. Process.
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