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The Barnet Book of Photography A Collection of Practical Articles

This is preferable to a turntable


The

cross-front should have a movement of about one-quarter of the length of the plate each way.

It may be useful to know that a little more rise can be obtained by the placing of the lens above the centre of the cross-front; reference to the photograph of camera will explain this matter more fully.

The swing-back should be a practical one, working from the centre, and capable of being swung either to or from the lens.

In many of the cheaper front extension cameras it is not possible to use the swing-back when tilting the camera down, only when tilting upwards. The swing-front, although not an absolute necessity, is undoubtedly a movement possessing great advantages, especially when the front is raised rather high, and one is using a lens of limited covering power. This movement should be acquired if possible.

The camera should possess double extension, focussing by rackwork, and having a reversing back so made that it will fit on all ways; it is then possible to draw the slide shutter out in any position.

In selecting a tripod stand purchase one of the kind known as the sliding leg variety, two-fold is better than three, giving greater sliding power. The top of stand should be as large as possible; this is preferable to a turntable, as this piece of workmanship is seldom rigid after a little use, and some difficulty

is experienced when trying to spread the legs out rather wide. A two-fold Ashford stand is as good as any on the market.

The blocks herewith illustrate the kind of camera used by myself, and with the exception of the turntable, which is not a great success, it answers all requirements.

In the selecting of suitable lenses a great deal will depend upon the inclination of the purchaser and the depth of his pocket.

There is such a great variety upon the market at the present time, that to the young photographer the buying of the right lenses is somewhat a difficult problem.

[Illustration]

[Illustration]

The Zeiss series are undoubtedly the finest obtainable and for architectural work are unrivalled, possessing great covering power, good marginal definition, and in fact very fine definition all over the plate. The lenses of this series, although quite new, have met with great favour amongst architectural workers.

They work at an aperture of _f_/18, but I understand that they can be opened to _f_/16 and numbered on the _f_ system. As regards their relative working capabilities they give about the same picture at _f_/32 that the majority of wide-angle lenses give at _f_/64.

The Goerz anastigmats are also another very fine series but do not give anything like the covering power of the last mentioned, and moreover are nearly double the price. Their special merit is that one can work at _f_/8 or _f_/11, and get a picture sharp up to the edges. Taylor, Taylor & Hobson also make a good wide-angle lens, possessing great covering power and at a moderately low price. With one of their nine inch lenses I have covered a plate 12 x 10 inches.

[Illustration: "GATHER THE ROSES WHILE YE MAY, OLD TIME IS STILL A-FLYING." ALEX. KEIGHLEY.]

For a whole-plate camera, a useful battery would be a 5 inches, 7-1/2 inches, 9 inches and 12 inches; for 10 x 8, 7 inches, 9 inches, 10-1/2 inches and 14 inches. The three last in each case are the most useful.


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