#SPENCER FINGERPRINT MAGNIFIER PORTABLE#
#SPENCER FINGERPRINT MAGNIFIER FREE#

The single lenses of Bausch & Lomb sell from about 90 cents to $1.50 and have a magnification of from 3 to 5X. These arc available in single pocket lenses, also double and triple types in which three simple lenses are put together.

#SPENCER FINGERPRINT MAGNIFIER PORTABLE#

It is an excellent instrument for examining cracks, defects and primers, since it does not distort the field of view in the slightest.Ī third type of glass used by many handloaders is the so-called 'folding pocket magnifier' used by police officers and scientists who desire magnification in an extremely portable form. in diameter (about 1% inches), and magnification is 4% X. In the Bausch & Lomb type of construction this glass is known as the 'Utility Magnifier,' catalog number 229. When an attempt is made to get a glass of this grade, the purchaser would do well to obtain either the Spencer or the Bausch & Jxmib. The important thing is to sccurc a truly good glass. It is not necessary for the intelligent handloader to purchase one of these stands, as he can buy the ordinary glass and make some sort of support to meet his own requirements. At the same time it can be obtained in various special stands costing more money. This glass is available in a standard horseshoe-type base or stand, thus eliminating the necessity for holding it in the fingers. This glass has recently been adopted by stamp collectors for examination of specimens. A very excellent glass for the purpose is what is known commercially as a ' fingerprint magnifier,' designed primarily for the use of fingerprint experts in examining either photographed or latent prints. A glass of this type naturally costs much more than one with the so-called 'single-lens' system, but it is well worth the initial investment and will speed up the work of the inspection to a remarkable degree.

#SPENCER FINGERPRINT MAGNIFIER FREE#

By this I mean that it should be optically correct through a multiple-lens system, so dial the field of vision is entirely flat and free from distortion. The ideal glass, of course, would be a corrected magnifier. There are many German glasses on the market which can be purchased for seventy-five cents up. Bausch & Lomb reading glasses can be obtained for two dollars up, depending on size. Naturally, the better the glass, the more expensive it will be, but the best of glasses are quite reasonably priced. There are a number of good glasses on the market, all suitable for magnifying purposes, and obtainable at almost any price the handloader desires to pay. Examination under a glass will bring out these dcfccts with greater case, eliminate eye strain, and speed up the inspection. Case necks should always be true, and necks that are thin after firing, are inclined to draw out more on one side than the other, thus giving an imperfect neck length. In use, the operator picks his case up normally, holds it beneath the glass, and slowly rotates it, raising or lowering it to bring the part of the case to be examined into proper focus. This set-up is useful in examining all types of cases. For the greatest of ease in handling, the handle of the glass should be attached to an upright, thus permitting plenty of room underneath for the use of the hands. A magnifying glass, even of the cheapest of 'reading glass' types, is useful for this. Only by careful visual inspection can the thin case necks be detected. Thin cases also are inclined to start a bullet tipping, since the bullet lets go on the thin side before it releases on the thick portions, because of the lesser elasticity of the brass. Thin case necks throw the bullet oil-center, thus starting it into the barrel improperly. The drawing process very frequently thins the neck of the case more on one side than the other-such cases should never be used for the finest of target or long-range varmint loads. Precision handloading calls for something more than carefully weighed powder charges it requires proper sorting of cases into matchcd groups, and once sorted, these cases should never be mixed indiscriminately. Only careful inspection can verify this, and the inspection should be performed each time the case is reloaded. In this game one should never assume that all cartridge cases are alike or that they are in perfect condition. EXCELLENT though the factory Inspection tests are, they can be elaborated upon by the careful handloader.

Spencer fingerprint magnifier