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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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PHOTOGRAPHIC ENLARGER LIGHT SOURCE xx PHOTOGRAPHIC ENLARGER Build an electronic focus booster. An inexpensive way to increase the effective maximum aperture of your enlarging lens by one stop for more accurate focusing. Easily switch between 75-watt exposure level and 150-watt output for focusing. Tips on eliminating the hot spot in the middle when using an SP-2 Elwood enlarger. Starter settings for making test prints with the 45A Beseler/Minolta Light source. Build a lamphousing that converts a Bender 4x5 view camera into an enlarger. Condenser vs. diffusion. Experiments with using the low-wattage, Osram fluorescent bulb as an enlarger light source. Includes tips on fitting the bulb to a condenser-style lamp housing. Quickie enlarger test. Testing for alignment, dirty condenser, and uneven illumination. User test of the Aristo Cold-Light Enlarging head, plus tips on getting good enlargements from cold lights. Profile of the Ilford Multigrade 400 system combining special enlarger heads with variable contrast printing papers. Enlarger light sources. Making an informed choice of light source for black-and-white enlarging. A comparison between diffuse and condenser light sources. Modifications to the Omega D2 enlarger include the adaption of a Dichro II lamphouse by means of a special bracket. Tips on using the Beseler/Minolta 45A light source to print Cibachrome material. Densitometry and the Beseler/Minolta 45A enlarger light source. Two methods for using the analyzer section of the 45A as a transmission densitometer. Tips on making VIN internegatives using the 45A. Modifying the Beseler/Minolta 45A enlarging light source for black and white printing. Comparison of point source, cold light and electronic-flash light sources. Techniques for using the new Beseler/Minolta 45A light source with premium variable-contrast black-and-white papers. Variable-constrast printing light sources. Looks at both commercial products and do-it-yourself modifications. Tips on choosing between a diffusion or condenser enlarger. Tips on exposing variable-contrast papers using cold-light heads. Techniques for calibrating a Beseler Dichro 45S color head for use with variable-contrast b&w paper. Tips on acquiring 6x7cm condensors for the Phillips PCS 130 enlarger. Tip: Proper way to test light output of an enlarger head. Comparison of condensor heads and cold light (fluorescent) heads in making photographic enlargements. Point source light for enlargers. Includes tips on making your own point source lamp housing from a coffee can and a 12-volt auto bulb. Add a dimmer switch to your photographic enlarger to provide longer exposure times when working with thin negatives or making small prints. User comments on using the point-source enlarging light. Condenser vs. diffusion. Which enlarger illumination system is right for your b&w printing? Tip: Enlargers with spring-loaded, socket-inserted bulbs can be operated on 12-volts when equipped with an automobile tail light bulb. Ideal for a portable darkroom. Tip on converting you condenser enlarger to a "diffusion" enlarger using a piece of frosted acetate. Tip: Extend photo enlarger bulb life by using AC-to-DC current converter "buttons". How to use an ordinary light bulb as a temporary replacement for an enlarger bulb. Build an enlarger-lamp voltage controller for black-and-white photographic printing. Est. cost: $35. Taking things for "granite". Three photographic myths are exposed using research and/or simple tests. (1) Depth of field and focus. (2) Enlarger light sources. (3) Print dry-down. Light quest. Black-and-white without cold light. The light source of a well-made color head proves to be a superior alternative to a cold light head. Adventures in color printing. Installing and using the Beseler 810 light source designed to allow printing of 8"x10" negatives on a 4"x5" enlarger. Dandruff in the dark. Exploring the relative visibility of negative dust with various enlarger light sources. Tips on using a color head to expose variable contrast (VC) fiber-base B&W papers. Build a lamp dimmer control for your photo enlarger. Brief overview of methods for regulating AC voltage to a photographic enlarger. Voltage regulator for photographic enlarger lamp. Make your own point light source for a condenser enlarger. Tips on construction and use. Enlarging without electricity. Uses flashbulbs as a light source for "emergency" printmaking. How to choose a voltage regulator for your photographic enlarger. Tip: Reversing the orientation of tungsten-halogen bulbs in your color enlarger can contribute to color errors. Other light source problems and their solutions are discussed. Tip: Use a piece of matte mylar drawing film in the filter drawer of your enlarger to reduce the amount of light passing thru the negative. Make easier color prints in a flash. A product review of the Beseler/Minolta 45A color head and tips on its use. Point-source enlarger and how it differs from a standard condenser enlarger is explained. Tips on printing variable contrast b&w paper using cold light. Tips on using a Beseler/Minolta 45A color head for variable-contrast black-and-white printing. Calibrating dichroic color heads for variable contrast black-and-white printing. A tale of three enlarger heads (condenser, cold light, and dichroic). A look at what effect the enlarger light source has on print quality. Part 1. Methodology, flare, light scattering, uniformity of illumuination, and effect on color printing. A tale of three enlarger heads (condenser, cold light, and dichroic). Part 2. Black-and-white print sharpness, contrast, and tonality. The blitz printer. Adapting an enlarger to use electronic flash as the light source. Best suited for making color enlargements on Kodak and Polaroid instant print films. Includes easel for instant film and paper. Black-and-white enlarging. A comparison of condenser, diffusion and cold light enlargers. How to utilize a B&W computer monitor (CRT) as the light source for a photographic enlarger. When combined with a computer graphics program, this CRT tube becomes a sophisticated light source capable of performing dodging and burning operations without the use of any other tools. Tip on replacing the diffusion glass in an old Elwood Special Enlarger. Add voltage regulation to a color photo enlarger. Will maintain dc voltage within 1% even if the ac line voltage varies up to 10%. Est. cost: $20. Power regulator for a photographic enlarger will keep power surges and dips from changing the exposure on photo prints. Est. cost: $25-$35. Intensity switch for your enlarger cuts light input in half for printing thin negatives. Six darkroom projects. (1) cardboard light box, (2) floating tray lids, (3) spacer for focus magnifier, (4) press for flattening prints, (5) borderless enlarging easel and (6) enlarger light intensity control. Condenser -vs- diffusion enlarger heads. A comparison of printing effects using conventional condenser, point-source condenser, cold-light diffusion and quartz-halogen diffusion. Condenser light source converts 2-1/4x3-1/4 press camera into enlarger. Using a dichroic enlarger for B&W printing on variable contrast (VC) paper. The Callier effect. Understanding the differences between condenser and diffuser enlargers. | |||||||||
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