IMPORTANT SAFETY INSTRUCTIONSWhen using your photographic equipment, basicsafety precautions should always be followed, in-cluding the following:

1. Read and understand all instructions beforeusing,

2. Close supervision is necessary when any appli-ance is used by or near children. Do not leaveappliance unattended while in use.

3. Care must be taken as burns can occur fromtouching hot parts.

4. Do not operate appliance with a damaged cordor if the appliance has been dropped or dam-aged—until it has been examined by a qualifiedserviceman.

5. Position the cord so that it will not be trippedover, pulled, or contact hot surfaces.

6. If an extension cord is necessary, a cord with acurrent rating at least equal to that of the appli-ance should be used. Cords rated for lessamperage than the appliance may overheat.

7. Always unplug appliance from electrical outlet be-fore cleaning and servicing and when not in use.Never yank cord to pull plug from outlet. Grasp plugand pull to disconnect.

8. Let appliance cool completely before putting away.Loop cord loosely around appliance when storing.

9. To reduce the risk of electric shock, do not immersethis appliance in water or other liquids.

10. To avoid electric shock hazard, do not disassemblethis appliance, but take it to a qualified servicemanwhen some service or repair work is required. Incor-rect reassembly can cause electric shock when theappliance is used subsequently.

11. The use of an accessory attachment not recom-mended by the manufacturer may cause a risk of fire,electric shock, or injury to persons.

12 Connect this appliance to a grounded outlet.

13. Disconnect this unit from its source of supply beforereplacing the projection lamp.

SAVE THESE INSTRUCTIONSCopyrighted Underwriters Laboratories, 'Standard for Safety, UL 122, Photographic Equipment'

CONTENTSImportant Safeguards Inside CoverSpecifications Inside CoverIntroduction Inside CoverI. Installation Instructions 2II Controls and Component Descriptions 3

III. Changing Mixing ChambersIV. How To Use The Dichro 45SV. Black And White PrintingVI. Maintenance .

3455

DICHRO 45SSPECIFICATIONS

Line Voltage:Model #8278, 120V ±10%, 60HzModel #8279, 220/240V ±10%, 50Hz

Electronics: Internally stabilized, solid stateLamp: Catalog #8108 — 82V, 250WType of Filtration: Dichroic Interference FiltersFiltration: Yellow, Magenta, CyanAuxiliary Filtration: IR, UV filtration integral in each

mixing chamberBlower: Self-contained rotary fan

Mixing Chambers: Interchangeable -Standard 4x5Optional 6x7 (Catalog #8292)

35mm (Catalog #8291)Condenser light source with adapter

(Catalog #8294)Dimensions: 17%" (451mm) wide, 7" (178mm) high,

91/8" (232mm) deep. Overall height mounted onenlarger, measured from support stage:Diffusion mode — 8" (203mm); Condensermode — 131/2" (343mm)

Weight (with mixing chamber): 14 Ibs. 4oz. (6.5 Kg)Shipping Dimensions: 21" (533mm) wide, 14"

(356mm) high, 131/2" (343mm) deepShipping Weight: 18 Ibs. 6 oz. (8.3 Kg)

INTRODUCTIONCongratulations! With your purchase of the BeselerDichro 45S Colorhead you have acquired a trulyversatile colorhead. The Dichro 45S is a solid-state,dichroic colorhead incorporating a self-contained,stabilized power supply and cooling system. Itrepresents the latest in electronic technologyapplied to color printing.

The colorhead is designed to work equally well withthe Beseler 45V-XL, or 45M series enlargers andinstallation is simple. The Dichro 45S offers diffusionor condenser (optional) color and black and whiteprinting for formats ranging from sub-miniature to4"x5" negatives.

We strongly recommend that you thoroughly readthis instruction manual to fully acquaint yourselfwith the colorhead and learn how to take advantageof its many capabilities.

If you desire to begin printing immediately with yourDichro 45S, we suggest that you familiarize yourselfwith the colorhead and its controls (Figures 1 and 2with descriptions) and then follow the directions inSection I, Installation Instructions, and Section IV,How to Use the Dichro 45S. The remainder of themanual contains additional valuable informationwhich will increase your understanding of theDichro 45S.

9

1. POWER SWITCH 2-position switch:"Off" — Colorhead off"On" — Operate position

2. ACCESS DOOR Provides entry to thecolorhead to change mixingchamber or lamp.

3. YELLOW FILTRATION CONTROLSets desired amount of yellowfiltration.

4. MAGENTA FILTRATION CONTROLSets desired amount of magentafiltration.

5. CYAN FILTRATION CONTROL Setsdesired amount of cyan filtration.

6. WHITE LIGHT LEVER Removes filtersfrom light path for "white light"focusing.

Figure 1

7. WHITE LIGHT INDICATOR Illum-inates when paper saver circuit isactivated. Prevents wasted colorprint paper by not permittingexposure to unfiltered light.

8. FILTRATION INDICATOR WINDOWSDisplays filtration values of Y,M and C.

9. POWER CORD Three-prong plugconnects to convenience outlet onenlarger (or wall outlet).

10. TIMER CORD Three-prong plugconnects to outlet on timer.

11. MOUNTING COLLAR To attachcolorhead to a Beseler 45M seriesenlarger.

12. MIXING CHAMBER Interchangeablechambers available to optimallyilluminate the selected format(4x5, 6x7, 35mm, condenser).

13. SAFETY SWITCH Shuts off powerwhen access door is opened.

14. LOCATING PIN AND SLOT Cor-rectly positions mixing chamber incolorhead.

15. HEAT ABSORBING GLASS Two-piece glass absorbs infra-red.

16. LAMP DOOR Access to change lamp.17. LAMP Type 8108, 82 volts, 250 watts.18. LAMP EJECTOR Aids in removing

lamp.

I. INSTALLATIONINSTRUCTIONS

The Dichro 45S Colorhead is a self-contained unit,and is shipped with a 4x5 diffusion mixing chamberand 250 watt lamp in place. To mount the colorheadonto a Beseler 4x5 enlarger for diffusion printing,just follow these simple instructions:

A. If your enlarger is equipped with a Resistrolaccessory, unplug it, as it cannot be used in con-junction with the colorhead.

B. Adjust the negative stage of the enlarger to the4"x5" position on the negative size scale. Lock thenegative stage in place by tightening the negativestage lock knob on your enlarger.

NOTE: The illumination system of the colorheadrequires that the upper bellows remain in the 4x5position (fully collapsed) during diffusion printingwith all negative sizes.

C. Remove the two screws holding the negative sizescale in place and detach scale.

If your enlarger does not have a condenser lamp-house, pull forward the housing latches and go onto step E.

D. Unplug the condenser lamphouse power cordand remove the lamphouse/condenser assembly bypulling the support latches forward (see Fig. 3) andlifting the assembly clear of the enlargers. Store theassembly in a safe, dust-free place.

E. Place the colorhead on the enlarger so that thecolorhead mounting collar (Fig. 1, item 11) slidesinto the opening in the support stage.

Figure 3

F. Once the colorhead is sitting squarely on theenlarger, lock it in place by pushing the latches back.

G. The lamp and the electronic power supplies inthe colorhead are stabilized. DO NOT use an exter-nal stabilized power supply. The Dichro 45S has twoline cords—one for AC line voltage, the other to con-nect to the timer. The power cord (Fig. 1, item 9) ison the right and should be plugged into the conve-nience outlet on the enlarger motor box (on 45MXT)or to a grounded AC outlet. The grey timer cord (Fig.1, item 10) is on the left underside of the colorheadand is inserted in the "Enlarger" outlet on yourtimer. See Figure 4 for typical AC connections. Youare now ready to begin diffusion printing with yourDichro 45S.

CU CU C3

Colorhead

Timer

Motor Control Box

To GroundedWall Outlet

-•-<}=

Figure 4

2

For Enlargen Without ConvenienceOutlet, Connect Directly toGrounded Wall Outlet.

II. CONTROLS ANDCOMPONENTDESCRIPTIONS

A. POWER SWITCH Two position switch (OFF,ON). Activates blower and all circuitry.

B. FILTRATION CONTROLS By turning the appro-priate knob, any desired amount of yellow, magentaor cyan filtration may be introduced into the lightpath. Indicator windows above controls are labeled"Y", "M" and "C" respectively.

C WHITE LIGHT LEVER/PAPER SAVER CIRCUITThe White Light Lever removes the dichroic filtersfrom the light path for easy "white light" focusing.Pushing the lever away from you moves the filtersout of the light path. Pulling the lever toward youreturns the filters to their original position.

The unique Paper Saver Circuit built into the Dichro45S will prevent the lamp from turning on if the filterretractor is left in the "White Light" position. If youshould forget to return the filter retractor to the"Filtration" position after focusing, the colorheadwill not permit you to waste a sheet of paper with a"white light" exposure. Instead, an indicator on thefront panel of the colorhead will light up, remindingyou to reset the timer and return the retractor to theforward position. Notethat whilethecolorhead can-not be turned on with the filters retracted, the filtersmay be retracted when the colorhead is turned on.The Paper Saver Circuit puts an end to paper wastecaused by unfiltered exposures.

D. MIXING CHAMBERS A special 4x5 diffusionmixing chamber is standard with the Dichro 45S.Accessory mixing chambers for 6x7 and 35mm dif-fusion printing (Catalog #8292 and 8291 respec-tively) and a condenser chamber (Catalog #8294)are available from your Beseler dealer. All chambersinclude IR and UV filtration.

E. COOLING SYSTEM The Dichro 45S cooling sys-tem is of flow-through design, incorporating a self-contained rotary fan. The fan, located on the leftside of the housing, drives in cool air through theinlet on the left, across the electronics and the lampand out the exhaust vent on the right. The blower issecured on vibration mounts which prevent unduevibration from reaching the negative and lens stagesand distorting the image.

F. STABILIZED POWER SUPPLY The voltage forthe colorhead's lamp and electronics are internallystabilized over an AC line voltage range of ±10%from the normal. A separate stabilized powersupplyis not required.

G. FILTRATION INDICATOR WINDOWS The analogydials are back-lighted when the main power switch is on.

III. CHANGING MIXINGCHAMBERS

The Dichro 45S comes with a 4x5 diffusion mixingchamber as standard equipment. Optional diffusionchambers for 6x7 and 35mm formats and a Con-denser Mixing Chamber are available from yourBeseler dealer.

Whenever you wish to change mixing Chambers, besure the power switch is in the "Off" position andfollow the procedure outlined below.

A. Open the access door by unscrewing the two thumbscrews located on top of the colorhead. Carefully liftout the chamber.

B. Pick up the other chamber and make sure the mixingchamber window (heat absorbing glass—Fig. 2, item15) and the locating pin (Fig. 2, item 14) are on theright; that is, toward the lamp.

C. Insert the chamber into the colorhead and engagethe locating pin in the slot on the right side of thechamber area housing. Slide the chamber into place.

D. Close the access door and tighten the two thumbscrews to secure.

DICHRO 45SThe following information should help you to getstarted making color prints from negatives with yournew Dichro 45S colorhead.

A. Put your negative into the enlarger. Size, com-pose and focus the image as usual.

B. Dial in the recommended starting filter pack ofSOY + 40M for Kodak RA-4 paper. Set your lensto f/8 in the DIFFUSION mode and f/16 in the CON-DENSER mode.

C. Make a test strip for density, varying only theexposure time (not the lens aperture or the filterpack).

D. Evaluate the test strip for density.

Lit any section of the test strip shows exactly theright density, you're all done testing. Recordthe exposure time which produced it.

2. If one section of the test strip is too light and theadjoining section is too dark, an intermediateexposure time is required. For example: If theexposure time for the light section was 10seconds and the exposure time for the darksection was 20 seconds, the proper exposuretime will be somewhere in between 10 and 20seconds. (If in doubt, you might want to make asecond test strip using intermediate exposuretimes such as 12-14-16-18 seconds.)

3. If all four sections are too light, open up theaperture of your enlarging lens by two fullf/stops and repeat the test using the sameexposure times. (The original test strip wasunderexposed.)

4. If all four sections are too dark, close down theaperture of your enlarging lens by two fullf/stops and repeat the test using the same ex-posure times (the original test strip was over-exposed).

5. Once the aperture setting and exposure timehave been determined, the next step is toidentify the PREDOMINANT color on the cor-rectly exposed section of the test strip.

E. Identify the Predominant Color.

If your test strip happens to be perfectly color-balanced, you are immediately ready to make acolor print without making any adjustment to thefilter pack. It's far more likely, however, that yourtest strip will have a preodminant color cast whichyou will want to remove before making yourfull-sizecolor print. You must first identify the predominantcolor cast and then refer to the COLOR BALANC-ING table for directions on how to remove it.

The table shows what adjustments are necessary tocolor correct prints made from negatives or slides.

If first printmade from anegative istoo:

Yellow

Magenta

Cyan

Blue

Green

Red

Or the firstprint madefrom a slideis too:

Blue

Green

Red

Yellow

Magenta

Cyan

MAKE THIS CORRECTIONBEFORE EXPOSING THENEXT PRINT:

Add Yellow or SubtractCyan and Magenta

Add Magenta orSubtract Cyan andYellow

Add Cyan or SubtractYellow and Magenta

Subtract Yellow or addCyan and Magenta

Subtract Magenta oradd Cyan and Yellow

Subtract Cyan or addYellow and Magenta

Experience will show how much of an adjustment isnecessary for prints requiring varying degrees ofcorrection and what starting filter pack to use inmaking a first print. Note that there are two possibi-lities for each correction. Do not dial in the third filtervalue since the combination of filtration (Y + M + C)will result in neutral density causing loss of illumina-tion and the need to increase exposure.

If you have just started color printing, it is a goodidea to save those prints with which you are notsatisfied. On the back mark the filtration and ex-posure time with which they were made and com-pare them to your final prints. This is the bestmethod of learning the effects of changing filtra-tion (and exposure) on your Dichro 45S Colorhead.

V. BLACK AND WHITEPRINTING

The Dichro 45S may be used for black and whiteprinting in either the Condenser (optional) or Dif-fusion mode. Because of the nature of the black andwhite negative, a condenser system provides highercontrast and more apparent definition However,where dust and scratches may be a problem, or fornegatives that have been retouched, a diffusion sys-tem will produce cleaner looking prints andminimize the necessity for spotting.

It is generally desirable to set all filtration dials to getreadouts as close as possible to "000" during blackand white printing. When printing with variable con-trast papers, the colorhead can be used to controlcontrast, without the need of an additional set offilters. The tables below show what filtration settingswill approximate various paper grades on Agfa Multi-contrast, llford Multigrade, and Kodak Polycontrastpapers.

PaperGrade

0

1/2

1

11/2

2

2V2

3

3'/2

4

4! '2

5

MulticontrastFiltration

SOY

70Y

65Y

SOY

SOY

15Y

20M

30M

45M

TOM

130M

MultigradeFiltration

SOY

55Y

SOY

15Y

0

25M

40M

65M

100M150M200M

PolycontrastFiltration

75Y

SOY

25Y

10Y

10M

25M

40M

55M

70M

120M170M

VI. MAINTENANCEThe Dichro 45S requires virtually no regular main-tenance, other than to be kept free of dust when notin use. The only maintenance procedure is tochange the lamp when it burns out.

Lamp Changing Procedure(Beseler Catalog No. 8108)

1. Allow the lamp to cool prior to attempting tochange it.

2. Disconnect the power cord as a safety pre-caution.

3. Open the access door on top of the colorhead byturning the latches 90° (see Fig. 5)

4. Locate the lamp compartment and l i f t up door(Fig. 2, item 16).

5. Pull lamp ejector (item 18) to right and removeold lamp. See Fig. 6.

6. Insert new lamp firmly into socket until pins arefully seated. Close lamp door; close and lock accessdoor.

Figure 6

ACCESSORIESpm2A COLOR ANALYZERBeseler's newest coloranalyzer combines several ofthe most popular features from our line of high

quality analyzers. The pm2A pro-vides direct readout of filtrationand exposure on a large illum-

inated 41/8" meter. An ultra-sensi t ive photo mult ipl ierprobe assures you of accuratereadings in the lowest lightsituations yet can't be dam-

aged by white (room) light due to an automaticsafety overload circuit. Coarse and fine adjustmentknobs allow highly accurate panel programmingwhile an infinite number of programs can be storedvery easily via accessory "plug-in" program mod-ules. Completely solid state with internal voltagestabilization. 12 month warranty. Includes inte-grator.

Color by BeselerBeseler offers a widerange of processingequ ipment andchemistry for mak-ing beautiful prints.Processing drumscapable of handlingprints up to 16" x20", motorized agitator, tanks, reels and otherhelpful tools are available from your Beseler dealer.With Color by Beseler 2-Step or RA-4 chemicals, youcan produce fantastic color prints from negatives inas little as two minutes! Develop your colornegatives with CN2. Process slices with E6, andmake prints from those slides with 3-Step.

LIMITED ONE YEAR WARRANTY(Applicable in U.S.A., outside U.S.A. see local distributor)

Charles Beseler Company warrants its products (withthe exception of lamps), to the original purchaser only,to be free from defects in materials and workmanshipfor a period of one (1) year from the date of purchase.

This Warranty does not apply to our products whichshow evidence of accidental damage, misuse or abuseby you. The Warranty also does not apply to our pro-ducts which are defective or damaged by tampering orattempted repair by an unauthorized Beseler agent.

Beseler exclusively limits this Warranty to repair orreplace (at Beseler's option) the defective part of its pro-duct. If you decide to send our product to our authorizedrepair outlet, you must insure the product and prepay alltransportation expenses. Beseler will not be liable fordamages caused in the course of shipping the productto you. You must allow at least six (6) weeks for correc-tion of the defect.

ANY IMPLIED WARRANTIES OF FITNESS FOR USE,OR MERCHANTABILITY, THAT MAY BE CREATEDBY OPERATION OF LAW ARE LIMITED TO THE ONE(1) YEAR WARRANTY PERIOD.Some states do not allow limitations on how long animplied warranty lasts, so the above limitation may notapply to you.

NO LIABILITY IS ASSUMED FOR EXPENSES ORDAMAGES RESULTING FROM INTERRUPTION IN

OPERATION OF EQUIPMENT, DAMAGE TO FILM ORPAPER, OR FOR INCIDENTAL, DIRECT OR CONSE-QUENTIAL DAMAGES OF ANY NATURE.

Some states do not allow the exclusion or limitation ofincidental or consequential damages, so the above limi-tation or exclusion may not apply to you.

In the event there is any defect in materials and work-manship of our product you may contact our CustomerService Department at Charles Beseler Company, 1600Lower Road, Linden, N.J. 07036. This Warranty givesyou specific legal rights, and you may also have otherrights which vary from state to state. You may also haveimplied warranty rights. In the event of a problem withwarranty service or performance, you may be able to goto a Small Claims Court, a State Court, or a Federal Dis-trict Court.

IMPORTANT:

THIS WARRANTY SHALL NOT BE VALID ANDBESELER SHALL NOT BE BOUND BY THISWARRANTY IF OUR PRODUCT IS NOT OPERATEDIN ACCORDANCE WITH BESELER'S WRITTENINSTRUCTIONS.

You must prove the date of purchase by producinga sales receipt indicating that you are the originalpurchaser.

IMPORTANT! KEEP THIS INFORMATION HANDYFOR FUTURE REFERENCE

KEEP YOUR SALES RECEIPT!

SERVICE INFORMATION:(Applicable in U.S.A., Outside U.S.A. See Local Distributor)

Should you need service for your BESELER photographicequipment after the warranty has expired, please follow thesesteps:

PACK the product in the original packaging material to protectit in transit.

ENCLOSE complete information showing your name andaddress, what is wrong with the equipment, and the returnshipping address. Tape the information to the equipment to besure it does not get thrown out with the packing material.

ADDRESS the package to BESELER SERVICE MANAGER,1600 Lower Road, Linden, N.J. 07036.

PREPAY FREIGHT CHARGE AMD INSURE the packageagainst damage or loss in transit.

ESTIMATES. We will gladly provide estimates upon request.There is a flat estimate charge of $25.00 payable in advance.The estimate charge will be credited towards the cost off therepair. No work will be undertaken or billed until writtenapproval of the estimate is received.

CHARGES. Your local Beseler dealer has a list of current priceranges to service Beseler photographic equipment. Any repairlikely to exceed the maximum recommended service price willbe estimated and held for your approval before work is begun.

PAYMENT. Your check for $25.00 must accompany yourrequest for an estimate, alternatively, you may charge yourVISA or MASTER CHARGE account. Repairs must be paid infull prior to return to owner. Personal checks or VISA/MASTERCHARGE accepted. (If you pay by VISA or MASTERCHARGE, please give the account number and expirationdate.)

OBSOLETE EQUIPMENT. Beseler reserves the right to refuseto repair equipment that has been discontinued for five (5)years.

IN-WARRANTY SERVICE. There is no charge for service per-formed during the warranty period. PROOF OF PURCHASE isrequired for warranty service and must be enclosed with thereturn. Terms of the warranty are explained above.

Charles Beseler Company1600 Lower Road, Linden, N.J. 07036

590-01-38FX/593350SS