I have a third-party electronic flash. Can I use it on the E-P1?Flash units that are not part of the Olympus E-System may pose problems if used on the E-P1.Thyristor-type flash units can be used with the E-P1s Manual shooting mode as long as the sync voltage does not exceed 6.5 VDC. Third-party TTL flash units will not have TTL capability but possibly may be usedwith Manual exposure control. Olympus can only guarantee the operation of Olympus flash units.Testing the Voltage of Vintage Flash UnitsAvoltmeter, or digital multimeter, can be used to test the voltage of a vintage flash unit. To measure voltage, turn on the flash unit and allow it fully charge. Then, measure the voltage between the positive contact and the negative one on the hot-shoe of the flash unit. The positive contact should be the center pin and the negative contact is generally a small, recessed, metal square along the edge.

Achiever 115 A/S: 3.9-10.6 volt Achiever 115 M: 64 volt Achiever 260AF: 3 volt Achiever 260T: 253 volt Achiever 321AZ: 298 volt Achiever 360LCD: 4.5 volt Achiever 632LCD: 4.0-5.6 volt Achiever 828: 250 volt Achiever DZ260: 3.4 volt Achiever DZ265: 5 volt Achiever TZ250: -8.5 voltReverse polarity Agfatronic 165: 247 volt Agfatronic 201B: 80-240 volt Agfatronic 221CB: 230 volt Agfatronic 222CS: 198 volt Agfatronic 240B: 238 volt Agfatronic 261CB: 64 volt Agfatronic 280CB: 29.6 volt Agfatronic 280VB: 50 volt Agfatronic 2A: 210 volt Agfatronic 301CB: 240 volt Agfatronic 302CSI: 6.2 volt Agfatronic 320CA: 170 volt Agfatronic 320CBS: 160-250 volt Agfatronic 341CA: 238 volt Agfatronic 343CS: 6.5 volt Agfatronic 383CS: 6.6-11.5 volt Agfatronic 401BCS: 212 volt Agfatronic 643CS: 6.7 volt Aico Auto Pro 38: 202 volt Albinar 100 MDT-Twin: 3 volt Albinar 90 MDT: 3.2 volt Argus Automatic 9138: 270 volt Armatar 90 MDT: 10 volt Balcar Super A2400: -202 voltReverse polarity Bauer E218B: 230 volt Bauer E336 ABS: 227 volt Bauer E428 ABS: 267 volt Bauer E528 AB: 253 volt Bauer Ultrablitz 38 Logic: 8.4 volt Berotron 2500D: 5 volt Berotron 3000AF: 6 volt Bilora D140 RF: < 6 volt Blacks CB 32: 64 volt Blacks DM360BT: 4 volt Blacks DZ 40: 8 volt Blacks DZ 80: -8.5 voltReverse polarity Blacks TDZ 120: 2.6-4.4 volt Boots 1600: 43 volt Bower SFD35: (same?)Your marginal call6.3V, measured byTom Crowning

34 AF/CYes4.47V, measured by Oliver Karstens

CX40Yes4.3-5.2V, also per Tom Crowning

MD 34SYes5.92V, measued by Michael Neuhaus

DC36Yes2.52V, also by Frank Gaehler

Digislave2000No200V measured by Rich Scarlet

3000Yes7V measured by Rich Scarlet

DynaliteAnyIffy?10V (EOS FAQ)

Elinchrom(various)Your Call9V these days, but back over 20 years they ran as high as 30V, according to Elinchrom Customer Service via Tony Wu

FalconEyesDE 250Your Call...-14.5V, center negative; measuered by Martin Srenson,who had no luck firing it from a 300D

FujiGAYes3.52V, reported byEJ Haas

FLMX29No216V, measured by"Tom on AOL"

GMIInfrared transmitterNo324V, measured by Sandy Levenberg(just for IR?)

HanimexTZ*2No225V measured by Simon Heath

TZ36Yes4.6V measured by David Cox

TX325Yes3V measured by Ulrich H&omlu;xterman

CX440No180V measured by "Dave L"

Pro 550No234V measured by R. Prieto

TZ755CPYes4.5V measured by Mike Mahoney

TS855No209V measured by Jonathom Holtom

tZ2500No196V measured by Alastair Cardwell

HenselContra 500Your Call16.3V @10microAmps for all output ranges, as measured and reported by Jan de Vreij Dwingeloo

Super Miniflash 500No41.2V per "Mike from Germany"

2-channel IR triggerYour Call17V per Teemu Virtanen

HitaconMiniNo190V measured byBigWaveDave

Holgon2800 HCYes~5.4V measured by Whay Lee

HoneywellAuto Strobolite 52No115V as measured and reported by Karl Haug

Strobonar 892SYesA tiny 1.25V (!?), measured by Neil Viglione(who had to reverse the shoe polarity)

IkeliteSubstrobe 50Yes5.28V from Harold Kroeker

Substrobe DS-125Yes5.14V, also from Harold Kroeker

ImageCBD-30Yes2.9V, measured byRay Watson

CZ-65No201V from Dave Stacey

CBZ-2500Yes3V from "Kelvin"

Itorex3000TwYour Call...23V, reported by Asle Feten

Jessop220TBZNo212V measured by David Aldred

280ABZNo70V measured by "TomCee" Cramer,249V from Mark Butler

Kakonet4500No210V measured by Aapo Tammisto

Kalimar171ANo238V measured by Ted Coffey

175AYour Call4-5V measured by Michael Meissner,but183Vmeasured by Derek Misener...

TW-3600Yes5.71V measured by Tom Altman

KenlockTV45Your call10V measured by Barry Maufe

Kitstar50BCNo160V measured by Greg Bloor

KMartPro-700No229V measured byBob Rinelli

KodakGear AutoNo222.1V, measured by Steve Spartz

80030 (made by Tiffen)No235.6V, measured by Jim Gatling

KonicaHexar HX-14Yes5.89V, reported byEJ Haas

Hexar HX-18WYour Call8.4V measured by Craig Schroeder

LeicaCFYour Call10-11V measured byJoe Lim

LumedyneAllYour call12V since 1992, about 100V before, reportedDirect from Lumedyne(see sidebar below)

Luxon132 AFcYes1.23V(!) measured by Tarmo Pekola

Metz20 B3Nope168V reported by Gerardo Nieto

20BC4No185V reported by Gran Samuelsson

20BC-6Yes