Zeus Specifications


ZEUS Flash Heads: FLASH DURATION
Flash Head Single Head
at 2,500 True Ws
Single Head
at 1,875 True Ws
Single Head
at 625 True Ws
ZRM1 1/600 second (t.5)
1/200 second (t.1)
1/800 second (t.5)
1/270 second (t.1)
1/1600 second (t.5)
1/625 second (t.1)
Z2500SH 1/900 second (t.5)
1/260 second (t.1)
1/1100 second (t.5)
1/350 second (t.1)
1/2200 second (t.5)
1/770 second (t.1)


ZEUS Bi-Tube Flash Head: FLASH DURATION
5,000 True Ws –
connected to two Z2500 Power Packs
2,500 True Ws –
connected to both outlets of a Z2500 Power Pack
1,250 True Ws –
connected to both outlets of a Z1250 Power Pack
1/1200 second (t.5)
1/350 second (t.1)
1/2000 second (t.5)
1/600 second (t.1)
1/3000 second (t.5)
1/900 second (t.1)


ZEUS Flash Heads: Maximum INPUT POWER and CONTINUOUS USAGE
Flash Head Maximum
INPUT POWER
Maximum
CONTINUOUS USAGE
ZRM1 2,500 True Ws at 700 Volts (with the Z2500 pack) 20,000 Ws per minute
Z2500SH 2,500 True Ws at 700 Volts (with the Z2500 pack) 30,000 Ws per minute
Z2500BTH 5,000 True Ws at 700 Volts (with two Z2500 packs) 30,000 Ws per minute


ZEUS Power Packs: RECYCLE TIMES
Power Pack Total RECYCLE TIME
To FULL POWER
Applied WATTSECONDS
To FLASH HEAD
Z1250 Power Pack (1,250 True Ws) 1.2 seconds to Full Power 1,250 True Ws (FULL distribution)
0.35 seconds to Full Power 312 True Ws (1/4 distribution)
Z2500 Power Pack (2,500 True Ws) 2.4 seconds to Full Power 2,500 True Ws (FULL distribution)
0.7 seconds to Full Power 625 True Ws (1/4 distribution)


Maximum Continuous Usage: The maximum continuous usage rating dictates the practical usage limit. For example, if a Z2500SH Standard Head is connected to a Z2500 pack (in either the A or B socket) with the full power distributed to the one head and the flashpower adjustment slider at the full position, the head would be set to flash at its maximum power input level of 2,500 Ws. To stay within the maximum continuous usage guideline, the head should only be fired 12 times per minute (12 x 2,500 True Ws = 30,000 True Ws) at these settings.

The maximum continuous usage rating for both the Z1250 and Z2500 power packs is also 30,000 Ws per minute. With the Zeus Z2500 power pack (at 2,500 Ws), the maximum recommended usage rate is 12 shots per minute (1 shot per 5 seconds on a continuous basis). With the Zeus Z1250 power pack (at 1,250 Ws), the maximum recommended usage rate is 24 shots per minute (1 shot per 2.5 seconds on a continuous basis). Please note that these are preliminary estimates of maximum continuous usage, to be updated with more testing.

Recycle: The recycle specifications are measured as the total time needed by the unit to recycle to full power (with the flashpower adjustment slider on the power pack at the full position). The recycle time is proportionately faster at reduced power settings.

The ZEUS POWER PACKS and FLASH HEADS: Expected Output

ZEUS Z2500 (2500 True Wattseconds): approximate f-stop output for heads with standard 80° reflector or RingMaster head with standard reflector, at 10' - ISO100
1 Flash Head (plugged into A or B)
Power Distribution Switch: FULL
Flashpower Adjustment
Slider Position
Output
(True Wattseconds)
Output
(f-stops)
Full 2500 Ws f32 + 2/10
- 1 f-stop (1/2 Power) 1250 Ws f22 + 2/10
- 2 f-stops (1/4 Power) 625 Ws f16 + 2/10
- 3 f-stops (1/8 Power) 313 Ws f11 + 2/10
- 4 f-stops (1/16 Power) 156 Ws f8 + 2/10
- 5 f-stops (1/32 Power) 78.1 Ws f5.6 + 2/10


With two flash heads connected, output is for each head metered separately. The combined output of both heads will be approximately the same f-value as the single flash-head chart at top if both heads are in the same position and aimed at the same subject.


Flash Head (plugged into A)
Power Distribution Switch: FULL
1 Flash Head (plugged into B)
Power Distribution Switch: FULL
Slider Position Output
(True Ws)
Output
(f-stops)
Slider Position Output
(True Ws)
Output
(f-stops)
Full 1250 Ws f22 + 2/10 Full 1250 Ws f22 + 2/10
-1 (1/2) 625 Ws f16 + 2/10 -1 (1/2) 625 Ws f16 + 2/10
-2 (1/4) 312.5 Ws f11 + 2/10 -2 (1/4) 312.5 Ws f11 + 2/10
-3 (1/8) 156.25 Ws f8 + 2/10 -3 (1/8) 156.25 Ws f8 + 2/10
-4 (1/16) 78.125 Ws f5.6 + 2/10 -4 (1/16) 78.125 Ws f5.6 + 2/10
-5 (1/32) 39.063 Ws f4.0 + 2/10 -5 (1/32) 39.063 Ws f4.0 + 2/10


1 Flash Head (plugged into A)
Power Distribution Switch: 3/4
1 Flash Head (plugged into B)
Power Distribution Switch: 1/4
Slider Position Output
(True Ws)
Output
(f-stops)
Slider Position Output
(True Ws)
Output
(f-stops)
Full 1875 Ws f22 + 8/10 Full 625 Ws f16 + 2/10
-1 (1/2) 937.5 Ws f16 + 8/10 -1 (1/2) 312.5 Ws f11 + 2/10
-2 (1/4) 468.75 Ws f11 + 8/10 -2 (1/4) 156.25 Ws f8 + 2/10
-3 (1/8) 234.38 Ws f8 + 8/10 -3 (1/8) 78.125 Ws f5.6 + 2/10
-4 (1/16) 117.19 Ws f5.6 + 8/10 -4 (1/16) 39.063 Ws f4.0 + 2/10
-5 (1/32) 58.594 Ws f4.0 + 8/10 -5 (1/32) 19.513 Ws f2.8 + 2/10


Test Conditions: Z2500 Power Pack with Z2500SH Standard Flash Head (with standard 80º reflector) at 10-feet, ISO 100

These are predicted readings with the ZEUS Z2500 Power Pack (2500 True Wattseconds) at the various power settings. All readings for the ZEUS Z1250 Power Pack (1250 True Wattseconds) will be one f-stop lower. Please note that readings taken in other environments, with other accessories and / or with various brands of flashmeters may vary.