ZEUS SPECIFICATIONS
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ZEUS Flash Heads: FLASH DURATION |
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Flash Head |
Single Head at 2,500 True Ws |
Single Head at 1,875 True Ws |
Single Head at 625 True Ws |
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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) |
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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) |
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ZEUS Bi-Tube Flash Head: FLASH DURATION |
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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 |
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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) |
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ZEUS Flash Heads: Maximum INPUT POWER and CONTINUOUS USAGE |
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Flash Head |
Maximum INPUT POWER |
Maximum CONTINUOUS USAGE |
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ZRM1 |
2,500 True Ws at 700 Volts (with the Z2500 pack) |
20,000 Ws per minute |
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Z2500SH |
2,500 True Ws at 700 Volts (with the Z2500 pack) |
30,000 Ws per minute |
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Z2500BTH |
5,000 True Ws at 700 Volts (with two Z2500 packs) |
30,000 Ws per minute |
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ZEUS Power Packs: RECYCLE TIMES |
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Power Pack |
Total RECYCLE TIME To FULL POWER |
Applied WATTSECONDS To FLASH HEAD |
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Z1250 Power Pack (1,250 True Ws) |
1.2 seconds to Full Power |
1,250 True Ws (FULL distribution) |
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0.35 seconds to Full Power |
312 True Ws (1/4 distribution) |
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Z2500 Power Pack (2,500 True Ws) |
2.4 seconds to Full Power |
2,500 True Ws (FULL distribution) |
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0.7 seconds to Full Power |
625 True Ws (1/4 distribution) |
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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
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1 Flash Head (plugged into A or B) Power Distribution Switch: FULL |
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Flashpower Adjustment Slider Position |
Output (True Wattseconds) |
Output (f-stops) |
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Full |
2500 Ws |
f45 |
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- 1 f-stop (1/2 Power) |
1250 Ws |
f32 |
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- 2 f-stops (1/4 Power) |
625 Ws |
f22 |
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- 3 f-stops (1/8 Power) |
312.5 Ws |
f16 |
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- 4 f-stops (1/16 Power) |
156.25 Ws |
f11 |
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- 5 f-stops (1/32 Power) |
78.125 Ws |
f8 |
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.
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1 Flash Head (plugged into A) Power Distribution Switch: FULL |
1 Flash Head (plugged into B) Power Distribution Switch: FULL |
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Slider Position |
Output (True Ws) |
Output (f-stops) |
Slider Position |
Output (True Ws) |
Output (f-stops) |
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Full |
1250 Ws |
f32 |
Full |
1250 Ws |
f32 |
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-1 (1/2) |
625 Ws |
f22 |
-1 (1/2) |
625 Ws |
f22 |
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-2 (1/4) |
312.5 Ws |
f16 |
-2 (1/4) |
312.5 Ws |
f16 |
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-3 (1/8) |
156.25 Ws |
f11 |
-3 (1/8) |
156.25 Ws |
f11 |
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-4 (1/16) |
78.125 Ws |
f8 |
-4 (1/16) |
78.125 Ws |
f8 |
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-5 (1/32) |
39.0625 Ws |
f5.6 |
-5 (1/32) |
39.0625 Ws |
f5.6 |
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1 Flash Head (plugged into A) Power Distribution Switch: 3/4 |
1 Flash Head (plugged into B) Power Distribution Switch: 1/4 |
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Slider Position |
Output (True Ws) |
Output (f-stops) |
Slider Position |
Output (True Ws) |
Output (f-stops) |
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Full |
1875 Ws |
f32 + 6/10 |
Full |
625 Ws |
f16 |
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-1 (1/2) |
937.5 Ws |
f22 + 6/10 |
-1 (1/2) |
312.5 Ws |
f11 |
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-2 (1/4) |
468.75 Ws |
f16 + 6/10 |
-2 (1/4) |
156.25 Ws |
f8 |
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-3 (1/8) |
234.375 Ws |
f11 + 6/10 |
-3 (1/8) |
78.125 Ws |
f5.6 |
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-4 (1/16) |
117.1875 Ws |
f8 + 6/10 |
-4 (1/16) |
39.0625 Ws |
f4 |
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-5 (1/32) |
58.59375 Ws |
f5.6 +6/10 |
-5 (1/32) |
19.53125 Ws |
f2.8 |
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.