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The BlackJack
400 complements our compact line of Joker-Bug™ with a very
small clean Fresnel instrument capable of very wide, yet controllable,
beam patterns. The new design offers the versatility and compactness
that encompass the driving force behind K5600.
The typical design of a Fresnel lensed instrument consists of placing
the lamp (light source) at (or very near to) the focal point of
the lens to achieve a "SPOT". This being the furthest
point from the lens, typically the fixture housing is designed around
this maximum distance. Our design allows us to shrink such fixture
by at least one third in depth. We basically devised a variable
geometry unit in which the overall housing has been split in two
collapsible parts.
The Drop-in Fresnel lenses are removable allowing quick access to
the popular "Open Eye" (no lens) sharp shadow projection
mode. Two Fresnels are offered: a Soft (74 x 25 degrees beam patterns)
and a Spot (44 x 6 degrees). Precise lamp and reflector positioning
insure a clean light and shadow quality. Double shadowing has been
eliminated in either mode.
The Barndoor for such a wide beam system had to be completely re-thought
and the proposed version behaves more like miniature flags capable
of reaching far past the lens in front or back of it. The front
end is outfitted with special plugs made to receive Chimera poles.
The Back Cover of the unit supports: all the ignition electronics,
the lamp, its socket and its reflector, reducing maintenance intervention
as well as down time. It can also be replaced by tungsten back converting
the unit into 600W, 3200Kelvin.
SPECIFICATIONS
* MAIN HOUSING: Aluminum casting, high temperature black epoxy.
This housing is made of two interlocking sliding parts. The front
ring supports the lenses and accessories holders as well as pole
plugs for lightbanks. The Back Cover supports the striker compartment,
the lamp cradle, the mirror and the safety switch. The back cover
is mounted on hinges for ease of maintenance or replacement by the
Tungsten back option.
* Mirror: Specular spherical. Aluminum 90% reflectance electrolytically
coated.
* Focusing: By means of a rack and pinion system acuated by the
side knob.
* Safety Glass: Borosilicate UV Filter tempered.
* Yoke: 5/8" Baby size. Tubing black epoxy finish. Connection
to stand allows three axis positioning. Ratchet handle applies very
firm pressure to disk brake.
* Lamp: MSR 400-HR, 5600 Kelvin, 600 hours life.
* Power Supply: Electronic, square wave flicker free. AC input:
90-132 Volt or by sliding selector switch: 180-265V. 50-60Hz. Dual
function ON/OFF push button switch. Completely silent (convection
cooled).
* Connectors: Molded Veam quarter turn quick locking.
* Extension Cable: 25 feet, 8 feet attached to the head.
* Accessory size: 6 1/2" – 6 5/8"
* Accessories: Barndoor, Tungsten Back, Scrims.
* Tungsten Lamp: FRG = 500W 110V, FRK = 500W 220V
Note: BlackJack and related accessories are under "Patent Pending"
status.
PHOTOMETRICS
| Distance
in Feet |
Foot
Candles |
| Fresnel
Spot Lens |
Flood
44°
|
Spot
6°
|
| 3' |
2,224 |
23,224 |
| 6' |
556 |
5806 |
| 10' |
200 |
2090 |
| 15' |
89 |
929 |
| 20' |
50 |
523 |
| 25' |
32 |
334 |
| 30' |
22 |
232 |
| 35' |
16 |
171 |
| 40' |
13 |
131 |
| Fresnel
Wide Lens |
Flood
74°
|
Spot
25 °
|
| 3' |
1,576 |
4,168 |
| 6' |
394 |
1,042 |
| 10' |
142 |
375 |
| 15' |
63 |
167 |
| 20' |
35 |
94 |
| 25' |
23 |
60 |
| 30' |
16 |
42 |
| 35' |
12 |
31 |
| 40' |
9 |
23 |
| Open
Eye (No Lens) |
105°
|
|
| 3' |
856 |
|
| 6' |
214 |
|
| 10' |
77 |
|
| 15' |
34 |
|
| 20' |
19 |
|
| 25' |
12 |
|
| 30' |
9 |
|
| 35' |
6 |
|
| 40' |
5 |
|
Note:
f Stop indicated here are based on Exposure Index of 400 ASA and
Exposure Time of 1/50 seconds.
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