Last Updated 2 hours ago
Overview
The Type 8142 is the fixed-focus 1 kW Molequartz scoop. Its 14-inch reflector delivers a field about 12.9 ft across at a 10 ft throw, with 120 fc at the centre. At 20 ft the same field spans 25.8 ft and the centre falls to 30 fc.
Key specifications
| Specification | Type 8142 |
|---|---|
| Maximum head load | 1,000 W, 8.3 A at 120 V |
| Reflector | 14-inch Molebrite Alzak aluminium scoop |
| Focus | Fixed |
| Socket | Medium prefocus, P28s |
| Size with standard diffuser clips | 17⅜ × 16 7/16 × 16¼ in. |
| Head weight with clips | 11 lb |
| Head weight with square holder | 13 lb |
Replacement lamps
| Lamp | Power | Voltage | Rated colour | Finish | Rated life |
|---|---|---|---|---|---|
| EGJ | 1,000 W | 120 V | 3,200 K | Clear | 300 h |
| EGK | 1,000 W | 120 V | 3,200 K | Frosted | 300 h |
| EGF | 750 W | 120 V | 3,200 K | Clear | 300 h |
| EGG | 750 W | 120 V | 3,000 K | Clear | 2000 h |
| EGC | 500 W | 120 V | 3,150 K | Clear | 500 h |
| EGE | 500 W | 120 V | 2,950 K | Clear | 2000 h |
The lamp table identifies EGJ as clear and EGK as frosted. The test caption calls its EGJ-Q1000/4/P frosted. The figures below follow the published chart. Check the finish on the actual globe when matching output.
Strengths and limitations
- The fixed field is repeatable. At 10 ft its half-intensity diameter is 12.9 ft.
- Coverage changes with throw. A tighter cut at the same hanging position requires flags or a different optical system.
Practical uses
In a small studio with a permanent pipe grid, this head can provide a repeatable wash over a standing mark or a section of backing. Measure from the lamp position to the subject plane before deciding how many heads the run needs.
Output and photometrics
The figures are centre-beam foot-candles. Field diameter is the width at approximately half the centre intensity. Mole tested the EGJ at 120 V. The table is for the fixed-focus head.
| Distance | Centre (fc) | Field diameter |
|---|---|---|
| 10 ft | 120 | 12.9 ft |
| 12 ft | 80 | 15.5 ft |
| 14 ft | 60 | 18 ft |
| 16 ft | 45 | 20.6 ft |
| 18 ft | 35 | 23.2 ft |
| 20 ft | 30 | 25.8 ft |
Photometric & exposure calculator
Estimate centre-beam illumination and the corresponding camera aperture from this fixture’s published measurements.
Estimated output
Select a configuration to calculate.
Manufacturer readings are for the stated optic, colour setting and full output, measured at the beam centre. Values between measured distances are interpolated. Point-source values outside those distances are approximate inverse-square estimates; large sources cannot be reliably extrapolated and are limited to their measured range. Exposure uses frame rate, shutter angle, ISO and the selected incident-meter calibration. Only the optics and diffusion explicitly listed in the measurement are included; additional modifiers, bounce, beam edges, ambient light, ND filters and camera exposure-index differences are not accounted for. Confirm critical exposures on set with a meter. Photometric source
Power and controls
The head is rated for 120/240 V AC or DC. The 1,000 W catalogued test lamp draws about 8.3 A at 120 V. Mole supplied the standard head with 36-inch leads and no switch. The optional 25 ft cable had an inline switch. Confirm the plug and lamp voltage on the unit being booked.
Optics and mounting
The standard Type 81485 diffuser clip ring takes material at the front. Mole also lists a Type 8145 square holder and a Type 81449 Molequik frame. For a baby stand, Mole specifies the Type 8143 strap-yoke adapter for a ⅝-inch spud.
Comparable fixture
The focusing version has the same reflector diameter and lets the operator tighten the field from the same hanging position. Mole-Richardson 14-Inch Focusing Scoop (Type 8141).
Field coverage and further reading
B&H gives the same 10 ft example as Mole, with 120 fc across a field whose half-intensity diameter is 12.9 ft. That diameter is useful when placing neighbouring scoops. B&H Type 8142 listing.
Rental and used-fixture checks
Confirm Type 8142 on the plate. Check the diffuser clips for even spring tension and inspect the prefocus socket for play. If the beam is lopsided, check the lamp seating before changing the hang.
Documentation
- Original Mole-Richardson specification and photometric sheet
- Mole-Richardson equipment catalogue
- Download the original scoop sheet
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