25cm Half Chrome Half Grey Ball HDRI Ball 10” 50/50 Chrome and Grey VFX Ball
A 25 cm diameter VFX HDRI reference ball split evenly into chrome and grey halves, designed for film and television lighting reference. The chrome side provides a full specular reflection, while the grey side has 18% reflectivity for accurate light measurement. The ball is mounted on a telescopic handle that extends from 22 cm to 47 cm, with a 3/8 UNC thread for tripod or handle attachment. All surfaces are processed through more than 20 steps to maintain a flawless specular finish.
Key Benefits
- 50/50 chrome and grey split provides accurate light reflection and measurement in post production
- 18% reflectivity grey side meets professional VFX standards tested in real scene conditions
- Telescopic handle extends from 22 cm to 47 cm for flexible positioning in studio or on location
- 3/8 UNC thread allows direct mounting to tripods, stands, or handles without extra adapters
- More than 20 surface treatment steps ensure no micro-scratches or finish degradation
- Split design allows one ball to serve both reflection and grey scale reference needs
Problems It Solves
- Inconsistent lighting reference when using painted or uncalibrated balls
- Need to carry multiple reference tools when one ball can serve both chrome and grey functions
- Difficulty in mounting a reflective sphere on a tripod without a standard thread
- Scratches or finish degradation from repeated handling or transport
- Lack of accurate 18% grey reflectivity in low-cost VFX reference balls
- Fixed-length handles that limit positioning flexibility on set
Application Scenarios
Lighting reference in film and television production studios for HDR and lighting setup
On-set calibration of camera exposure and white balance using the grey side
Post production lighting matching where the chrome side captures the full environment
VFX previsualization using the HDRI ball to simulate real-world lighting conditions
Studio photography where accurate light direction and intensity need to be recorded
On-location shooting where a portable, durable reference ball is needed for consistent results
Who It Is For
- VFX and post production teams needing accurate HDRI reference data
- Film and television cinematographers setting up lighting rigs on set
- Studio photographers requiring consistent light measurement across shots
- Lighting designers testing exposure and reflection in controlled environments
- Camera operators and grip crews who need a reliable, portable reference tool
- Production houses sourcing consistent VFX tools for multiple projects
Technical Features
- 25 cm diameter hollow stainless steel sphere with a 50/50 chrome and grey split
- Chrome side mirror polished to maintain specular reflection without distortion
- Grey side painted with 18% reflectivity material for professional light measurement
- 3/8 UNC thread machined into the top for tripod or handle mounting
- Telescopic handle extends from 22 cm to 47 cm for adjustable height
- More than 20 surface treatment steps including polishing, coating, and inspection
- Split line precisely aligned to ensure even distribution of chrome and grey
- All components assembled and tested before packing
Specifications and Materials
| Diameter | 25 cm |
|---|---|
| Material | Stainless steel |
| Finish | Chrome mirror polish, 18% reflectivity grey paint |
| Split Ratio | 50% chrome, 50% grey |
| Thread Type | 3/8 UNC |
| Handle Length | 22 cm to 47 cm telescopic |
| Surface Treatment | More than 20 processes to maintain specular reflection |
| Packing | Soft foam plastic inside, strong wooden case outside |
| Payment Terms | T/T, 50% deposit and 50% balance before shipping |
| Place of Origin | Shenzhen, China |
Materials
- Stainless steel, used for the hollow sphere body to maintain durability and reflectivity
- Chrome mirror polish, applied to one half for full specular reflection
- 18% reflectivity grey paint, tested and calibrated for professional VFX use
Customization
- Custom diameter available upon request, not limited to 25 cm
- Alternative thread types available, including 1/4 inch or 5/8 inch
- Handle length or material can be adjusted for different use cases
- Grey reflectivity level can be adjusted if needed for specific calibration
- Multiple sets can be batched with consistent finish and alignment
How It Is Made
- Step 1Stainless steel sheet cut and blanked to the required diameter
- Step 2Sphere formed using stamping press and seam welded into a closed hemisphere
- Step 3One half polished to mirror chrome finish, the other painted with 18% grey reflectivity
- Step 4Split line aligned and sealed to prevent paint bleed
- Step 53/8 UNC thread machined into the top of the sphere
- Step 6Telescopic handle assembled and tested for smooth extension
- Step 7All components inspected for surface quality and alignment
- Step 8Protective film applied, foam wrapped, and packed in a wooden case
Quality Control and Use
Quality Control
- Chrome and grey sides checked under angled light for even coverage and no paint bleed
- Thread inspected for pitch and depth using standard gauges
- Handle extension tested for smooth operation and locking stability
- Final assembly checked for alignment and secure mounting
- Photographs of the finished ball sent for approval before shipping
Use Guide
- Use the chrome side to capture full environmental lighting for HDRI generation
- Use the grey side to measure exposure and white balance in the scene
- Extend the telescopic handle to position the ball at eye level or above
- Mount the ball directly on a tripod using the 3/8 UNC thread
- Keep the protective film on until the ball is in position and the set is clean
- Clean with a soft cloth and water only; avoid abrasive cleaners or brushes
Compared With The Alternatives
| Alternative | How this product compares |
|---|---|
| Single chrome ball | One ball serves both reflection and grey scale reference, reducing the need for multiple tools |
| Painted grey ball | 18% reflectivity is calibrated and tested, not estimated, for professional accuracy |
| Plastic VFX ball | Stainless steel resists dents and scratches, lasts longer in repeated use |
| Unthreaded ball | 3/8 UNC thread allows direct mounting without extra adapters or clamps |
Related Products
Guides That Help You Specify This
How to Choose Wall Thickness for a Stainless Steel Sphere
What 1 mm, 2 mm and 6 mm walls actually change, and why thickness is a handling decision more than a strength one.
What a VFX HDRI Chrome and Grey Ball Set Is Used For
Why a reference ball is a measuring instrument, which diameters crews actually buy, and what separates a production ball from a garden ornament.
Questions About 25cm Half Chrome Half Grey Ball HDRI Ball 10” 50/50 Chrome and Grey VFX Ball
What is the reflectivity of the grey side?
18% reflectivity, calibrated for professional VFX and lighting measurement.
Can I get a different diameter?
Yes, custom diameters are available beyond 25 cm, subject to tooling and lead time.
Is the thread standard?
Yes, 3/8 UNC thread is standard. Other thread types can be requested.
How is the split line made?
The split is precisely aligned and sealed to prevent paint bleed between the chrome and grey halves.
How long does delivery take?
20 to 30 days after deposit received, depending on production schedule.
Can I buy just one half?
No, the set includes both the chrome and grey halves, the handle, and base components as standard.
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