25cm VFX Balls
25cm Single VFX Ball Half Mirror and Half Grey
The large split sphere for wide plates, on a 1/4 UNC thread
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25cm VFX Balls
Grey Ball HDRI VFX Ball With 3/8 UNC Thread
An 18% grey reference on a 3/8 UNC thread for HDRI work
This ball is fitted with a 3/8 UNC thread so it mounts to a tripod or a handle.
The grey side uses 50% grey paint with 18% reflectivity, which is the exposure anchor post production works from.
Balls are produced for film and television post production and the surface is finished through more than 20 processes.
Use: HDRI and exposure referenceGrey side: 50% grey paint, 18% reflectivityThread: 3/8 UNCSurface treatment: More than 20 processes
Key Benefits
- A known 18% surface makes exposure decisions repeatable
- 3/8 UNC mounts directly to grip stands and heavy heads
- The finish is built for post production accuracy, not display
- Pairs with any chrome ball in the range
Application Scenarios
- HDRI capture sessions
- Exposure reference for multi camera days
- Colour pipeline testing
- Lighting reference for CG environments
Who It Is For
- Colourists and DITs who need a fixed grey reference
- VFX vendors defining a capture standard
- Studios training new data wranglers
Problems It Solves
- Grey cards bend and shade differently from a sphere
- Grey surfaces with unknown reflectivity make the grade guesswork
- Threads that do not match the stand cost time on set
Technical Features
- 3/8 UNC thread for tripod or handle
- 50% grey paint with 18% reflectivity on the grey side
- More than 20 surface finishing processes
- Produced for film and television post production
- Grey scale tested over long term post production use
Specifications
| Use | HDRI and exposure reference |
|---|---|
| Grey side | 50% grey paint, 18% reflectivity |
| Thread | 3/8 UNC |
| Surface treatment | More than 20 processes |
| Ball diameter | 25 cm range |
| Supplied with | TBC |
| Net weight | TBC |
Values marked TBC are not published on the source material we work from and are confirmed in writing before an order is placed.
Materials
Painted grey reference surface at 18% reflectivity on a stainless steel sphere.
Manufacturing Process
The sphere is finished through more than 20 steps, the same sequence used on the mirror balls in the range.
Quality Control
The grey scale is checked against long term post production test results rather than a single bench measurement.
Certifications
We do not publish certification claims for this product. If your procurement process needs documentation, ask us before ordering and we will tell you exactly what we can supply.
Customization Options
Matched chrome spheres are available at 6cm, 12.6cm, 20cm, 25cm and 30cm.
Comparison With Other Products
A chrome ball records the environment. This grey ball records how that environment exposes, which is why most crews shoot both.
Use Guide
How Crews Work With This Product
- Mount the ball on a 3/8 UNC head at the subject position
- Expose for the grey surface with the same lens used for the plate
- Keep the ball out of direct flare from the key light
- Record the frame alongside the chrome ball capture
Related Products
Other Balls Crews Order With This One
25cm VFX Balls
10 Inch Chrome Grey Ball VFX Ball
In stock 10 inch reference ball with a handle and cloth cover
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12.6cm VFX Balls
12.6cm Half Mirror Half Grey Ball
A single 12.6cm sphere with a stretch handle for tight sets
View productRelated Reading
Guides That Cover This Product
Guide
Chrome Ball and Grey Ball Compared
A chrome ball records the environment, a grey ball records how that environment exposes. Why VFX crews shoot both and what 18 percent reflectivity means.
Read moreSolution
On Set HDRI Capture
A repeatable capture routine from call time to dispatch of the reference.
Read moreFAQ
Grey Ball HDRI VFX Ball With 3/8 UNC Thread FAQ
What reflectivity is the grey surface
It uses 50% grey paint with 18% reflectivity.
Which thread is fitted
A 3/8 UNC thread for mounting to a tripod or handle.
Why use a grey ball instead of a grey card
A sphere shows how light falls from every direction, not just the direction the card faces.
Do you supply a matching chrome ball
Yes. Chrome balls are made in the same size range and can be quoted together.
Quote the Grey Ball HDRI VFX Ball With 3/8 UNC Thread
Send the quantity and the delivery country and we will confirm price packing and dispatch window in writing.