technique · 1 recipe
Split Diopter
A split-field close-up attachment focuses one image region nearer while the uncovered region retains a farther focus distance.
Selected recipe
Split Diopter
This is the default recipe for the Split-Field Diopter family.
Free short AI video prompt
A starter line you can copy. The full timed recipe, still-image and production prompts are on the shot card.
Prompt rule: Keep near and far subjects in separate tested optical regions simultaneously; align the transition with a motivated boundary and keep essential action away from it.
Split Diopter: A split-field close-up attachment focuses one image region nearer while the uncovered region retains a farther focus distance. Keep the subject readable; motivate camera and light.
Technique guide
- When to use
- Allow the telephone nearby on the left and the detective far on the right to be readable at the same time, preserving the psychological or informational relationship between the two.
- How it works
- First place the phone on the left and the detective on the right, using a secret door frame to arrange the division. Confirm separately that distant focus is not covered and that close focus with a lens attachment is tested before shooting, rather than guessing a general prescription. Characters only move within their own areas; if switching to compositing, make it clear that it is a dual-focus simulation from the same camera position and keep separate layers.
- Common mistakes
- The two rooms on the left and right are connected. When the character crosses the boundary, they suddenly split or the image alternates focus.
How to read this page
Split Diopter is one technique in Focus & Depth. The definition states the single mechanism the frame has to show. The technique guide covers when to use it, the steps, the usual mistakes, how it differs from the neighbors, and what a successful take looks like.
The clip above is one reading, made with a third-party video model. Another model, or the same model on another day, can land on a different frame. It is an example, not a promise that a prompt will match it.
The free short prompt is a starter sentence. The shot card is the timed recipe: scene, start and end frames, action, light, and color. Three sample cards are free on the site. The rest are part of GrokCine Pro. A second name for the same shot keeps its own URL and points back at this definition.
When you write a prompt, keep the one mechanism in the definition, then name the subject, the motion, and why the light is there. Do not stack a neighboring technique into the same sentence. If the name or the example is wrong, send this page's URL from the contact page.
Prompt versions
Same technique, different prompts. Version A is the latest prompt; older versions are the exact prompts that kept clips were made from. Each version shows every model that used it.
Version A · latest：Brass thimble in foreground · glove maker behind
Version A · Scene of this version (English, verbatim)
A copper thimble sits close on the left and a glove-maker in a dark apron sits far on the right, with a shelf upright on the dividing line inside a glove workshop.
The full prompt of every version comes with the member recipe.
sha256 3334523e02fa
Recipe
8 seconds · single take
In a glove workshop, a copper thimble sits on a shelf close to the lens on the left, and a glove-maker in a dark apron works far back on the right; a dark shelf upright runs down between them.
Shot cards
The full recipe for Split Diopter is a shot card
The full recipe for Split Diopter is a shot card. The start and end frames, timed action, lighting and color specs, a camera parameter table, copy-ready still-image and video prompts and negatives are open to GrokCine Pro members on the web.
Related families
- Deep Focus (Deep Depth of Field)
Deep Focus (Deep Depth of Field)Deep focus keeps a substantial continuous range of distances legibly sharp within one shot. - Shallow Focus (Shallow Depth of Field)
Shallow Focus (Shallow Depth of Field)Shallow focus restricts the sharp depth range around a chosen subject while nearer and farther distances become soft. - Rack Focus (Focus Pull)
Rack Focus (Focus Pull)A rack focus deliberately transfers sharpness between two distances during a continuous shot while the composition remains stable. - Bokeh
BokehBokeh describes the character of defocused detail, including highlight shape and transition edges, rather than merely shallow focus.
More in Focus & Depth
References
Sources we studied for this technique. External links; we don't embed them.
Articles & definitions
- Wikipedia: Split diopter
Wikipedia · Web
Half-lens close-up attachment: one side focused near, the other far; a blurred line where they meet.
Videos
- Daredevil: split diopter shots in the Netflix series
@SammyJReacts · 2025-03-10 · X
Daredevil Netflix series split-diopter shots.
Images & stills
- 404 films with split diopter shots, 1940–2020
@vashikoo · 2020-02-29 · X
Split diopter shots documented 1940–2020; none found from 1950s features.
- Star Trek: Discovery split diopter shot
@AdamRackoff · 2019-03-03 · X
Star Trek: Discovery — split-field diopter lets the lens focus on near and far at once.
- Brian De Palma's split diopter obsession
@C_R__11 · 2021-12-17 · X
Brian De Palma's obsession with split diopter shots.
- StudioBinder: How to use split diopter shots
@studiobinder · 2019-11-11 · X
StudioBinder guide: split diopter for information, character, tone.