Blog
Articles on filmmaking technique, production planning, and industry knowledge.
Showing 9 of 9 posts
Zone Focusing for Filmmakers: How Street Photographers' Technique Translates to Run-and-Gun Video
Street photographers have used zone focusing for decades to capture decisive moments without a viewfinder. The same technique -- pre-setting focus to a calculated zone rather than tracking a subject -- is one of the most practical solutions for documentary, ENG, and solo-operator video work where manual focus-pulling is not possible.
Deep Focus vs. Shallow Focus: A Cinematographer's Decision Framework
Most writing on deep versus shallow focus treats it as an aesthetic preference. It is not -- it is a technical and narrative decision with specific trade-offs. This post covers the conditions under which each approach serves the story, the practical constraints that govern the choice, and how to calculate whether the intended look is achievable with your equipment.
Pulling Focus Without a Focus Puller: How Indie Films Manage DoF on Small Crews
A dedicated 1st AC pulling follow focus is the professional standard for a reason. When the budget or crew size makes that impossible, there are five practical focus strategies that indie and documentary productions use to keep shots sharp without a second set of hands on the lens.
What Circle of Confusion Value Should You Actually Use? A Sensor-by-Sensor Guide
Most DoF calculators pick a default circle of confusion value and never show it to you. Some default to 0.029mm for every camera regardless of sensor size. Others use 0.025mm for 'cinema' modes that span three different sensor formats. Here is how to find out what your app is actually using and whether it is correct.
Why Your Lens Markings and Your DoF Calculator Still Disagree (Breathing, T-Stops, and Diffraction)
Even with the correct circle of confusion set, a DoF calculator will give you a number your lens cannot quite deliver. Lens breathing changes the effective focal length as you focus closer. T-stops differ from f-numbers. And diffraction shrinks your sharp zone past f/8 on modern sensors. Here is what each factor contributes.
How to Use Hyperfocal Distance in the Real World (Not Just in Theory)
Hyperfocal distance is taught as a formula but used on set as a technique. This post covers the calculation, the practical focus distances for common lens and sensor combinations, and exactly when pulling to hyperfocal is the right call versus when it is a shortcut that costs you sharpness.
What Circle of Confusion Should You Use for Your Camera?
The circle of confusion value in your DoF calculator is sensor-format specific. Using the wrong CoC produces inaccurate depth of field predictions on set. Here is exactly which value to enter for every common cinema and mirrorless camera.
DoF Calculator vs. Lens Markings: Which to Trust on Set?
Lens barrel DoF markings were engraved for 35mm film standards that predate digital sensors. On most modern cinema and mirrorless cameras, those markings are optimistic by 30 to 50 percent. Here is how to know when to trust the glass and when to trust the calculator.
Depth of Field in Cinema: The Complete Practical Guide
A complete breakdown of how depth of field is calculated in cinema, how sensor size changes the math, and how to make confident focus decisions before the camera rolls.