Things in Frame — Birding Distance & Depth of Field

Things in Frame

Field distance planner

Your field setup

Adjust composition and distance—the plan updates instantly.

Framing

Focal length

At a fixed distance, focal length changes the subject’s size in the frame. Sensor type and megapixels are set with the cropping results below.

Subject & composition

Subject average size

Planning averages: width or body length × approximate standing height. Individuals and posture vary.

Subject width across the frame

Subject height

What do you want to calculate?

Distance stays fixed; changing focal length changes the subject size in the frame.

Camera-to-subject distance

GPS distance

Your camera position

Text to parse

Paste decimal coordinates or a Google Maps link.

Subject position

Text to parse

Paste decimal coordinates or a Google Maps link.

Distance—

Parse both positions to calculate the distance between them.

400 mm · f/5.6 Drag subject to compose 35% of frame height

Depth of field

Green is the acceptable sharpness zone; orange marks the subject-depth reference.

Aperture

— total

Subject length

Near —Focus —Far —

Your field plan

Distance from the camera sensor plane.

Recommended subject distance

—m

Usable position range: — with a ±5% framing margin.

Height target —Width target —

Frame coverage

—

of frame height

Frame coverage

—

of frame width

Field of view

—

width × height

Cropping opportunity

Subject on sensor—estimated pixel bounding box

Pixels on subject—bounding-box megapixels

Tight crop potential—subject fills 80% of crop

This is a planning estimate. Leave extra room for wing movement and focus error.