Time Lapse Calculator

Creating a smooth time lapse requires coordinating four primary variables: capture interval, total recording time, clip length, and playback frame rate. The underlying logic relies on a few fundamental equations:

1. Number of Photos: Multiplying your desired final clip length (in seconds) by your target frames per second (fps) gives the exact total number of image frames required: Number of Photos = Clip Length * Frames Per Second.

2. Capture Interval: Dividing your total real-world recording time by the total number of photos determines how often your camera needs to click the shutter: Capture Interval = Total Recording Time / Number of Photos.

3. Memory Usage: Multiplying the total photo count by the average file size of each individual image yields your estimated storage requirement: Memory Usage = Image Size * Number of Photos.

Imagine you want to record a 2-hour sunset and compress it into a smooth 10-second video clip playing at 30 frames per second using a camera that produces 25MB RAW images. Let us walk through the calculations step by step:

Step 1: Determine total photos needed.
Using our formula, multiply the clip length by the frame rate: 10 seconds * 30 fps = 300 photos.

Step 2: Calculate the capture interval.
Convert your 2-hour recording time into seconds (2 hours * 3,600 seconds = 7,200 seconds). Divide by the total photo count: 7,200 seconds / 300 photos = 24 seconds. You must program your intervalometer to take a photo every 24 seconds.

Step 3: Estimate memory usage.
Multiply your photo count by the image file size: 300 photos * 25MB = 7,500MB, or approximately 7.5 GB of storage space.

Account for Buffer Time: When setting short capture intervals (such as 1 second or less), ensure your camera and SD card can write data fast enough to prevent buffer overruns.

Battery Life Management: Long recordings drain batteries quickly. Always calculate whether your battery capacity or external power setup can handle the total recording duration.

Use Manual Settings: Lock your white balance, focus, and exposure manually to avoid flickering between adjacent frames in your final video sequence.