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Photography Calculators
Explore ten free calculators for star trail exposure, field of view, depth of field, exposure settings, flash range, hyperfocal distance, ND filters, panoramas, print resolution, and reciprocity failure.
Showing 21 calculators
500 Rule Star Trail Shutter Speed CalculatorCalculate the longest shutter speed you can use before stars start trailing, using the 500 rule with your lens focal length and sensor crop factor.
Aperture Light Area Ratio CalculatorCalculate aperture light area ratio from first f-number, and second f-number with a transparent formula, worked example, and practical checks.
Camera Field of View CalculatorCalculate horizontal, vertical and diagonal field of view in degrees from focal length and sensor dimensions.
Crop Sensor Equivalent Focal Length CalculatorCalculate crop sensor equivalent focal length from lens focal length (mm), and sensor crop factor with a transparent formula, worked example, and practical ch.
Depth of Field CalculatorCalculate near limit, far limit and total depth of field from focal length, aperture, focus distance and sensor size.
Digital Image Megapixel CalculatorCalculate digital image megapixel from image width (pixels), and image height (pixels) with a transparent formula, worked example, and practical checks.
Exposure Triangle CalculatorFind the equivalent shutter speed when you change aperture or ISO, and see exactly how many stops of light each setting adds or removes.
Field of View CalculatorUse the Field of View Calculator. Enter Focal length (mm) and Sensor preset for a clear result, formula explanation, and practical planning checks.
Flash Guide Number CalculatorCalculate the aperture needed for a flash shot from its guide number and subject distance, plus a quick reference table across common apertures.
Flash Power Distance Adjustment CalculatorCalculate flash power distance adjustment from original flash power fraction, original distance (ft), and new distance (ft) with a transparent formula, worked.
Hyperfocal Distance CalculatorCalculate hyperfocal distance from focal length, aperture and sensor size, and find the near limit that keeps everything to infinity acceptably sharp.
Long Exposure Stop Increase CalculatorCalculate long exposure stop increase from starting exposure time (seconds), and additional stops with a transparent formula, worked example, and practical ch.
Macro Reproduction Ratio CalculatorCalculate macro reproduction ratio from subject image size on sensor (mm), and actual subject size (mm) with a transparent formula, worked example, and practi.
ND Filter Exposure Time CalculatorCalculate the correct new exposure time after adding a neutral density (ND) filter, from your base metered shutter speed and ND filter strength.
Panorama Field of View CalculatorCalculate the total field of view of a stitched panorama from your lens focal length, sensor width, number of shots and frame overlap.
Panorama Frame Count with Overlap CalculatorCalculate panorama frame count with overlap from total sweep angle (degrees), single-frame field of view (degrees), and overlap percentage with a transparent.
Print Resolution (DPI) CalculatorFind the pixel dimensions you need for a sharp print at any size and DPI, or check the maximum print size your current image supports.
Reciprocity Failure Exposure CalculatorCorrect long film exposures for reciprocity failure using the metered time and your film stock's reciprocity exponent.
Timelapse Clip Duration CalculatorCalculate timelapse clip duration from number of captured frames, and playback frame rate (fps) with a transparent formula, worked example, and practical chec.
Timelapse Frame Count by Interval CalculatorCalculate timelapse frame count by interval from capture duration (minutes), and interval (seconds) with a transparent formula, worked example, and practical.
Timelapse Photo Storage CalculatorCalculate timelapse photo storage from frame count, and average file size (mb) with a transparent formula, worked example, and practical checks.
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