What's your cropped field of view?

Like the FOV calculator, but applies a crop percentage to see the effective field and image scale on the cropped region.

Inputs

Telescope Preset

Camera Preset

Focal Length (mm)

Reducer / Barlow 1 = none, <1 = reducer, >1 = Barlow

Horizontal Pixels

Vertical Pixels

Pixel Size (µm)

Binning

Crop (%) Percentage of full frame kept (center crop)

Results

Adjust the inputs to see results.

Cropped pixels = full pixels × crop%. FOV and image scale recalculated on the cropped sensor dimensions.

All formulas verified by automated tests.