dsh-flash-gn

Choosing the right distance or aperture for a flash setup is a core part of exposure planning, yet mental math on Guide Numbers is easy to get wrong, especially when juggling ISO, f-stops, and multiple lights. The dsh-flash-gn plugin registers a single, focused tool that performs precise GN calculations from the parameters you supply and returns a detailed, step-by-step result you can verify at a glance. The entire implementation is pure Node.js with zero network calls, so it is fast, private, and fully offline. It is aimed at photographers, students, and creators who want to offload the arithmetic to a conversation instead of a calculator, and who prefer a lightweight, dependency-free utility that sits quietly in their toolset.