How do I calculate the correct aperture for my flash?

You can use the `get_exposure_requirements` tool. Provide the Guide Number at ISO 100, the distance to your subject, and your target ISO to receive the required f-stop.

Can I calculate the effect of using half power?

Yes, use the `get_power_adjusted_gn` tool by providing the Guide Number at ISO 100 and setting the power fraction to 0.5.

What happens when I use multiple flashes at once?

When multiple flashes fire simultaneously, their light combines. Use `get_stacked_flash_gn` to find the total effective Guide Number based on the number of units used.

Flash Guide Number Calculator MCP Connector for Claude

A+

Calculate photographic exposure, power adjustments, and flash stacking requirements.

3 tools Official Updated Oct 1, 2026 Official Vinkius Partner

More Details Connect to Claude

This MCP server provides deterministic tools for photographic exposure calculations based on flash Guide Numbers (GN). It allows AI agents to calculate the required aperture using get_exposure_requirements, determine effective Guide Numbers at specific power levels with get_power_adjusted_gn, and calculate the combined light output of multiple units using get_stacked_flash_gn. It is designed to handle ISO sensitivity adjustments and the Inverse Square Law for precise flash photography planning.

flashexposureguide-numberphotography-mathaperture

Connect to Claude

Subscribe on Vinkius, then add this connector to Claude.ai or Claude Code.

① Claude.ai (web app)

Go to Settings → Connectors → Add custom connector
Paste the MCP endpoint URL below

https://edge.vinkius.com/vk_preview_LSdFcFLEoa53IQUsb2FHUV00d1EzQvhaDS06qfP0/mcp

② Claude Code (terminal)

claude mcp add --transport http flash-guide-number-calculator https://edge.vinkius.com/vk_preview_LSdFcFLEoa53IQUsb2FHUV00d1EzQvhaDS06qfP0/mcp

③ Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "flash-guide-number-calculator": {
      "url": "https://edge.vinkius.com/vk_preview_LSdFcFLEoa53IQUsb2FHUV00d1EzQvhaDS06qfP0/mcp"
    }
  }
}

Get full access on Vinkius

The preview token above works for testing. Powered by Vinkius.