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FishEyeV2.md

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Fish Eye Effects V2

A powerful and versatile lens effect node for ComfyUI that simulates various camera lens characteristics, from ultra-wide fisheye to telephoto effects. This node provides realistic lens distortion, depth of field effects, chromatic aberration, and vignetting.

Features

  • Multiple lens presets simulating real focal lengths
  • Switchable between regular lens distortion and fisheye projection
  • Customizable distortion strength
  • Depth-based focus effects
  • Chromatic aberration simulation
  • Bokeh blur for depth of field effects
  • Adjustable vignette strength

Lens Presets

The node includes several presets that simulate common camera focal lengths:

  • 14MM Ultra Wide: Extreme wide-angle with strong distortion and vignetting
  • 24MM Wide: Wide-angle with moderate distortion
  • 35MM Standard: Standard wide-angle with subtle distortion
  • 50MM Normal: Minimal distortion, closest to human vision
  • 85MM Portrait: Very subtle distortion, ideal for portraits
  • 100MM Telephoto: Minimal distortion with slight compression
  • 200MM Super Telephoto: Nearly distortion-free with subtle effects
  • Custom: Fully customizable settings

Parameters

Main Controls

  • Lens Preset: Choose from the predefined focal length presets
  • Fisheye Mode: Toggle between regular lens distortion and fisheye projection
    • When OFF: Uses polynomial distortion typical of regular lenses
    • When ON: Uses equidistant projection typical of fisheye lenses

Advanced Parameters

  • Custom Distortion (-1.0 to 1.0)

    • Adds or subtracts distortion from the preset value
    • Negative values create barrel distortion
    • Positive values create pincushion distortion
    • Default: 0.0

  • Focus Distance (0.1 to 10.0)

    • Controls the focal plane distance
    • Lower values focus closer to the camera
    • Higher values focus further away
    • Default: 1.0

  • Vignette Strength (0.0 to 1.0)

    • Controls the darkness of the corners
    • Adds to the preset's built-in vignette
    • Higher values create stronger darkening
    • Default: 0.0

  • Chromatic Aberration (0.0 to 0.02)

    • Simulates color fringing effects
    • Creates RGB channel separation
    • Higher values increase the effect
    • Default: 0.0

  • Bokeh Blur (0.0 to 1.0)

    • Creates depth-of-field blur
    • Works in conjunction with Focus Distance
    • Higher values increase blur strength
    • Default: 0.0

Usage Tips

  1. Start with a lens preset that matches your desired look
  2. Adjust the custom distortion to fine-tune the lens effect
  3. Use focus distance and bokeh blur together for depth effects
  4. Add chromatic aberration sparingly for vintage or artistic effects
  5. Fine-tune vignette strength to enhance the mood or draw attention to the center

Technical Details

  • Input: Accepts standard ComfyUI image tensors
  • Output: Returns processed image with applied lens effects
  • Processing: Maintains original image dimensions and aspect ratio
  • Color: Preserves color channels while applying effects