NKD Focal Length Slider

Technical Camera Control: Focal Length Slider

This LoRA is designed specifically for Flux Klein 9B to provide granular control over the virtual lens focal length, allowing you to shift from ultra-wide vistas to compressed telephoto shots.

The Standout Feature: Composition Preservation Unlike standard prompting, this slider is highly composition-aware. When used—especially in img2img / edit mode—it maintains the original shapes and global contrast positions. Instead of generating a completely new image, it strictly alters the perspective distortion. It effectively mimics a physical "Dolly Zoom" (Vertigo effect), virtually moving the camera closer or further away to compensate for the focal length shift while keeping your subject anchored in the frame.

• Negative Values (Towards -5.0): Mimics Wide Angle lenses. Expands the field of view, increases peripheral perspective distortion, and pushes the background away.

• Positive Values (Towards +5.0): Mimics Telephoto/Long lenses. Flattens the perspective, isolates the subject, and compresses the background tightly.

• Extreme Values: You can push the weights beyond the ±5.0 limits for extreme or experimental distortions, though you may need to balance the prompt.

Known Behaviors & Pro-Tips (V2 in Progress)

Because this LoRA pushes the model's spatial understanding, there are two minor biases at higher strengths:

• Wide Angle Bias (-): Introduces a slight oversharpening effect.

• Telephoto Bias (+): Can result in a slight loss of global contrast.