Based on this product's specifications, here are some alternatives and similar models
Lens Voigtlander Super Nokton 29 mm f/0.8 for Micro Four Thirds
Summary description:
Voigtlander Super Nokton 29 mm f/0.8 is a manual-focus lens designed for Micro Four Thirds mirrorless cameras. With a 29 mm focal length and a very fast f/0.8 aperture, it is suited for low-light photography and shallow depth-of-field effects. The lens is intended for photographers seeking precise manual control, portrait and street use, and creative bokeh rendering.