- Better Than Explore – Make Photography Great Again!
- Carl Zeiss Sonnar
- Club Sonnar
- GALERIE night stars ★✩★✩★
- Green Green Green Things
- Industrial Horizons
- INDUSTRIAL LANDSCAPES & INDUSTRIAL STRUCTURES OLD AND NEW.
- M42
- Pentax birds
- Pentax K-5 Fan Club
- Polska/Poland
- Samyang 85mm 1,4
- Science, Technology, History
- The Light Fantastic
- Upper Silesia / Górny Śląsk
- Upper Silesian trails / Górnośląskim szlakiem 🏭