You can now buy optical waist-level viewfinders for various camera models on Ebay and Aliexpress. The viewfinders have different frame lines (28mm/35mm/40mm/50mm), so make sure you pick the correct version (two different models are available): Optical waist-level viewfinders for Ricoh GR cameras Optical waist-level viewfinders for Leica cameras Via PentaxRumors No related posts.