The Asahi Pentax Takumar 6x7 35mm f/4.5 Fisheye is an ultra-wide fisheye lens designed for the Pentax 6x7 medium-format SLR system. It produces a hemispherical image circle on 6x7 film and was intended for architectural, landscape and special-effects work where extreme angle of view is required.

Sales data is very limited, with one UK auction hammer result of £185 in January 2025 providing the only recent reference point for what this fisheye is worth at saleroom level. As of today, that single data point should be treated as indicative rather than a firm market median, and clean copies with original caps and case can reasonably be expected to sell for more than scruffy examples when they appear in the auction market.