The Leitz 75mm f/2 APO-Summicron is a short telephoto prime for Leica rangefinder use, available in M-bayonet and R-mount SLR versions per the listed variants. Designed as a fast portrait-length optic, it sits between the 50mm and 90mm focal lengths and is favoured for tight head-and-shoulders work and selective-focus shooting.

Auction data for this model is thin: a single UK saleroom hammer result from 2015 shows the lens sold for £1,700, which gives a benchmark rather than a current median. With only one verified sale on file, today's worth in the auction market will depend heavily on variant (M versus R), cosmetic condition and glass cleanliness, and the price a clean copy sells for at hammer can move materially above or below that historical figure. Treat the £1,700 result as wholesale-level evidence — it is the hammer figure before commissions — and expect a wide value range until more recent data is captured.