The central trade-off
The Leica offers the famous M-system experience and a different lens ecosystem. The Canon P can offer satisfying tactile photography with screw-mount options. Compare finder condition, lens availability and actual service costs before comparing asking prices.
There is no universal winner. A camera is an interface between a person and a process. What matters is whether that interface matches your intended use and whether a specific surviving specimen can still deliver it.
Leica M3
Introduced in 1954, the M3 established the M system and an influential way of making 35mm photographs. Its lasting appeal is not just luxury; the viewfinder, controls and optical ecosystem form a coherent instrument.
Inspect bright-line viewfinder, rangefinder patch alignment, frame spacing, shutter curtains and the actual history of servicing.
Early and later bodies have meaningful mechanical differences. Cosmetic perfection cannot replace a proper CLA history.
Canon P
The Canon P offers much of the tactile pleasure of mid-century screw-mount rangefinders without needing to be a Leica. Its uncluttered body and broad lens possibilities appeal to photographers and collectors alike.
Check the rangefinder patch, shutter curtain wrinkles, viewfinder haze, frame lines and lens-thread condition.
A shutter that fires does not guarantee accurate timing, especially at slow speeds.
What changes the buying decision
Compare equivalent-condition examples only. Body-only listings, lens kits, shutter service, film backs, viewfinders and accessories can dramatically change the total. A recently serviced lower-prestige camera can be more useful than a famous but untested one.
Check whether film, batteries, processing and repairs are available for the kind of photography you want to make. If this will be a display object, originality and completeness may outweigh practical operating condition.
The next step
Read each dedicated dossier, then use the external completed-sale searches to understand current real-world transactions. Do not buy from a comparison headline alone.