What's the best body to adapt the Pentacon Prakticar 135mm f/2.8 MC onto?

Two strong destinations. First choice: a Canon RF body via a generic mechanical adapter ring (multiple vendors) preserves the most of the Prakticar 135 f/2.8 MC's native behaviour (autofocus, in-lens IS where present, electronic aperture). Second choice: a Canon FD body via a generic mechanical adapter ring (multiple vendors) — solid fallback when the first body family is unavailable. The /matrix and /picker pages let you compare every feasible adaptation side-by-side.

Will autofocus work when the Prakticar 135 f/2.8 MC is adapted onto another body?

No — adapters in our catalogue route the Prakticar 135 f/2.8 MC through a mechanical path on the best-supported body (Canon EF). Focus is fully manual; rely on the body's focus peaking and magnify-to-focus aids to nail focus.

Does the Prakticar 135 f/2.8 MC's in-lens image stabilization still work through an adapter?

The Prakticar 135 f/2.8 MC has no in-lens IS / VR / OS unit — there's no in-lens stabilisation to pass through. Bodies with IBIS (most modern mirrorless) still stabilise the captured frame, but stabilisation is body-side only.

Pentacon · Praktica B mount · Prime lens

Pentacon Prakticar 135mm f/2.8 MC — adapter compatibility and body matches

The Pentacon Prakticar 135mm f/2.8 MC sits on the Praktica B flange geometry (44.4 mm) — below is every body mount it adapts onto, the autofocus / IS / aperture-control level you should expect, and the specific adapter SKUs that ship the path.

Lens specifications

Manufacturer: Pentacon
Lens mount: Praktica B
Focal length: 135mm
Aperture: f/2.8 – f/32
Lens type: Prime
Image stabilization: No
Weight: 400 g
Filter thread: 55 mm
Released: 1980

Background & adapter context

The PB-system short tele — a classic 135 mm f/2.8 for adapted portrait and detail work on mirrorless. 55 mm filter, manual focus + aperture ring. On an APS-C body it reaches a ~200 mm-equivalent field of view; inexpensive and plentiful as East-German SLR kit thinned out.

Adapting the Prakticar 135 f/2.8 MC onto other bodies

Every feasible body-mount destination for a Praktica B lens, sorted by adapter feasibility. Curated adapter SKUs (linked below) cover the specific lens-side → body-side pairing — pick the row matching the body you own, then click the SKU for the full teardown.

Body mount	Result	Adapter examples	Caveats
Body mount Canon RF flange 20 mm	Mechanical MFno ISAp. ring	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Praktica B lens and Canon RF body.
Body mount Canon FD flange 42 mm	Mechanical MFno ISAp. ring	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Praktica B lens and Canon FD body.
Body mount Canon EF-M flange 18 mm	Mechanical MFno ISAp. ring1.5× crop	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Praktica B lens and Canon EF-M body.
Body mount Nikon Z flange 16 mm	Mechanical MFno ISAp. ring	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Praktica B lens and Nikon Z body.
Body mount Sony E (incl. FE) flange 18 mm	Mechanical MFno ISAp. ring	K&F Concept PB-NEX Fotodiox PB-NEX	Aperture is selected on the lens's own ring, but the Prakticar diaphragm is automatic — held open by a rear stop-down lever the camera normally actuates at exposure. A mirrorless adapter actuates nothing on its own, so most PB-NEX adapters include a built-in aperture-actuation wheel to press that lever; choose one over a bare ring, or an automatic Prakticar can sit stuck wide open. 26.4 mm flange clearance — comfortable adapter thickness.
Body mount Fujifilm X flange 17.7 mm	Mechanical MFno ISAp. ring1.5× crop	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Praktica B lens and Fujifilm X body.
Body mount Fujifilm GFX (G-mount) flange 26.7 mm	Mechanical MFno ISAp. ringvignettes	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Praktica B lens and Fujifilm GFX (G-mount) body.
Body mount Micro Four Thirds flange 19.25 mm	Mechanical MFno ISAp. ring2× crop	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Praktica B lens and Micro Four Thirds body.
Body mount L-Mount flange 20 mm	Mechanical MFno ISAp. ring	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Praktica B lens and L-Mount body.
Body mount Leica M flange 27.8 mm	Mechanical MFno ISAp. ring	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Praktica B lens and Leica M body.
Body mount Canon RF (cine) flange 20 mm	Mechanical MFno ISAp. ring	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Praktica B lens and Canon RF (cine) body.
Body mount C-mount flange 17.526 mm	Mechanical MFno ISAp. ring2.7× crop	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Praktica B lens and C-mount body.
Body mount Konica AR flange 40.5 mm	Mechanical MFno ISAp. ring	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Praktica B lens and Konica AR body.
Body mount Canon EF flange 44 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only 0.4 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Body mount Canon EF-S flange 44 mm	Speed booster MFIS lens-onlyAp. wheel1.5× crop	Speed Booster / focal-reducer family	Flange clearance is only 0.4 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Body mount Nikon F flange 46.5 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -2.1 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Body mount Sony A / Minolta A flange 44.5 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -0.1 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Body mount M42 (Pentax / Praktica screw mount) flange 45.46 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -1.1 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Body mount Pentax K flange 45.46 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -1.1 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Body mount PL (Positive Lock) flange 52 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -7.6 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Body mount Canon EF (cine) flange 44 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only 0.4 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Body mount Exakta flange 44.7 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -0.3 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Body mount T-mount (T2) flange 55 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -10.6 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Body mount Minolta SR / MC / MD flange 43.5 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only 0.9 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Body mount Olympus OM flange 46 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -1.6 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Body mount Contax/Yashica (C/Y) flange 45.5 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -1.1 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.

About the Praktica B mount

VEB Pentacon's East-German bayonet replacement for the M42 screw mount, introduced on the Praktica B 200 in 1979. Five electrical contacts in the flange pass open-aperture metering data, but the mount is mechanical for focus and aperture actuation. Native glass: Carl Zeiss Jena Prakticar (Pancolar, Flektogon, Sonnar) plus Pentacon-branded zooms. Production stopped in the early 1990s after the Treuhand wound up Pentacon. Praktica B lenses adapt to mirrorless bodies cleanly; the 44.4 mm flange leaves ample room for adapter thickness.

See every adapter that touches the Praktica B mount →

Common questions

What's the best body to adapt the Pentacon Prakticar 135mm f/2.8 MC onto?: Two strong destinations. First choice: a Canon RF body via a generic mechanical adapter ring (multiple vendors) preserves the most of the Prakticar 135 f/2.8 MC's native behaviour (autofocus, in-lens IS where present, electronic aperture). Second choice: a Canon FD body via a generic mechanical adapter ring (multiple vendors) — solid fallback when the first body family is unavailable. The /matrix and /picker pages let you compare every feasible adaptation side-by-side.
Will autofocus work when the Prakticar 135 f/2.8 MC is adapted onto another body?: No — adapters in our catalogue route the Prakticar 135 f/2.8 MC through a mechanical path on the best-supported body (Canon EF). Focus is fully manual; rely on the body's focus peaking and magnify-to-focus aids to nail focus.
Does the Prakticar 135 f/2.8 MC's in-lens image stabilization still work through an adapter?: The Prakticar 135 f/2.8 MC has no in-lens IS / VR / OS unit — there's no in-lens stabilisation to pass through. Bodies with IBIS (most modern mirrorless) still stabilise the captured frame, but stabilisation is body-side only.

Lens specifications

Background & adapter context

Adapting the Prakticar 135 f/2.8 MC onto other bodies

About the Praktica B mount

Common questions

Keep exploring