Which adapter do I need for my body and lens?
Two modes. Pick a body and a lens to see whether the combination is native, mechanical, focal-reducer-required, or not adaptable — plus recommended adapter SKUs, autofocus level, IS pass-through, and the known caveats. Or flip it: pick only a lens to see every body mount in the dataset ranked by feasibility tier.
Try a popular combination
Pick a body mount and a lens mount to see the recommended adapter path. All 729 mount combinations are computed in your browser — no network round-trip, no tracking.
How the picker decides
Each combination is computed from the flange focal distance of the two mounts. A mechanical adapter needs at least 2 mm of flange clearance; less than that but within 12 mm is the range where a focal-reducer (Speed Booster) can correct infinity focus. A mirrorless lens cannot be mounted onto a DSLR body because the rear element would collide with the mirror box. Curated overrides layer on top for documented smart-adapter SKUs (Canon EF-EOS R, Nikon FTZ II, Sony LA-EA5, Sigma MC-11 and MC-21, Metabones EF-E, Viltrox EF-EOS R, Fringer EF-FX and EF-GFX, Voigtländer M-mount, Techart LM-EA9, and others).
Picker FAQ
- Why does the picker mark some combinations as “not adaptable”?
- Two cases. First, mirrorless lenses cannot be mounted onto DSLR bodies because the lens is designed for a flange focal distance shorter than the body's mirror box, so the rear element would collide with the mirror. Second, when the lens mount's flange is longer than the body's by more than about 12 mm, no commercially available focal reducer (Speed Booster) has enough correction range to restore infinity focus. In both cases the picker filters the combination out rather than recommending a workaround that won't reach focus.
- What's the difference between a mechanical adapter and a Speed Booster?
- A mechanical adapter is a machined-metal spacer at the correct flange distance — no glass, no electronics in the simplest variants. Field of view and exposure stay the same as the lens would deliver on its native body. A Speed Booster (Metabones, Viltrox, Mitakon, etc.) contains a focal-reducer element that shortens the effective focal length by ~0.71× (standard) or ~0.64× (XL for MFT / BMPCC), brightening exposure by roughly 1 to 1.3 stops and concentrating the image circle. Use one only when there's enough flange deficit to need optical correction; on a same-flange or longer-flange body, a mechanical adapter is the right tool.
- Does the picker recommend specific SKUs I should buy?
- It names documented SKUs that other users and reviewers have validated for that combination — Canon EF-EOS R, Nikon FTZ II, Sigma MC-11 and MC-21, Metabones EF-E Mark V, Sony LA-EA5, Fringer EF-FX and EF-GFX, Viltrox EF-NEX IV, Megadap MTZ11, Techart LM-EA9, and others — along with their published caveats (autofocus level, IS pass-through, aperture-control method, weather sealing). It does not link out to retailers, doesn't earn affiliate revenue, and won't track which SKU you settle on. Verify current availability and pricing on the manufacturer's site or your retailer of choice.
- Can I save a picker result to come back to later?
- Yes. Pick a body and a lens, then use the “Save this kit” affordance inside the result card. Signed-out users see a link to /account; signed-in users get a small form that defaults the kit name to the pairing you just picked. Saved kits live at /account/kits and can be deleted from there. Signed-in users also see a “View your saved kits →” link above the picker form on return visits, so you can jump straight to a previously-saved combination. Saving is optional — the picker itself runs entirely client-side, no account required.