CONTAX 100mm F2.0 PLANAR
Adapter and fit feedback
www.pebbleplace.com/Personal/Contax_db.html

This thread is for ongoing discussions and experiences regarding the 100mm F2.0 Planar on the Canon dSLRs such as the 40D, 1D Mark III, 1Ds Mark III, Digital Rebels and all other Canon dSLRs. If adding an entry about a lens & adapter, please include:

1) Whether the lens is a AE or MM
2) Whether the lens is made in Germany or Japan
3) Which adapter you are using
4) If the lens works properly at its minimum focus distance and at infinity

NOTE - THIS THREAD IS FOR THE F2.0 VERSION - NOT THE F3.5 SONNAR.

The 100mm F2.0 Planar earned a "IFFY" classification due to the metal fin on the rear lens mount. This fin need to be file down ~1mm in order to mount on a Canon body. See the 100mm F2.0 Planar review more information 100mm F2 Planar Review - PebblePlace.com.

Once the fin is filed, proper fit should be easy. I've had three copies of the 100/2 - both AE and MM - and they have performed well on a 5D, 1Ds, 1Ds2 or 1Ds3 without any infinity focus issues. My current adapter is a HappyPageHK focus confirmation adapter (HappyPageHK is the seller's EBay ID). In the past I've used Cameraquest and DSLRexchange (no longer making adapters). I'm currently using a MM copy on a 1Ds3.

If the adapter is too thick, it can be extremely hard (possibly impossible) to fit on the lens mount. HappyPageHK adapters are generally 1.425mm and those have fit fine without having to use much force.

A couple recent pictures from the Contax 100mm F2 Planar taken on the 1Ds3 in Bar Harbor, Maine -