Apperently the Canon 1D Mark IV is currently being tested. Here are the suggested specs (not finalized yet):
- Images ~16MP
- ISO 50-26500
- 8MP sRAW1 format providing images that seem to best 1D3 files in detail [typo corrected]
- Very clean images at ISO 3200. 6400/12800 take further processing very well
- Slightly faster FPS than 1D3 in real life shooting
- AF greatly improved and very good in low light (actual comment was 'Nikon fast' 😉
- Liveview AF - not up to fast sports use, but very usable otherwise
- Video as with 5D2
- Screen as per 5D2
- Ergonomic improvements with grips - some buttons moved
- Feels faster and more responsive in nearly all aspects of real use
Via PhotographyBay