Storage compartment

As with the 1D and 1Ds Marks III, the 1D Mark IV has a rubber-sealed, latch-released, sprung door that plays host to a CF and SD card slot. As you'd expect, the two slots are compatible with the faster UDMA and larger capacity SDHC (but not SDXC) variants respectively.

Battery, Charger, AC Adapter and Compartment

The Mark IV takes the same Lithium Ion LP-E4 battery (11.1V, 2300 mAh) as the Mark III, which is rated at 1500 shots according to CIPA standards. When using live view that figure drops to a compact-camera-like 270 shots, though we doubt many 1D Mark IV owner will use live view for all their shooting. The LC-E4 charger takes around 2 hours for a full charge and can accept two batteries at once. There is also an AC adaptor kit (ACK-E4) in the box that uses a 'dummy battery' system.

If you take a close look at the last image below, you'll see some of the rubber environmental sealing around the end of the battery which keeps the compartment waterproof.

Environmental seals

As you'd expect of a camera at this level, the 1D Mark IV features extensive weather sealing. There are 76 rubber seals around the various buttons, dials and closures on the body and, when used with one of the company's 'weather-resistant' lenses, is described as being 'dust and water resistant.' Realistically this means you don't have to worry about the camera breaking if it unexpectedly starts to drizzle while you head for cover, but that you can't expect the service department to show much sympathy if you damage the camera by constantly using it in the rain.


There have been a few changes under the rubber covers on the left-hand flank of the Mark IV - the PC Sync flash socket and cable release connectors still nestle under the upper flap but the connections beneath the lower door have been revised. The USB connector becomes a combined digital and A/V output, freeing up room for a stereo mic input and HDMI socket for users of the camera's movie capabilities.

Flash / Accessory Hot shoe

The Mark IV features the same 'E-TTL II' flash metering algorithm as its predecessor. This system is essentially similar to E-TTL (pre-flash metering) except the algorithm has been tweaked to ignore very bright specular reflections and to also take into account distance information from the lens (if available) to produce a more accurate flash exposure. E-TTL II works with all Canon lenses (although distance information is only provided by some lenses).

Other flash photography features

High-Speed Sync (FP Flash) Enables flash sync with all shutter speeds from 30 to 1/8000 sec (Canon EX-series Speedlites)
FE (Flash Exposure) Lock Press the FEL button to lock the flash exposure at the desired part of the subject
Flash exposure compensation +/-3 EV in 0.3 EV or 0.5 EV steps
FEB (Flash Exposure Bracketing) Flash exposure bracketing (only FEB compatible Speedlites)
E-TTL II wireless auto flash with multiple Speedlites Wireless-compatible Speedlites only
Sync speed Non-Canon flash units up to 1/300 sec
PC Terminal For connection to external / studio flash systems, threaded

WFT-E2 II Wireless transmitter

The EOS-1D Mark IV not only supports Canon's WFT-E2 II clip-on wireless transmitter, it allows its use with Wi-Fi Protected Setup (WPS) networks, which wasn't possible with the Mark III. The WFT-E2 II allows the camera's images to be broadcast to remote computers or ftp sites and also has a USB port, so you can shoot and record images directly onto a USB storage device. The unit also supports the recording of GPS data (when connected to a compatible device). Finally you can use the WFT-E2 II to wirelessly control the camera, via the supplied EOS Utility software.

However, despite its wide range of functionality, the WFT-E2 II (or E2A in some regions), is still limited to the older, slower 802.11g standard, rather than the now-common 802.11n. (Images show the EOS-1Ds Mk III)


The bottom of the Mark IV is the same as all previous EOS-1D cameras. The metal tripod mount is aligned with the center of the lens. The eyelet on the left is for attaching the optional hand strap.

In the box

Inside the box you'll find a large range of accessories and items:

  • EOS-1D Mark IV Digital SLR
  • Eyecup
  • Wide Neck Strap L6
  • Stereo AV Cable AVC-DC400ST
  • USB Interface Cable IFC-200U
  • Cable Protector
  • Battery Pack LP-E4
  • Battery Charger LC-E4
  • CR2025 Lithium Battery
  • EOS Digital Solution Disk
  • Instruction Manual (not shown)
  • Software Instruction Manual