Connectors

On the left side of the camera is the battery and PCMCIA compartment which can take two Type I / Type II or one Type III cards.	On the right side, tucked behind the hand strap and under a rubber cover is a IEEE 1394 (firewire) connector and AC adapter power input.
One noteworthy change for the 620 (compared to the 520) is that the battery / PCMCIA compartment door opens horizontally (front to back) instead of vertically (top to bottom). The old vertical opening door was sometimes awkward especially if the camera was placed on a surface (as the door would be pushed upwards by the weight of the camera). Note also that the latch has changed to a more robust twist-catch type.

Top-of-camera Controls

The dial on the top left of the camera controls the drive mode, either Single (S), Continuous Low-speed (CL; 2.0fps), Continuous High-speed (CH; 3.5fps), Continuous slient-low-speed (CS; 1.0fps), and Self timer (10 seconds). You may also re-program the default fps for each of these modes.

As with most of the controls on the camera there is a lock button to hold down as you rotate the dial (visible top left of the dial).

The red light next to the dial is the self-diagnostic shutter system which would only light if there was a major problem with the shutter mechanism (such as a shutter curtain failing), "Err" would also be displayed on the LCD.

On the right hand side of the viewfinder is the metering system selector, either Spot, 3D Color Matrix or Center weighted. Again, you must hold the lock button whilst turning the dial.

Top right back of the camera (under your thumb) is the Main-Command dial, Auto-Exposure and Auto-Focus lock and Auto-Focus start button.

The Main-Command dial is used to select shutter speed in Shutter-priority or manual exposure mode. To perform flexible program changes in programmed auto exposure mode.

Top right front of the camera (under your index finger) is the main power and LCD lighting switch (again lock button must be held to operate), Auto Focus area mode, Exposure mode and Exposure compensation buttons (all used in conjunction with the Main-Command dial).

On this image you can also see the depth of field preview button and mirror lock-up lever.

Rear-of-camera Controls

Gone are the textual descriptions on buttons, now all icons are used.

DISP/MENU (the top icon) - Switches the LCD display on and off, when held and used with the main thumbwheel it selects between the six main system software modes (image review, 4 thumbnails, 9 thumbnails, folder selection, menu and contrast setting).

SELECT (the cursor icon) - just pressing this button when reviewing an image will display the image histogram, holding the button and using the thumbwheel will switch between each image (in image review or thumbnail mode), it is also used to navigate the menu system.

TAG (the tick icon) - allows you to mark / unmark images, selection can then be used for image deletion or movement to other folders (image marks are carried through to TWAIN driver). Holding the button for more than two seconds with an image displayed on the LCD allows you to record a voice annotation.

W.BAL (the lightbulb icon) - allows for selection between the five white balance modes (AUTO, daylight, tungsten, flourescent, flash).

Another change from the 520 is the use of a smaller four position cursor control instead of the rotating wheel. I personally preferred the wheel approach which was much more natural and quicker for navigating through the menu and through images.

This cursor control is also used to select one of the five focal points.