Canon EOS-1D X Mark III vs Canon EOS Rebel XT

In this comparison, we will evaluate the Canon EOS-1D X Mark III and the Canon EOS Rebel XT, highlighting the advantages of each over the other, discussing their pros and cons, shared strengths and weaknesses, and providing a rating based on their available features and specifications to assist you in choosing the one that best suits your needs.

Canon EOS-1D X Mark III was introduced in January 2020 and Canon EOS Rebel XT was introduced in April 2005. Let us first list highlights of the models.

Now that we've looked at the most essential specifications and gained a basic understanding of these cameras, we can delve into more details and see the differences between them.

This section shows those features and specifications which are the reason to choose Canon EOS-1D X Mark III over Canon EOS Rebel XT.

This section shows those features and specifications which are the reason to choose Canon EOS Rebel XT over Canon EOS-1D X Mark III.

We already listed pros and cons of each model. However, you may also find useful to look at their common strengths and weaknesses shown side-by-side.

Screen

Canon EOS-1D X Mark III has a 3.2" screen with 2,100k dot resolution and Canon EOS Rebel XT has a 1.8" screen with 115k dot resolution. Both have Fixed screens. Canon EOS-1D X Mark III also features touchscreen which has advantages such as easy menu navigation, intuitive controls, quick setting adjustment and most importantly a Touch-to-Focus functionality allowing users to select a specific point on the screen where they want the camera to focus. This feature can be helpful for achieving precise focus in both photo and video recording.

Viewfinder

Canon EOS-1D X Mark III has a built-in Optical (pentaprism) viewfinderCanon EOS Rebel XT has a built-in Optical (pentamirror) viewfinder. Canon EOS-1D X Mark III has 100% coverage with 0.76x magnification and Canon EOS Rebel XT has 95% coverage with 0.80x (0.50x 35mm equivalent) magnification.

Canon EOS-1D X Mark III features a 20.1 megapixel Full Frame CMOS sensor with dimensions of 36 x 24 mm and a total area of 864 mm². Its native ISO range is 100 - 102,400 and expands to 50 - 819,200 in boosted mode. Canon EOS Rebel XT features a 8 megapixel APS-C CMOS sensor with dimensions of 22.2 x 14.8 mm and a total area of 219 mm². Its native ISO range is 100 - 1,600.

Here is a sensor size comparison chart where you can see how different sensors compare with each other:

Sensor size chart

	Sensor	Dimensions	Area	Aspect Ratio	Crop Factor
	Medium Format	44 x 33 mm	1452 mm2	4:3	0.79x
	Full Frame	36 x 24 mm	864 mm2	3:2	1x
	APS-H	27 x 18 mm	486 mm2	3:2	1.3x
	APS-C	23.6 x 15.6 mm	368.2 mm2	3:2	1.5x
	APS-C (Canon)	22.3 x 14.9 mm	332.3 mm2	3:2	1.6x
	Micro Four Thirds	17.4 x 13 mm	226.2 mm2	4:3	2x
	1-inch	13.2 x 8.8 mm	116.2 mm2	3:2	2.7x
	1/1.7-inch	7.44 x 5.58 mm	41.5 mm2	4:3	4.7x
	1/2.3-inch	6.17 x 4.55 mm	28.1 mm2	4:3	5.6x

Canon EOS-1D X Mark III is equipped with DIGIC X processor and can take pictures up to 5472 x 3648 resolution. It can also take pictures with lower resolution like 4368 x 2912, 3648 x 2432, 2736 x 1824 with 3:2 aspect ratios. Canon EOS Rebel XT can take pictures up to 3456 x 2304 resolution. It can also take pictures with lower resolution like 2496 x 1664, 1728 x 1152 with 3:2 aspect ratios.

Lens Mount

Canon EOS-1D X Mark III has Canon EF lens mount and Canon EOS Rebel XT has Canon EF/EF-S lens mount. Due to Full Frame sensor in Canon EOS-1D X Mark III its crop factor is equal to 1x, this means that a 35mm equivalent focal length of the mounted lens will be equal to its actual focal length. Due to APS-C sensor in Canon EOS Rebel XT its crop factor is equal to 1.6x, this means that a 35mm equivalent focal length of the mounted lens will be equal to its actual focal length times 1.6.

No Image Stabilization

The cameras do not have image stabilization. On Canon EOS-1D X Mark III it means that you need lenses with optical image stabilization for vibration reduction. As for Canon EOS Rebel XT nothing can be done. On Canon EOS Rebel XT it means that you need lenses with optical image stabilization for vibration reduction. As for Canon EOS-1D X Mark III nothing can be done.

Built-in GPS on Canon EOS-1D X Mark III

Canon EOS-1D X Mark III has a built-in GPS (Global Positioning System) technology which allows you to automatically tag the location where you took your photos. You can later categorize, organize, and search for photos based on location. This is very useful for travel and outdoor photographers for documenting the locations where images were captured.
  Check out the cameras in our database that have built-in GPS.

Built-in Wi-Fi on Canon EOS-1D X Mark III

Canon EOS-1D X Mark III has a built-in Wi-Fi which allows to easily transfer photos and videos from the camera to other Wi-Fi-enabled devices, such as smartphones, tablets, printers, or computers. This eliminates the need for cables and allows for quick and convenient media sharing and social media integration. It gives you the ability to control your camera remotely using a smartphone or tablet. This is particularly useful for taking self-portraits, group shots, or capturing images in challenging conditions without having to touch the camera. Firmware updates can also be downloaded and installed wirelessly.
  Check out the cameras in our database that have built-in WiFi.

USB Inputs and HDMI Outputs

Both models have USB inputs for data transfer. connector for video signal output.

Battery

Canon EOS-1D X Mark III comes with NB-19 battery pack with battery life of 2850 shots.

External Storage Slots

Canon EOS-1D X Mark III has Dual CFexpress Type B (CFexpress 1.0) card slots. Canon EOS Rebel XT has a single CompactFlash (Type I/II) card slot.

Shutter

Canon EOS-1D X Mark III has Electronic shutter and Mechanical Focal Plane shutter. Canon EOS Rebel XT has Electronically Controlled Vertical-travel Mechanical Focal-plane shutter. Shutter speed can go up to 1/8000 sec on Canon EOS-1D X Mark III, and up to 1/4000 sec on Canon EOS Rebel XT. Canon EOS-1D X Mark III can shoot continuously up to 20.0 fps. Canon EOS Rebel XT can shoot continuously up to 2.8 fps.

Focusing

Both cameras have Dual Pixel CMOS AF system with Canon EOS-1D X Mark III having 191 (155 cross-type) focusing points and from -4 to +21 EV detection range and with Canon EOS Rebel XT having 7 focusing points. and Canon EOS-1D X Mark III having from -4 to +21 EV detection range.

Exposure

Exposure meterings of Canon EOS-1D X Mark III and Canon EOS Rebel XT range from 0 to +20 EV and +1 to +20 EV respectively and you can set the exposure compensation within the ±5 EV range on Canon EOS-1D X Mark III and ±2 EV range on Canon EOS Rebel XT. You can also do exposure bracketing and manual exposure adjustment on Canon EOS-1D X Mark III and exposure lock, exposure bracketing and manual exposure adjustment on Canon EOS Rebel XT.

Flash

Canon EOS Rebel XT has a built-in flash with maximum range of 12.00 m at ISO 100 and also accepts external flash. Canon EOS-1D X Mark III has no built-in flash but an external flash may be connected via Hot Shoe or PC Terminal. The fastest flash synchronization speed is 1/250 sec on Canon EOS-1D X Mark III and 1/200 sec on Canon EOS Rebel XT.

Canon EOS-1D X Mark III body has dimensions of 158 x 168 x 83 mm (6.22 x 6.61 x 3.27") and Canon EOS Rebel XT body has dimensions of 127 x 94 x 64 mm (5 x 3.7 x 2.52"). Canon EOS-1D X Mark III weighs 1440 g (3.17 lb / 50.79 oz) and Canon EOS Rebel XT weighs 540 g (1.19 lb / 19.05 oz).

Canon EOS-1D X Mark III

Canon EOS Rebel XT

158 mm

168 mm

127 mm

94 mm

168 mm

94 mm

83 mm

64 mm