Canon EOS 400D / Rebel XTi vs Canon EOS 350D / Rebel XT real-life noise comparison
To compare the effect of in-camera processing and compression, we took the 100 ISO sample in Large / RAW mode, and have compared both files for each camera below. At the time of writing, Adobe Camera RAW did not support the RAW files from the 400D / XTi, so we used Canon’s own Digital Photo Professional version 2.2 to convert files from both it and the 350D / XT.
We used the default settings for DPP, then transferred the data to Photoshop with 16-bit tonal depth before converting to 8-bit, then cropping and saving using the same settings as the JPEGs above. We will update this page when Adobe Camera RAW supports the 400D / XTi for consistency with our existing results.
Canon EOS-400D / Digital Rebel XTi with EF-S 18-55mm JPEG versus RAW
Large Fine JPEG, 100 ISO, 1/125, f11
Canon DPP 2.2 conversion, 100 ISO, 1/125, f11
Canon EOS-350D / Digital Rebel XT with EF-S 18-55mm JPEG versus RAW
Large Fine JPEG, 100 ISO, 1/100, f11
Canon DPP 2.2 conversion, 100 ISO, 1/100, f11
The processed RAW file from the EOS 400D / Rebel XTi at first glance appears sharper than the in-camera JPEG, but look a little closer and there’s undesirable artefacts especially around the fencing. Interestingly, there’s little difference between the RAW and in-camera JPEG of the 350D / XT using the file above.
Since we have used Adobe Camera RAW to process RAW images on earlier reviews, we will return to these files once Adobe supports the 400D / XTi and provide full analysis.
To compare noise levels under real-life conditions we shot the same scene using the Canon EOS-400D / Rebel XTi and Canon EOS-350D / Rebel XT within a few moments of each other using their best quality JPEG options, and at each ISO setting. Both cameras were fitted with the EF-S 18-55mm f3.5-5.6 kit lens, set to an aperture of f11 in Aperture Priority mode; f11 was necessary due to the high brightness of the scene.
The image left was taken with the Canon EOS 400D / Rebel XTi at 100 ISO using the EF-S 18-55mm f3.5-5.6 lens at 25mm f11 (40mm equivalent); the original JPEG measured 3.8MB. The crops are taken from an area just below and to the left of the centre.