The Canon EOS 1100D delivers great image quality, with excellent noise levels, right upto ISO3200. It's not until ISO6400 that you start seeing noise artefacts, or hot black and white pixels. The The L, M, and S sizes vary individually by the camera, but the numbers at the top in the blue bar tell you the pixel dimensions. So, in this case, your L size images are 5760x3840 (or 22MP). The larger the size you choose, the bigger the file will be, but the higher the resolution and the larger you can print out the image. Pixel Size: Pixels/Megapixels: Viewfinder: DLA * Canon PowerShot G1 X: 1.9x: 18.7 x 14.0mm: 4.3µm: 4352 x 3264: 14.3 : f/6.9: Canon PowerShot G12: 4.7x: 7.4 x 5.6mm: 2.7µm: 3648 x 2048: 10.0 : f/4.3: Canon PowerShot G9: 4.7x: 7.6 x 5.7mm: 2.5µm: 4000 x 3000: 12.1 : f/4.0: Canon EOS M: 1.6x: 22.3 x 14.9mm: 4.3µm: 5184 x 3456: 18.0 : f/6.8 4272 x 2848 5184 x 3456 Sensor Sensor type CMOS CMOS Sensor size 22.2 x 14.8 mm 22.3 x 14.9 mm Sensor resolution 4278 x 2852 5196 x 3464 Diagonal 26.68 mm 26.82 mm Actual sensor size Note: Actual size is set to screen → change » Surface area: 328.56 mm² vs 332.27 mm² Difference: 3.71 mm² (1%) Live View is also used for the Canon EOS 1100D / T3's movie mode. There's a choice of 24 or 30fps when shooting video at 720p 1280x720 pixels. Note that the available frame rates are also dependent on what you have set in the menu under "Video system": NTSC or PAL. The print size we have chosen is a standard 300dpi 8"x12" format, which corresponds to about the physical size of an 8Mpix image printed at 100% magnification. Screen This tab shows the measurement values and graph derived directly from a RAW image when displayed on a computer screen at 100% magnification (i.e., one image pixel corresponding to 2.7 in color TFT LCD, 230,000 pixels: Battery: LP-E10 Battery Pack: Dimensions: 130 mm × 100 mm × 78 mm (5.11 in × 3.93 in × 3.07 in) Weight: 495 g (1.091 lb) (body only) Made in: Taiwan: Chronology; Predecessor: Canon EOS 1000D: Successor: Canon EOS 1200D Relative pixel sizes: vs. Pixel area difference: 5.55 µm² (21%) A pixel on Canon 400D sensor is approx. 21% bigger than a pixel on Canon 1100D. Pixel density. 3.71 MP/cm². 3.08 MP/cm². Difference: 0.63 µm (20%) Canon 1100D has approx. 20% higher pixel density than Canon 400D. Vxbw.