Canon 350D has a
8.0MP APS-C (22.2 x 14.8 mm ) sized CMOS sensor . On the other hand, Canon R7 has a
33.0MP APS-C (22.2 x 14.8 mm ) sized CMOS sensor and features Digic X processor.
Canon R7's sensor provides 25MP more than Canon 350D's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
Below you can see the 350D and R7 sensor size comparison.
Sensor Size and Resolution Comparison image of Canon 350D and Canon R7 Cameras
Canon 350D and Canon R7 have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture. On the other hand, since Canon 350D has 305% larger pixel area compared to Canon R7, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
Sensor size sets the circle of confusion, so it drives how much depth of field each
of these bodies gives you at a given aperture. You can calculate it exactly for the
Canon 350D
or the
Canon R7 ,
including hyperfocal distance.
