My very first astropictures were taken on diafilm with a Canon Eos 100 (..without the 'D' extension...). H-alpha sensitivity was good, the horsehead nebula showed up unexpectedly on one of the pictures. In the digital age, Canon 300D was the first one, quickly followed by a for astrophotography modified Canon 40D (hence the inofficial name 40Da). The normal filter in front of the sensor is replaced by a UV-IR filter glass, allowing more light of the H-alpha band (656 nm) passing through. In 2013 I purchased a modified Canon 600D, in which even the UV-IR filter is missing, allowing besides astrophotography also nice daylight infrared photography. The 600D has an articulated screen which is very useful for astrophotography:it avoids the 'astronomers neck' syndrome...

For normal photography I owned a Canon 5D (sold) and nowadays a Canon 5Dm3. The 5Dm3 has superb low noise light sensitivity but lacks good H-alpha capability (and modification would ruin the normal day light capability).