The T4i combines night shots of shorter exposures into ONE exposure internally to reduce blur. If you take night shots this is the camera for you. For astrophotography you can use the Astromix CLS filter for better red capture than the 60Da can get.
The T4i combines night shots of shorter exposures into ONE exposure internally to reduce blur. If you take night shots this is the camera for you. For astrophotography you can use the Astromix CLS filter for better red capture than the 60Da can get.
If you have the 20Da then the 60Da is the natural progression for you. T4i won't do as well with astrophotography. If you're not doing astrophotography then I'd recommend the normal 60D.