This is one of the best coma correctors for imaging on the market. It's optimized for f/4 scopes, unlike the Baader MPCC Mk III, which is optimized for f/5. This means that the majority of imaging Newtonians at f/3.9 or f/4 will be a great match for this coma corrector. I consistently get sharp stars almost to the corners on an APS-C sensor with this coma corrector. It's got a 1.0x magnification, which is nice compared to some other coma correctors that slightly magnify the image. The only coma corrector that beats this one for imaging is the TeleVue Paracorr. Although it has a 1.15x magnification ratio, I get sharp stars even to the corners on an APS-C sensor. I actually enjoy the slight magnification gain — it turns my 800mm focal length telescope into a 920mm focal length equivalent. The Paracorr is considerably more expensive but worth it if you're using a Newtonian for serious imaging. Overall, though, this Sky-Watcher version is a great option too.