Coma on F/5

[Dom1961]

How bad is the coma on an F/5 Newtonian, is it so bad that I will need a coma corrector?

[DaveS]

For visual, and provided you keep the object centered you may get away without, but for imaging, especially with a DSLR (Which I think you'll be using from an earlier post) then yes, definitely.

[frostynixon]

It also depends on what sensor size you want to use. For me the coma is too much on an APS-C sized DSLR sensor.