Working at a power of 240x is no problem with the Portaball. Seeing conditions, however, sometimes limit the achievable resolution. Very faint stars can be detected with this telescope. I believe that under the best conditions it will be possible to get close to magnitude 15. Portability and Ease of Operation Optical excellency is not the only reason for selecting a Portaball telescope.
Portability is another important factor.
I am lucky enough to have a shield where I can keep my telescope at outside temperature. Therefore I will normally keep my telescope assembled. As such the telescope can still be carried by one hand, and I use the Portaball as an oversized, but still handy Pronto . I also keep the scope assembled when I transport it by car. When using public transport I disassemble it.