minimum readable rise/fall times in an oscilloscope

How can I calculate minimum readable rise/fall times of a signal in an oscilloscope (from practical point of view)? Does it depend just to bandwidth and sampling rate of oscilloscope? regards

• A 1MHz low-pass filter has TAU of 1/2*PI, thus 160 nanosecond TAU (0-63%). To get to 90%, you need 2 tau, thus about 1/3 of the period of the F3dB. – analogsystemsrf Jun 18 '18 at 15:51

$$\text{Rise Time} = \frac{0.35}{\text{Bandwidth}}$$