This is how my new Lumia 730 let me down !!! 
I bought lumia 730 one month ago, and few days back I was with my friend somewhere waiting for someone. we were sitting in waiting hall, there was a air cooler and we were bored like hell,he took my phone examined for some 10 minutes and challenged me that my mobile can't capture stills of moving fins of this cooler. I laughed at him and told him that it can do that, I insisted , then he put a bet of 1500 rs. (around 23-24 $). and then the game begins I tried a lot to capture cooler blades but failed , I was unable to capture stills of moving blades of cooler, I tried lower shutter speeds, plus higher/lower ISO sensitivity and all other I could do but no luck. I lost bet.
then my friend said that his own phone's camera can do that, (he has a old nokia n8) and I never knew n8 has such a powerful camera. This time I put bet of 1500 rs. , and you know what happened, he did it in one go.
so question here is that, was I doing something wrong or 730 really has such creepy camera ( can't capture fast moving objects) :/
please tell me if there are settings or combination of settings to do that.

I bought lumia 730 one month ago, and few days back I was with my friend somewhere waiting for someone. we were sitting in waiting hall, there was a air cooler and we were bored like hell,he took my phone examined for some 10 minutes and challenged me that my mobile can't capture stills of moving fins of this cooler. I laughed at him and told him that it can do that, I insisted , then he put a bet of 1500 rs. (around 23-24 $). and then the game begins I tried a lot to capture cooler blades but failed , I was unable to capture stills of moving blades of cooler, I tried lower shutter speeds, plus higher/lower ISO sensitivity and all other I could do but no luck. I lost bet.
then my friend said that his own phone's camera can do that, (he has a old nokia n8) and I never knew n8 has such a powerful camera. This time I put bet of 1500 rs. , and you know what happened, he did it in one go.
so question here is that, was I doing something wrong or 730 really has such creepy camera ( can't capture fast moving objects) :/
please tell me if there are settings or combination of settings to do that.