Zomm lens or p&s superzoom camera?

[SLTA55]

Hi friends is my first day in the school. Hi to all Hi teacher.!
I have a dilemma: I have a Sony SLTA55 DSLR camera wit the standard 18-55 mm lens.
I need take a far objects in a motorcycle rallies. And need a zoom.
I can buy a SAL 75-300 mm zoom lens for my dslr or buy a Canon SX30-IS p&s. What need I do? The super zoomfrom Canon is a monster 845mm!!
Thanks for Your Help-.--
Tony

[dlambert]

You're going to need really, really good lighting to stop action while zoomed that distance. If you've got good enough lighting that you can shoot with a shutter speed of 1/400 or faster, you might get decent results with the Canon.

The two things the DSLR gives you that the P&S will never give you are a bigger / better sensor and the ability to spend an unlimited amount of money buying the huge lenses you'll need for stop-action sports photography.

If there's any way you can rent or borrow one or both of these and try them out, that would be a big help, because you can start to see how they react in the conditions you're shooting in.

[inkista]

I say go for the 75-300 telephoto zoom lens. The P&S is likely to suffer from shutter lag, which means it's going to be hard to time fast-action shots exactly. No point in having the reach if all you're going to do is end up pushing the button a quarter of a second too late.

[tlake55]

I also say go with the zoom lens. I had the Canon PowerShot SX10, heck of a zoom, but the shutter speed is just too slow for fast action shots and you need really good lighting to get good shots.