Sadly I'm fairly sure you stand no chance with the camera lenses you mention - and even if you saw the flash, the impact will be so brief it will be all over before you press the shutter.
To stand any chance of seeing it, you'll need a pretty decent sized scope - I'd say a 20cm aperture Newtonian at least - and magnification around 200X - and to be looking in the right place at the right time.
As I recall a meteor impact has been seen telescopically during a total lunar eclipse - but against the lit disk of a near-full moon, there is no chance. None.
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