[camby23]

At day time, I used Tv mode to set over 1s for shooting some moving objects (let say if I'm shooting a bus) in order to get blur picutures of that objects (the bus). But G9 already automatically set itself in F8 as in red and I also adjust the -ev and turned on ND filter. But still the pictures are over exposed. What can I do? Please help. Thanks

[Laza]

Well, you've done all the setting there could be, but the aperture of F8.0 is just not small enough (hence the aperture value of F8.0 is displayed in red), even with the ND filter on.

Try using "M" mode, fix the aperture at F8.0 (smallest for G9), turn on the ND filter, then adjust the exposure time downward from 1s, then 0.8s, then 0.6s, 0.5s, 0.4s, 0.3s, 1/4s, 1/5s, 1/6s, 1/8s, 1/10s....and to see the EV slide, until it is at the middle, i.e. zero value, meaning no overexposure nor underexposure. But the trade-off of having the shot not exposed is the blurry bus wouldn't be as blurry, and the light track wouldn't be as long.

But that still can be difficult during day time, even a cloudy and overcast day (slowest would be like 1/30s, F8.0) so you can forget it if it's a really sunny day (slowest would be like 1/125s, F8.0).

Any solutions? Yes
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1. If you have the 58mm adaptor tube, then get a real ND filter. The bigger the number, the darker it is. So they come in ND4, ND8, ND16 and so on, and can cut down the exposure value by that factor.

2. Get a DSLR to do the job. Most lens at wide can have the smallest aperture at F22, some go to F29. At tele end, some go to F40 too.

In any case, You MUST use a tripod or something to support the camera for long exposure shots, if the background is to be sharp.

[camby23]

Thank Laza, it really helpful. Perhaps, I should upgrade to DSLR, though G9 has limitations, it's a great DC.