iso sx230 - page 2 - General Discussion and Assistance - CHDK Forum

iso sx230

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Offline reyalp

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Re: iso sx230
« Reply #10 on: 26 / March / 2013, 17:02:33 »
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thank, there aren't mode for long exposure with dayligth?
override diafram??or....???
bye
You could use an external neutral density filter, assuming you find some way to rig it in front of the lens.
Don't forget what the H stands for.

Re: iso sx230
« Reply #11 on: 26 / March / 2013, 17:34:09 »
You could use an external neutral density filter, assuming you find some way to rig it in front of the lens.

That is what I do with my S95 stereo rig.

See animated GIF below.


Re: iso sx230
« Reply #12 on: 26 / March / 2013, 19:28:45 »
Or even better,  put a darker ND filter in front of the lens and set the exposure manually with CHDK.
You could use an external neutral density filter, assuming you find some way to rig it in front of the lens.
Maybe we should suggest that he put an ND filter in front of his lens?   :blink:


That is what I do with my S95 stereo rig.
I'm still kind of curious about why you would want to do that?  Slower shutter speed hoping to purposefully blur an action shot?
« Last Edit: 26 / March / 2013, 20:02:03 by waterwingz »
Ported :   A1200    SD940   G10    Powershot N    G16

Re: iso sx230
« Reply #13 on: 26 / March / 2013, 20:58:37 »
That is what I do with my S95 stereo rig.
I'm still kind of curious about why you would want to do that?  Slower shutter speed hoping to purposefully blur an action shot?

I was responding to how to fit a filter (or close-up lens) rather than specifically a ND filter.


Re: iso sx230
« Reply #14 on: 26 / March / 2013, 21:20:25 »
I was responding to how to fit a filter (or close-up lens) rather than specifically a ND filter.
Thanks - makes sense.  I still wonder why the OP wants to take extended shutter speed photos in daylight then. I guess we will await his response.

Ported :   A1200    SD940   G10    Powershot N    G16

Re: iso sx230
« Reply #15 on: 27 / March / 2013, 07:53:02 »
I still wonder why the OP wants to take extended shutter speed photos in daylight

So you can blur subjects such as flowing water without stopping down.

Most users do not understand but on these small sensor cameras the aperture is effectively the set aperture multiplied by the crop factor (as far as depth-of-field is concerned).

So, f4 on my S95 is equivalent to f18 on a 35mm camera.
In fact, stopping down these cameras at all may lead to loss of sharpness.
My own tests showed that was the case with the S95.
At full telephoto and with no stopping down my S95 is effectively f22 !

Re: iso sx230
« Reply #16 on: 27 / March / 2013, 08:31:10 »
So you can blur subjects such as flowing water without stopping down.
Thanks - I figured it might be related to wanting an artistic effect.

Quote
Most users do not understand but on these small sensor cameras the aperture is effectively the set aperture multiplied by the crop factor (as far as depth-of-field is concerned).
Yes - I felt sorry for the user who posted last  year looking for help with Bokeh photography.  Pretty hard to replicate the f1.7 setting of a  50mm lens on an old 35mm film camera.
Ported :   A1200    SD940   G10    Powershot N    G16

 

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