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SX730 HS and setting focal length for astro photography

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Offline InQuistve

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SX730 HS and setting focal length for astro photography
« on: 05 / October / 2022, 08:04:45 »
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Is there a way to set the focal length, i.e. the level of zoom in a script? I am currently using two minute exposures, and a repeatable zoom level or FL is desirable as it allows images from different nights to be used.

Here is an example for what I am doing. If the F/L was the same on other nights I could use those pics to add to this image.
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Offline c_joerg

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Re: SX730 HS and setting focal length for astro photography
« Reply #1 on: 05 / October / 2022, 09:17:06 »
Quote from: InQuistve on 05 / October / 2022, 08:04:45
Is there a way to set the focal length, i.e. the level of zoom in a script?

You can use set_zoom()
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Offline InQuistve

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Re: SX730 HS and setting focal length for astro photography
« Reply #2 on: 05 / October / 2022, 15:50:34 »
Confirming that the variable is in mm ... set_zoom(100) = 100mm ?
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Offline waterwingz

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Re: SX730 HS and setting focal length for astro photography
« Reply #3 on: 05 / October / 2022, 21:09:46 »
Quote from: InQuistve on 05 / October / 2022, 15:50:34
Confirming that the variable is in mm ... set_zoom(100) = 100mm ?
Nope - it's in zoom steps.  Each Powershot zoom lens has multiple discrete steps across it's zoom range.  The number of steps varies by camera model. See : set_zoom
« Last Edit: 05 / October / 2022, 21:11:43 by waterwingz »
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