quick questions about new SDK - bit depth & force still mode

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mAnKiNd
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quick questions about new SDK - bit depth & force still mode

Post by mAnKiNd » Fri May 04, 2018 7:45 pm

Hi Robin, hope you're well,

With the latest update and the latest QHY SDK, can we now enable the option in Sharpcap settings to "save 10/12/14 bit images..."?

Could you please shed some light on the practical differences offered by enabling "force still mode"? I don't remember seeing this option before the SDK update, but maybe I'm wrong

Many thanks
Minos
Celestron AVX
SW Esprit 80 & 150PL, Meade 4422, QHY miniguidescope
QHY183C, QHY5LIIM, QHYIII224C, Canon M10'a'
QHYCFW2-S 6x1.25"

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admin
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Re: quick questions about new SDK - bit depth & force still mode

Post by admin » Fri May 04, 2018 8:26 pm

Hi Minos,

1) Save 10/12/14 bit images in FITS is only really useful for astrometry purposes (apparently some of the analysis programs used don't take nicely to the FITS file data being stretched up to the full 16 bit range). By default SharpCap does stretch images out to 16 bit to avoid a flood of 'why does my saved image look darker' questions... :)

2) Force still mode was a workaround for a user who had issues with longer exposures on the QHY183 (or was it the 163?). Anyway, the issue was resolved for them by working in 16 bit mode and forcing the camera into still mode rather than video mode. There is no real advantage to using this if your camera works properly without it.

cheers,

Robin

mAnKiNd
Posts: 64
Joined: Sun Jun 11, 2017 4:55 pm
Location: Long Island, NY
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Re: quick questions about new SDK - bit depth & force still mode

Post by mAnKiNd » Sat May 05, 2018 1:26 am

Gotcha, thank you for your reply :)

All the best
Minos
Celestron AVX
SW Esprit 80 & 150PL, Meade 4422, QHY miniguidescope
QHY183C, QHY5LIIM, QHYIII224C, Canon M10'a'
QHYCFW2-S 6x1.25"

eseavey
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Joined: Thu Jan 18, 2018 3:39 pm

Re: quick questions about new SDK - bit depth & force still mode

Post by eseavey » Wed May 09, 2018 8:48 pm

Interesting! I didn't notice this feature yet, but I like to be able to save images in the 12-bit format that comes from the camera. Will look for that feature when I get home tonight.

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