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Re:Flat calibration failed. Captured image is only 8-bit while requested ADU is 30000.00.

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Flat calibration failed. Captured image is only 8-bit while requested ADU is 30000.00. was created by Mohamed

Hello

Today I tried to take flat frames with ASI533MC Pro, but I got this error. I'm sure that the format of the controls tab is 24bit RGB, but all captured images are 8 bit. The same settings works fine with my ASI182MM pro.

Any advice would be appreciated...

 
Clear Skies!
Mohamed

Permanent
C9.25 f/10, HEQ5, MyFocuserPro2, OAG, ASI174MC guide, ASI533MC Pro

Portable
WO Z61, iOptron SmartEQ Pro+, MyFocuserPro2, OAG, ASI120MM guide, ASI183MM Pro, EFW
1 year 5 months ago #74861
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Replied by Jasem Mutlaq on topic Flat calibration failed. Captured image is only 8-bit while requested ADU is 30000.00.

24bit RGB is still 8bit PER channel (8x3 = 24), so it's correct.
Jasem Mutlaq
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1 year 5 months ago #74862

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Replied by Wouter van Reeven on topic Flat calibration failed. Captured image is only 8-bit while requested ADU is 30000.00.

Adding to that, why don't you shoot at 16 bit RAW? That is the preferred format for the ASI533MC camera.
Wouter van Reeven

ASI6200MM and 7 slot 2" filter wheel with a SkyWatcher Esprit 80 ED on a SkyWatcher HEQ5-Pro
ASI1600MM-Pro Cooled and 5 slot 1.25" filter wheel with an 8" TS Ritchey-Chrétien on a SkyWatcher EQ6-R
1 year 5 months ago #74864

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Replied by Mohamed on topic Re:Flat calibration failed. Captured image is only 8-bit while requested ADU is 30000.00.

Thank you all for replying and clarifying this to me. My question now would be what is the proper ADU value for 8 or 16 bit images?
Clear Skies!
Mohamed

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C9.25 f/10, HEQ5, MyFocuserPro2, OAG, ASI174MC guide, ASI533MC Pro

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WO Z61, iOptron SmartEQ Pro+, MyFocuserPro2, OAG, ASI120MM guide, ASI183MM Pro, EFW
1 year 5 months ago #74870

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Replied by Wouter van Reeven on topic Re:Flat calibration failed. Captured image is only 8-bit while requested ADU is 30000.00.

There is no proper ADU value for 8 bit since you should not take 8 bit images 
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For 16 bit many people suggest to have the peak in the middle (which would be around 32000 ADU) but I advice to go much higher (around 55000 or more as long as you don't get saturated pixels) to make the best use of the full dynamic range of the sensor.
Wouter van Reeven

ASI6200MM and 7 slot 2" filter wheel with a SkyWatcher Esprit 80 ED on a SkyWatcher HEQ5-Pro
ASI1600MM-Pro Cooled and 5 slot 1.25" filter wheel with an 8" TS Ritchey-Chrétien on a SkyWatcher EQ6-R
1 year 5 months ago #74872

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Replied by Mohamed on topic Re:Flat calibration failed. Captured image is only 8-bit while requested ADU is 30000.00.

The problem when using 16 bits images for flats is that after it starts capturing flats it saves them as grayscale images and I cannot use them to calibrate EGB images... Any idea how to save flats after calibration as RGB images?
Clear Skies!
Mohamed

Permanent
C9.25 f/10, HEQ5, MyFocuserPro2, OAG, ASI174MC guide, ASI533MC Pro

Portable
WO Z61, iOptron SmartEQ Pro+, MyFocuserPro2, OAG, ASI120MM guide, ASI183MM Pro, EFW
1 year 5 months ago #75036

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