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Best camera for Daystar Quark among listed models?

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#1 V0LDY

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Posted 18 April 2024 - 03:29 PM

Hi, my astronomy club recently bought a refractor with a Daystar Quark, I've tried using it for imaging with results I'm happy with (at least considering those were my absolute first time trying solar imaging, see attached file! grin.gif ), however I found that one of the biggest limitation of the camera I've used (my QHY5-L II M intented to be used as a guide camera) was the EXTREMELY narrow field of view I get when pairing it to the 2000+ mm of focal length resulting from the combination of the telescope with the Quark's integrated barlow.

 

The QHY is only 4.8x3.6mm, the models I find more interesting are all from PlayerOne

 

Two of them are global shutter models

 

• Apollo M Max - IMX 432 - 14.5x9.9mm - 1608x1104px - 9µm - 126 FPS - 100ke 12bit

• Apollo M         - IMX 174 - 11.3x7.1mm - 1936x1216px - 4.5µm - 164FPS - 24.8ke 12bit

 

The third has a rolling shutter

 

• Saturn-M SQR - IMX533 - 11.3x11.3mm - 3008*3008px - 3,75µ - 43FPS - 73ke 14bit

 

 

Does the rolling shutter provide a benefit for this kind of imaging?
Which one of the models would you pick? I've seen people using all of them so it probably won't even matter too much grin.gif 
 

Attached Thumbnails

  • sole drizzle 2x deconv terra.jpg

Edited by V0LDY, 18 April 2024 - 03:30 PM.


#2 MalVeauX

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Posted 18 April 2024 - 03:43 PM

It depends if you want to critically sample and what your system final effective focal ratio is. The IMX432 is a good sensor for telecentric systems that are long focal-ratio, as it critically samples 656nm around F32 so you can typically use it without a reducer. The IMX174 and IMX533 would need reducers to sample properly which is more complicated and and can be problematic with the blocking filter size and proximity (12mm). Rolling vs global shutter is an ancient topic that really doesn't apply these days, so don't sweat that part.

 

Very best,


Edited by MalVeauX, 18 April 2024 - 03:44 PM.


#3 C0rs4ir_

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Posted 18 April 2024 - 03:46 PM

Hi, people use all of them, but with different systems and goals in mind. The Apollo Max is the best fit of these cameras to sample with the Quark.

#4 V0LDY

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Posted 18 April 2024 - 05:33 PM

The OTA is a 90/560mm, with the integrated barlow it goes to 2400mm.

 

I think with the 3.75µm pixels of the QHY5 I'm oversampling, but it's nice if I also want to use it for Lunar imaging.



#5 MalVeauX

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Posted 18 April 2024 - 07:17 PM

The OTA is a 90/560mm, with the integrated barlow it goes to 2400mm.

 

I think with the 3.75µm pixels of the QHY5 I'm oversampling, but it's nice if I also want to use it for Lunar imaging.

That's a 90mm F6.2, so with a Quark's 4.2x telecentric, that's F26. The 3.75um pixels you referenced critically sample 656 at F14, so that's grossly over-sampling. The IMX174 will sample this better (a little over sampled, but only a little). The IMX432 would work fine, and undersample a little.

 

Very best,



#6 V0LDY

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Posted 19 April 2024 - 10:43 AM

Do you think global shutter would make any difference?




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