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Good Cheap Setup? Or Waste of Time?

accessories astrophotography beginner CMOS equipment imaging
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#1 PollAirUs

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Posted 02 June 2020 - 01:16 PM

Hi folks,

I'm interested in a ZWO lens I saw few days ago, it has a focal length that goes from 2.8mm up to 12mm and it's suitable for meteor capturing.

 

I'm interested in doing some meteor capture and taking All Sky images tho, but I wonder: If I use this lens at it's maximum focal length with an ASI224 (non-cooled) mounted on a star tracker to take long exposure shots, would it work? I know the images will be kinda noisy, but I hope I can avoid that noise with the stacking, darks, flats and bias.

Screenshot_1.png

 

 

Another thing to consider is the FOV of the lens, it has a maximum FOV of 100 degrees (when using it at 2.8mm, I suppose), but I'm going to use it at 12mm, so the FOV should be significantly lower. And this simulation in the Stellarium looks good to me, although I can't include the lens FOV in it, I would certainly be satisfied with this field of view in the sensor.

Rho Oph.jpg



#2 gatsbyiv

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Posted 02 June 2020 - 01:46 PM

What you're proposing would work, but I'd be concerned about the quality of the lens: chromatic aberration, distortion, etc.  Also, because that camera has 3.8 um pixels, the image scale here won't allow much detail, but perhaps you could try drizzle.  A prime camera lens would almost certainly have better optics if you could adapt it.  But this might be a fun, cheap project.  

 

If you want a start in astrophotography on a small budget, I'd suggest that you'll get better results with a used DSLR and prime lens of 50, 85, or 135 mm.  


  • mikefulb, BKMaynard and PollAirUs like this


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