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Equipment Discussions >> Electronically Assisted Astronomy

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makintosz
member


Reged: 01/14/09

SBIG ST-2000XM and changed e-/ADU new
      #5553336 - 12/04/12 04:26 AM

Hello,

Recently I bought from someone an SBIG ST-2000XM Camera.

I did few tests and I found that Standard Deviation in bias frames i about 2,5x higher than my ST-2000XCM (now sold).

It was weird since both cams have same chip KAF 2020 etc.. so I searched further.

What I finally found is that e-/ADU is changed from oryginal 0.6 value to 0.26.

What can I do to switch it back to oryginal ? I dont want to return it to the guy I bought it since everything else is working fine.

I tried to contact SBIG about it to no avail so far...
I searched whole internet and didnt found any solution.

Dear Forum Members, Can You help me ?

Thanks in advance!

Michal


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Raginar
Postmaster
*****

Reged: 10/19/10

Loc: Rapid CIty, SD
Re: SBIG ST-2000XM and changed e-/ADU [Re: makintosz]
      #5553385 - 12/04/12 06:14 AM

Wrong forum. Try emailing SBIG again, they're definitely the best source for this type of information.

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ccs_hello
Postmaster
*****

Reged: 07/03/04

Re: SBIG ST-2000XM and changed e-/ADU new [Re: makintosz]
      #5553545 - 12/04/12 08:37 AM

Michal,

Definitely wrong subforum. You can also try CCD subforum.


For others:
a useful info to compare astroimager with others...

(Many high-end) astro-imagers tend to be designed/optimized with a factory preset gain (ISO / gain / e-/ADU), post the actual sensor output stage. Many models are factory fixed at a preset value (though still modifiable) not easily modified through menu setting by the end-user. The value chosen tends to be optimized toward the best possible S/N for the optimal image quality, not the highest possible gain (some loosely call it sensitivity.)

Clear Skies!

ccs_hello


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makintosz
member


Reged: 01/14/09

Re: SBIG ST-2000XM and changed e-/ADU new [Re: ccs_hello]
      #5553652 - 12/04/12 09:50 AM

Thanks, I will post it in the CCD forum. I tought that CCD forum is more for imaging and procesing in itself.

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