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Exposures and ZWO294MC

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#1 taipan

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Posted 26 November 2020 - 04:36 AM

What exposuretimes do you use with this camera?

I always used 300s at Gain120 with my ASIAIR and Esprit 80 f/5.

Now when i got a bigger telescope i think the stars gets a little bit more overexposed and thinking if 300s is a little bit to long...

Uses the same filters and the same bortle as before.

 

Using a TS optics Photoline 115 f/7. And waiting for a Apex 0.65x reducer for f/4,5.

 

What exposuretimes are you using? And Gain?

 



#2 Eric Horton

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Posted 26 November 2020 - 05:30 AM

If using the optolong l-enhance i will go to 5 min. 0 gain. If no filter typically 90 seconds. 0 gain. I've found 90 works better with my skies than 120

#3 taipan

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Posted 26 November 2020 - 05:49 AM

If using the optolong l-enhance i will go to 5 min. 0 gain. If no filter typically 90 seconds. 0 gain. I've found 90 works better with my skies than 120

Are you using the 294MC??



#4 Eric Horton

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Posted 26 November 2020 - 05:57 AM

Yes

#5 taipan

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Posted 26 November 2020 - 08:05 AM

Yes

Why do you use 0 Gain? And not 120 wich is unity gain?



#6 audioengr

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Posted 26 November 2020 - 12:00 PM

I use the exposure that SharpCap Smart Histogram shows me is best for each object to minimize noise.  If you buy the Pro version, you will get this feature.  Works well.


Edited by audioengr, 26 November 2020 - 12:01 PM.


#7 06AwzIyI

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Posted 26 November 2020 - 12:16 PM

I use the exposure that SharpCap Smart Histogram shows me is best for each object to minimize noise. If you buy the Pro version, you will get this feature. Works well.


From my backyard (bottle 8), smart histo gives me 1s unfiltered and about 5s filtered...not sure if that's because my offset was zero but there's no way I'm going to process that many images. Anyone else have this issue?

#8 Eric Horton

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Posted 26 November 2020 - 02:35 PM

Why do you use 0 Gain? And not 120 wich is unity gain?

It is unity.  What I was meaning was I don't bump it at all.  I use Skytools 4 imaging and it gives me similar exposure times as sharpcap.  There is no way that can be right.  Now sure how they are coming up with those numbers.  I basically worked to the 90 seconds just based on the amount of gradient in the image for my light pollution.  




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