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Author Topic: Flats callbration wizard  (Read 459 times)

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Offline clive

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Flats callbration wizard
« on: 19:20:56, 07 November, 2017 »
Right then when doing flats with sgo pro  flats callabration wizard  hope its not  a daft question  if im right we dont need to use my flat field pannel  ok cheers

Offline Roger B

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Re: Flats callbration wizard
« Reply #1 on: 10:38:43, 08 November, 2017 »
Yes you still need to use the flat panel.   

Rog
Scopes - TS65q, W/O 110 Triplet
Mount - EQ6 PRO via  Eqmod,  Rowan belt modded
Cameras - SX694, QSI583WSG,Lodestar Guidecam, GP-Cam, QHY5II.
TS 9mm OAG
Quantum 7x1.25 EFW, Baader LRGB,Ha,OIII,SII Filters 
Quark chromo

SGPro, Pixinsight.

************AND NO TIME TO USE IT************

Offline clive

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Re: Flats callbration wizard
« Reply #2 on: 12:33:32, 08 November, 2017 »
I thought so  nice one roger

Offline chris.bailey

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Re: Flats callbration wizard
« Reply #3 on: 13:19:32, 08 November, 2017 »
Clive

"All" the Flats Calibration Wizard does is work out the correct exposure for each filter to get you the target ADU with the light source provided. A flat panels brightness does vary so you should probably run the wizard each time but a flat panel remains the easiest (though not perfect) light source for the job.

On a cloudy day (and we get plenty fo those), pointing the scope north can often be a good light source for flats though they are of short duration so not suitable for your mechanically shuttered 8300 CCD where flats really need to have an exposure of more than a second (more than 2 ideally) to avoid the shutter casting a shadow as it sweeps across.

Chris
LX200|ZS70|FSQ85|FLT110|Altair DF250RC|EQ6 Pro(Rowan Belt Mod)|ParamountMX
ATIK383L+/EFW2/OAG|Lodestar|Baader 36mm LRGBHaSIIOIII
Starlight Express SXVRH16/ONAG/FW|Lodestar X2|Baader 2" Filters
Starlight Express SXVRH814/ONAG/FW|LodestarX2|Baader 2" Filters
Lunt LS60PTBF1200|DMK41|Quark Chromo
Samyang 135mm f1.8

Offline clive

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Re: Flats callbration wizard
« Reply #4 on: 13:52:46, 08 November, 2017 »
Ok chris so i garther i adjust the adu  im i corect chris

Offline Roger B

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Re: Flats callbration wizard
« Reply #5 on: 14:15:17, 08 November, 2017 »
I always have a adu of about 25000 give or take 500.

Rog
Scopes - TS65q, W/O 110 Triplet
Mount - EQ6 PRO via  Eqmod,  Rowan belt modded
Cameras - SX694, QSI583WSG,Lodestar Guidecam, GP-Cam, QHY5II.
TS 9mm OAG
Quantum 7x1.25 EFW, Baader LRGB,Ha,OIII,SII Filters 
Quark chromo

SGPro, Pixinsight.

************AND NO TIME TO USE IT************

Offline clive

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Re: Flats callbration wizard
« Reply #6 on: 14:19:17, 08 November, 2017 »
Oky doky

Offline chris.bailey

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Re: Flats callbration wizard
« Reply #7 on: 14:52:57, 08 November, 2017 »
Clive

For the 8300 I might be tempted to knock that back closer to 20,000 as it looses a little bit of linearity past 22,000 (or at least my Atik 8300 does)

Chris
LX200|ZS70|FSQ85|FLT110|Altair DF250RC|EQ6 Pro(Rowan Belt Mod)|ParamountMX
ATIK383L+/EFW2/OAG|Lodestar|Baader 36mm LRGBHaSIIOIII
Starlight Express SXVRH16/ONAG/FW|Lodestar X2|Baader 2" Filters
Starlight Express SXVRH814/ONAG/FW|LodestarX2|Baader 2" Filters
Lunt LS60PTBF1200|DMK41|Quark Chromo
Samyang 135mm f1.8

Offline clive

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Re: Flats callbration wizard
« Reply #8 on: 16:40:20, 08 November, 2017 »
After i get  the flats callabration wizard adu  do i then use the other seting
Flats wizard and enter my a du  in there  then do my flats yea  chris  if  right

Offline chris.bailey

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Re: Flats callbration wizard
« Reply #9 on: 17:00:11, 08 November, 2017 »
Clive

In Flats Calibration Wizard

1) Choose the profile you want to calibrated flats for.
2) Choose the filters you want to calibrate exposures for
3) Enter the target mean ADU (20,000) and set the +/- to 1,000 to give yourself a bit of leeway. I would set a 1 second minimum exposure for your 8300 CCD.

Now let flats calibration do its stuff. Check to ensure the flat panel brightness is not too high that one second exposures don't exceed the 21,000 ADU (20,000 + 1,000 tolerance). If they do, turn the brightness down or insert a couple of sheets of paper between the panel and the scope and run again.

When the wizard has finished you now setup a new sequence with image type of FLAT for each filter and the exposures calculated above will be entered as exposure. Run the sequence and it will take your flats.

Chris
LX200|ZS70|FSQ85|FLT110|Altair DF250RC|EQ6 Pro(Rowan Belt Mod)|ParamountMX
ATIK383L+/EFW2/OAG|Lodestar|Baader 36mm LRGBHaSIIOIII
Starlight Express SXVRH16/ONAG/FW|Lodestar X2|Baader 2" Filters
Starlight Express SXVRH814/ONAG/FW|LodestarX2|Baader 2" Filters
Lunt LS60PTBF1200|DMK41|Quark Chromo
Samyang 135mm f1.8

Offline clive

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Re: Flats callbration wizard
« Reply #10 on: 17:28:52, 08 November, 2017 »
Ok chris top job  roll on clear skys  and get rid of the moon  ive got a defuser pannel to help lower the brght ness  thanks for helping  me out cheers

 

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