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Morning all
We are still waiting for ZWO to bring out new cameras featuring the 4/3rds sensor and to date they do not seem to be any closer
I have been talking to them behind the scenes and it seems the ZWO ASI 294MM Pro can be binned 2x2 3x3 and 4x4 so we could swap out for this camera on the next visit.
The pixels are slightly larger than the 1600 @ 4.63um but the sensitivity goes up from 60% to 90%
So you thoughts on this would be appreciated ?
Steve
We are still waiting for ZWO to bring out new cameras featuring the 4/3rds sensor and to date they do not seem to be any closer
I have been talking to them behind the scenes and it seems the ZWO ASI 294MM Pro can be binned 2x2 3x3 and 4x4 so we could swap out for this camera on the next visit.
The pixels are slightly larger than the 1600 @ 4.63um but the sensitivity goes up from 60% to 90%
So you thoughts on this would be appreciated ?
Steve
Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)
Things to do, so little time!
Steve
Roboscopes Tea Boy
I ve got a 294MM
by default the binning is on 2 on the drivers as the bin 1 mode was released a few time after
so by default it is a bin 2 4000x2600 , 4.30um pixe
in bin 1 mod it is a 8000x5600 cam, 2.3um pixe
i m very please of using it at bin 1 mod with a 600mm focal. it make a 0.8res. Noise is very low a G130 / O20
i try some time to work at bin2 but noise is rising i found and i prefer to stick to bin 1
it is a very nice cam , Amp glow is well calibrated if you take dark with the exact parameter of light , if not , it is very present
by default the binning is on 2 on the drivers as the bin 1 mode was released a few time after
so by default it is a bin 2 4000x2600 , 4.30um pixe
in bin 1 mod it is a 8000x5600 cam, 2.3um pixe
i m very please of using it at bin 1 mod with a 600mm focal. it make a 0.8res. Noise is very low a G130 / O20
i try some time to work at bin2 but noise is rising i found and i prefer to stick to bin 1
it is a very nice cam , Amp glow is well calibrated if you take dark with the exact parameter of light , if not , it is very present
Actually rather than me relying on ZWO to answer I would rather be a 10000% sure and ask if you would kindly test your camera for me in Bin modes 3x3 and 4x4 please 
According to ZWO the camera will work fine in both modes ?
Hoping you can help
Steve
According to ZWO the camera will work fine in both modes ?
Hoping you can help
Steve
Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)
Things to do, so little time!
Steve
Roboscopes Tea Boy
I don't need pretty pictures as such, just need to know that it will take Lights, and darks frames successfully at bin 3x3 and 4x4
Even cloud pictures or inside of dome pictures will be fine LOL
If it works then I will order the camera and upgrade Pier-1 on the next visit but I don't want to buy a camera to find it is useless for long focal lengths and thanks for your help
Cheers
Steve
Even cloud pictures or inside of dome pictures will be fine LOL
If it works then I will order the camera and upgrade Pier-1 on the next visit but I don't want to buy a camera to find it is useless for long focal lengths and thanks for your help
Cheers
Steve
Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)
Things to do, so little time!
Steve
Roboscopes Tea Boy
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Votes
I strong suggest we use Bin2 instead of Bin3.
This is the few CMOS camera that actually has hardware binning. Bin2 actually uses ADC of 14bit and Bin1 is 12bit. As a consequence, Bin2 has 13 stops dynamic range DR (in 0 and unity gain) and Bin1 mode only has 11 stop DR.
Since Bin3 needs to bin smaller pixel of the Bin1 (3x3), I would say it's also using the sampling of the 12 bit ADC, thus resulting a lower DR and worse image quality.
Steve, I think we should test the DR of Bin3 mode before we use it.
This is the few CMOS camera that actually has hardware binning. Bin2 actually uses ADC of 14bit and Bin1 is 12bit. As a consequence, Bin2 has 13 stops dynamic range DR (in 0 and unity gain) and Bin1 mode only has 11 stop DR.
Since Bin3 needs to bin smaller pixel of the Bin1 (3x3), I would say it's also using the sampling of the 12 bit ADC, thus resulting a lower DR and worse image quality.
Steve, I think we should test the DR of Bin3 mode before we use it.
Yes I need to think long and hard
the only issue for me with 2x2 binning is it’s only 4.63um pixels which is way to small for 1700mm focal length and would mean serious over sampling for our location
steve
the only issue for me with 2x2 binning is it’s only 4.63um pixels which is way to small for 1700mm focal length and would mean serious over sampling for our location
steve
Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)
Things to do, so little time!
Steve
Roboscopes Tea Boy
0
Undo
Votes
Here are some images with 8" RC/or SC with 294Mm bin2, they look fine for me.
https://www.astrobin.com/9h9124/
https://www.astrobin.com/zjkd4b/
https://www.astrobin.com/tb60d8/
https://www.astrobin.com/k4dfge/
https://www.astrobin.com/9h9124/
https://www.astrobin.com/zjkd4b/
https://www.astrobin.com/tb60d8/
https://www.astrobin.com/k4dfge/
I strong suggest we use Bin2 instead of Bin3.
This is the few CMOS camera that actually has hardware binning. Bin2 actually uses ADC of 14bit and Bin1 is 12bit. As a consequence, Bin2 has 13 stops dynamic range DR (in 0 and unity gain) and Bin1 mode only has 11 stop DR.
Since Bin3 needs to bin smaller pixel of the Bin1 (3x3), I would say it's also using the sampling of the 12 bit ADC, thus resulting a lower DR and worse image quality.
Steve, I think we should test the DR of Bin3 mode before we use it.
Can you test the bin3 dynamic range from home on the next clear night ?
Cheers
Steve
Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)
Things to do, so little time!
Steve
Roboscopes Tea Boy
0
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Votes
I hope I can but I live in Pacific Northwest. At this time of the year we have almost no clear night 
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Cant complain about the scenery.
I have a 3-hour window of clear sky, will try to capture some bin3 shots.
I have a 3-hour window of clear sky, will try to capture some bin3 shots.
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I have got a confirmation from ZWO that Bin3 is based on Bin1 with 12-bit ADC. So no dual gain and less DR
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Every forum has one!
I'd prefer to wait for a replacement with very similar specs. This would probably allow more time before restarting the merry-go-round of minor but annoying initial startup issues.
Sorry Steve but if it's now fixed then why change it. Should we subsequently wish to collect more data on something we've imaged now, we'd end up with new data that would not be directly compatible in terms of image scale and fov. Not a major issue admittedly.
Cheers
Ray
I'd prefer to wait for a replacement with very similar specs.
This would probably allow more time before restarting the merry-go-round of minor but annoying initial startup issues.Sorry Steve but if it's now fixed then why change it. Should we subsequently wish to collect more data on something we've imaged now, we'd end up with new data that would not be directly compatible in terms of image scale and fov. Not a major issue admittedly.
Cheers
Ray
Ray
Roboscopes Guinea Pig
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