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CMOS sensors for EAA

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#126 XS_Man

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Posted 21 September 2017 - 11:46 AM

When would an IMX385 camera be coming out? It has larger sensor size than IMX224, but similar specifications.

ZWO is currently working on a new ASI 385.

Anti-amp glow reduction circuit.

Price announced should be same as ASI 178 color.

 

Albéric


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#127 Robrj

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Posted 02 October 2017 - 12:11 PM

ZWO just announced the ASI385MC on their Facebook Page this weekend (Sept 30th).
https://www.facebook...398304606885425

Sam commented that it's going to be selling for $399.
1936x1096.



#128 Astrojedi

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Posted 02 October 2017 - 12:25 PM

Nice catch Rob. That is going to be an excellent EAA sensor.


Edited by Astrojedi, 02 October 2017 - 12:27 PM.


#129 A. Viegas

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Posted 02 October 2017 - 12:29 PM

$399  is a fabulous price point too!      I think the solar system imaging crowd will really love it



#130 mclewis1

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Posted 02 October 2017 - 01:51 PM

So for an extra $100 (or 1/3rd more than the ASI224 camera) you get about a 1/3rd larger linear fov (and a little less than 100% more by area) and very slightly less read noise.

 

If I were ZWO I'd kill the regular ASI224 camera and re release it in the lower cost mini model (usb 2, smaller form factor, etc.) and position the new 385 camera at $350 or so (and therefore play the volume game where the 385 would pick the majority of the older ASI224 sales).

 

The ASI385 and similar cameras represent the sub $500 viable replacement for the mid and higher end Mallincam analog video cameras that we've been talking about for a number of years.


Edited by mclewis1, 02 October 2017 - 01:56 PM.


#131 jimthompson

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Posted 02 October 2017 - 02:07 PM

The 1/2" sensor size seems like a nice sweet spot, at least for those of us using reasonably affordable telescopes and focal reducers.  I wonder however what would be the compelling reason to get the ASI385 over the ASI290 which has a similar resolution but smaller pixels?  I have come to quite enjoy the small pixels of my ASI290 when doing lunar and solar imaging as it saves me from using a Barlow to get the close-ups I want.  I can also stick it on a very short focal length scope or lens and get nice framing of common DSO's.  From an EAA perspective, is the sensitivity per unit sensor area of the IMX385 better than the IMX290?  If so by how much?

 

cheers,

 

Jim T.



#132 Astrojedi

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Posted 02 October 2017 - 02:25 PM

The 1/2" sensor size seems like a nice sweet spot, at least for those of us using reasonably affordable telescopes and focal reducers.  I wonder however what would be the compelling reason to get the ASI385 over the ASI290 which has a similar resolution but smaller pixels?  I have come to quite enjoy the small pixels of my ASI290 when doing lunar and solar imaging as it saves me from using a Barlow to get the close-ups I want.  I can also stick it on a very short focal length scope or lens and get nice framing of common DSO's.  From an EAA perspective, is the sensitivity per unit sensor area of the IMX385 better than the IMX290?  If so by how much?

 

cheers,

 

Jim T.

 

Jim,

 

See my earlier post which provides some sense of sensitivity per micron: https://www.cloudyni...-5#entry8114180

 

The sensitivity difference between the 290 and 224 is not huge but the 224 sensor architecture is currently the most sensitive out there. I think the appeal of the 385 (at least to me) is the slightly larger sensor which increases FoV but stays within the performance envelope of the common reducers and SCTs used by many.

 

I would have preferred a 1" or 825 sized version of the 224 sensor but none of this spec seem to be imminent. But 385 is definitely a step in the right direction.

 

Hiten


Edited by Astrojedi, 02 October 2017 - 02:25 PM.


#133 Astrojedi

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Posted 09 October 2017 - 05:46 PM

Updated standings to include the 287 and mono versions... The table is somewhat incomplete as I have not included the mono versions of all sensors or all the new sensors that have been announced. The pace of new sensors coming out is quite brisk hence this table gets outdated pretty fast.

 

As before ranked in order of sensitivity per micron - from highest to lowest.

 

Added another column: "Calculated Sensitivity for  x2 SW Bin (G F5.6 1/30s)": This column calculates the estimated sensitivity if using x2 software binning with that sensor. This gives you an idea how the sensor performs with software binning and how it compares to other larger pixel cameras.

 

The linear pixel size with x2 SW binning will the pixel size * 2. So for example for the 224 the x2 bin pixel size will be 3.75 * 2 = 7.5 microns.

 

I really need to find out what happens when I x2 bin the IMX287  : )

 

Clipboard01.jpg


Edited by Astrojedi, 09 October 2017 - 06:08 PM.

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