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Be as specific as possible when reporting issues and *ALWAYS* include the full version number of the application you are using and your exact *CAMERA MODEL*
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When shooting with two cameras at the same time, they are mounted on two different telescopes (usually).

It is normal that the acquisition plan is the same in the two Master / Slave cameras but the option to change the ISO (in the slave camera) is important and desirable since, for example; the performance of a GSO RC 6 "  f/ 9 and a Refractor 90mm f / 5 is very different and the way to optimize light shots is to play with the ISO of this second camera.

Currently I solve this issue (somewhat handmade) by starting the two cameras independently, the same number of shots and times but different ISO and launched the shots of the two cameras at the same time; the result is good, two simultaneous sets of lights, Wide Field and Narrow Field but with compensated lighting.

I sincerely recommend that you study the proposed option of being able to select a different ISO in Master-Slave. Regards.

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Sorry, but you are not correct in your understanding of the use for Master/Slave instances of BYE/BYN.

The main use case for the Master/Slave setup is when you have two DSLR cameras on the same mount, rather than on two different mounts. If you are using dithering between exposures then you need the camera control app to dither the mount when neither camera is exposing an image this requires both instances to be synchronized. If you have both cameras on different mounts then they do not need to be synchronized.

I don't understand the benefit of shooting at two different ISO's.  It is more typical to find the best ISO for your camera and just shoot with that.

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I have installed in the same Skywatcher AZ-EQ5 PRO mount a 6 "f / 9 RC GSO telescope and a 90mm f / 5 Refractor in parallel.
Each has a different Canon camera mounted (550D and 1100D both refrigerated) that shoot at the same time and cover different amplitude fields (different focal lengths).

  Obviously on both cameras, execute the same number of shots, during the same time and at the same time.
Having them synchronized interests me to facilitate the operation and execute the Dithering.

The option of using two different ISOS is necessary to be able to adjust the sensitivity of the camera to the field they cover (since the exposure time must necessarily be the same) you cannot use the same parameters with two different telescopes, with diameters and focal lengths different ... I don't know if I explain.

Attached link to a view of my installation. MY TEAM - Deep Space

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Hello, I have installed the new version without problem, I have not yet been able to test it extensively.

May I insist on my request, which I think is reasonable.

The possibility of using different ISOs in the master and slave cameras is justified in parallel camera setups but with different optics, which is necessary to set different ISOs (same exposure time, number of shots etc ... the rest of parameters remain identical) for a different focal ratio and final brightness of the set. Regards,

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