4.1 : ASCOM Camera Driver - no Gain showing

[MattTexas23]

Using the 4.1.11 version (28 August 2023) - and the ASCOM Camera Driver (Canon T3i), I cant find the ISO/Gain settings anymore in the right hand window - see screen shot.

The new features (Gain Shift) seem to have dropped off. When I click on "Show" the ASCOM driver window pops up.

desired outcome; bring back ability to set ISO/Gain for ASCOM Camera Driver Camera in 4.1

thanks!

[turfpit]

Tested this with my Canon 7D Mk2 against 4.1.11 version (28 August 2023) with ASCOM Platform 6.6 build 6.6.1.3673. For both 32 and 64-bit versions of SC, the Gain control in Camera Controls is missing. Gain is present with SC 4.0.95.38 32-bit.

Dave

[admin]

Hi folks,

thanks for the report - I will test this. There is special handling for cameras with individual gains (ISO values, etc) rather than a slider like most cameras, and I suspect that has gone wrong.

cheers,

Robin

[admin]

Hi,

this turns out to be a combination of a bug in ASCOM.DSLR (the collection of Gains it returns for the camera are not correct, according to the ASCOM specification) and the new ASCOM library I am using in SharpCap 4.1 not dealing with the issue without anyone noticing it.

It's not something I can fix in SharpCap itself, but I have raised issues with both the ASCOM team and the ASCOM.DSLR project - either fix would do the job, but the one from the ASCOM team would fix things for existing binary versions of ASCOM.DSLR rather than requiring everyone to get a new version fo that.

https://github.com/ASCOMInitiative/ASCO ... /issues/28
https://github.com/vtorkalo/ASCOM.DSLR/issues/33

cheers,

Robin

[MattTexas23]

Hi Robin,

I am trying to figure out what I need to do next to overcome this bug. I am not sure if it has been fixed in a released version of ASCOM by now - I read that the latest reply on the issue tracker on github was Oct 2023, but do not know how to interpret that.

Today I am using two versions of Sharpcap on an evening. Sharpcap 4.0 : where I can set the gains of my DSRL, so I can Polar Align. Sharpcap 4.1 if I want to Push to direction - but gain default is ISO 100 - and the window to change the gain settings is not showing on the right hand side, like reported. I run ASCOM 6.6 SP1 (6.6.1.3673).

Is it resolved, so I can update ASCOM and give it another shot?

thank you,

Matt

[MikeHuerto]

FYI
I just had the same problem with a Canon 6D. After reading this thread, I updated from ASCOM 6.6SP1 -6.6.13673. to ASCOM to 6.6SP2, running SC 4.1.12371.0 64 bi and it works. I now see and can select correct gain in the pull down menu in the panel below exposure contro (it wasnt showing with 6.6SP1)

https://ascom-standards.org/Downloads/Index.htm

CS

Mike

[turfpit]

Mike

Thanks for that. My Canon 7D MK2 has stopped working. To try to debug this I used the ASCOM.DSLR.Test program that comes as part of the DSLR driver (thus eliminating SharpCap). I have upgraded to the latest ASCOM Platform (in order to retrieve the 'gain' setting). My versions are as follows:

ASCOM-diags.JPG (21.92 KiB) Viewed 1040 times

ASCOM-DSLR-Test-version.JPG (26.92 KiB) Viewed 1040 times

ASCOM-DSLR-Camera-dll.JPG (28.07 KiB) Viewed 1040 times

What version of the DSLR driver are you running with and where did you obtain it? Mine was from the FearL0rd 2020 offering.

Dave

[MikeHuerto]

Hi Dave

To be clear, with the new ASCOM 6.6 update, my Canon 6D now works fine with SC and shows the gain drop down menu.

According to my notes, I downloaded the DSLR ASCOM driver on Feb 6, 2021 (I assume from Github).

By way of backstory - at the time the DSLR driver was for use with my Canon D450, it worked fine for a long time, then last year, the D450 stopped being able to connect to SharpCap or even any PC or Mac running the utility. I tested 2 new cables, no luck. So I assumed that it was the USB socket on the camera itself. There are several examples of this connector going bad on CloudyNights, So I finally took the plunge last week and bought a used Canon 6D MkI on MPB - thats connected fine, but thats when I noticed that the gain window was not showing up - which lead me to this page - where I found Robin's suggestion that it was an ASCOM issue pending an update - so updated ASCOM, and voila, it worked!

Hope that helps!

Best
Mike

[turfpit]

Thanks Mike.

Dave