Thanks Jasem, found the temp tolerance threshold in the master tab. CS

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I use KStars 3.5.9 stable and Indy 1.9.6. There, it works for me. Although darks are a bit picky about temperature. Has to match current sensor temp around +/- 1 deg.

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Concerning your Canon AF lens question, there exists a product called Canon lens controller which connects via USB and can be used with Indi (see device drivers). But here you connect a different cam (not a Canon body) to the lens.

CS, Bernd

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Did you take darks with 2 s exposure and gain 120 and the same sensor temperature to match your 2 s gain 120 focus frames?

CS, Bernd

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Bernd Limburg replied to the topic 'New Focus Algorithm in Ekos' in the forum. 3 weeks ago

The EAF is on the 1:1 axis, not the 10:1 axis, yes. Right now, I don't have BL compensation activated in the driver. But in the linear method, BL should only affect the one travel-back step between 1st and 2nd pass? (I thought...)

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Bernd Limburg replied to the topic 'New Focus Algorithm in Ekos' in the forum. 3 weeks ago

Hi,

John, thanks for the update! :)

Peter, that‘s indeed an interesting point. My observation is that I have a very smooth and plausible V curve in the 1st pass in most cases, and often a bad and jumpy 2nd pass curve. Never saw it the other way round, which is of course strange and doesn't make much sense, but that's the way it is. Maybe an mechanical issue of my Crayford focuser (backlash? slip?). Have to investigate more.

CS, Bernd

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Bernd Limburg replied to the topic 'New Focus Algorithm in Ekos' in the forum. 3 weeks ago

Hi,

any news on the one-pass linear algorithm? :)

Maybe a simple version with all manual parameters instead of automatically calculated step sizes will be fine as a first version? „MVA“ - minimum viable algorithm ;)

CS, Bernd

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I built all from latest git sources today. The modified handling of m_DownloadEstimation works for me (as did Max' workaround before). No timeouts after setting small ROIs and resetting to fullframe. :cheer:

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Hi,

same happens here. Disconnecting my DSP 2600c in Indi control panel (KSTars and Ekos still running), disconnecting cam from USB, re-connecting USB and connect again in Indi control panel. Driver crashes immediately (KStars/Ekos as well).

I built everything from the latest git sources.

CS, Bernd

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Hi,

I had similar problems with my DSP 2600c Pro (IMX571 sensor) using the ToupTec driver. Timeout failures after setting a subframe (during AF) and switching back to full frame again. For me, AstroMax' solution solved the problem. But at the moment you have to build the driver from Max' GitHub fork by yourself until it will be deployed.

CS, Bernd

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Bernd Limburg replied to the topic 'New Focus Algorithm in Ekos' in the forum. 2 months ago

Good point. So the focus routine can collect the needed data from the mount (f#) and camera (px size) sections.

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Bernd Limburg replied to the topic 'New Focus Algorithm in Ekos' in the forum. 2 months ago

Concerning the CFZ discussion, to determine the microns per motor step one could simply measure the max. drawtube travel and the corresponding step delta and divide those figures. So no need to know the drawtube screw pitch and motor scale.

The linear 1-pass algo (in principle any focus algo) then could have 3 additional (optional) input fields: "Microns per motor step", "Critical focus zone in micron" and "Desired step size in CFZ units". The latter can default to 0.5, but the user can overwrite it (using 1, for instance, or whatever).

The calculated step size would then be "Desired step size in CFZ units" x "CFZ in micron" / "Microns per motor step". Alternatively, the user can ignore those additional input fields and enter the step size manually as it is today.

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