Filter start position for autofocus

[Mirko]

Since the various filters have a different point of fire you could insert a different movement value for each filter for the first fire. For example, I have a anti-pollution filter that focuses on 11900 and one has stepping at 11500. The steps for autofocus are 50 step. Then the "first autofocus" instruction would also be differentiated (because he moves the focus to the initial station and then the autofocus runs) from the normal autofocus which is the current one.

[Stefan B]

Hi,

I am not able to fully understand the suggestion. Can you maybe rephrase the idea a bit? Is this about moving the focuser to an initial absolute position for a first autofocus?

[Mirko]

I don't have a filter-wheel. And I don't even have a fixed location. When I start a session and decide that filter use US this sequence: Autofocus, Plate Solve, and positioning, centering and rotation of the object to be photographed, and autofocus again because I have a manual rotator.
The autofocus procedure consists in adding to the current position x step and then decrease them until you find the right placement.
Before the first autofocus that I start using the Move Focus function at a custom value associated with the filter so when I launch the Autofocus adds X Step and starts to decrease to harvest the correct point.
In my case the fire point for my anti-pollution filter is around 12000 steps, for my HA filter it has 11500.
Thus depending on the filters I have to specify a different value in the template before making the autofocus.
If the autofocus routine knew which is the first autofocus, because for example the focuser is in position 0, could already move the fok at a specific value and then increase X step and then run the routine. This is why a custom value for each filter to enter the filter specifications for each filter so that when I insert a filter he automatically moves first in a specific position and then executes the routine.
I hope I made me understand.

[Stefan B]

Removing version: 1.11 Nightly (automated comment)

[Stefan B]

This is already possible when using filter offsets in the autofocus tab. When you specify offsets and don't select an autofocus filter it will still just apply these offsets. The offsets will then bring you close to focus position on filter switch and then you can invoke the autofocus just fine.