4.11.2020 AR2781 in modest seeing.

[Rusted]

Struggling to pull the detail out in ImPPG. It isn't visible on the monitor or in Autostakkert.
At least we are having some sunshine without the gales. Seeing improving slowly.
Big bright flare at 10.48.

4.11.20 10.48 b1200s2 2x gpc.jpg (64.33 KiB) Viewed 487 times

4.11.20 12.20 b1200s2 2x gpc.jpg (56.95 KiB) Viewed 487 times

4.11.20 12.20 b1200s2 2x gpc col.jpg (105.38 KiB) Viewed 487 times

[dhkaiser]

Nice catch with the flare!

[EGRAY_OBSERVATORY]

Indeed a fab flare images and the detail is well-fab too.
Thanks Rusted for sharing

Terry

[ffellah]

Excellent images, Rusted. You caught the action really well.

Franco

[rsfoto]

Hi Chris,

Very good

[DeepSolar64]

Nice capture! Great catch on the flare.

[Rusted]

Thank you all.

I just wish these images had been better. Fierce, thermal 'boiling' all day.

Flares can be a "nuisance" for overwhelming an image with a blank white area.

It just looks so wrong!

The spot group is well seen in white light.

[marktownley]

Nice shots! Did you ever try clocking the etalon?

[Rusted]

Thanks Mark.

The Teflon tape wrap of the etalon elements has helped even out the illumination but the appearance is strangely flat.
I have tried repeated retuning and physical tilting but it hasn't helped so far.

I tried rotating the full aperture D-ERF on the OTA. No change.
Then I rotated the entire etalon + filter stack + camera via the FT focuser. No change.
Rotated the ZWO '174 camera alone. No change.

It may be the recent poor seeing is masking any obvious improvement in the highly magnified, monitor image.

I ought to try rotating the etalon and BF independently of each other and of the camera.
Not so easy to do this "live" without losing the image.
Using exactly the same section of the disk for comparison all but impossible.

[Rusted]

Did you ever try clocking the etalon?

Hi Mark.

I had a chance to try this today during appalling seeing conditions.

Rotating the etalon independent of the camera rotates off axis illumination.
Rotating the camera alone rotates its own off axis illumination.

So, a bit of contra-rotation and I may have have nulled the off axis illumination.

I'll need better conditions to be sure this doesn't push anything off-band.
Which is exactly what it looked like on today's [very poor] images before the rotation exercise.
Lighter and NO detail to the West! Darker and surprising detail to the east.

7.11.2020 12.04 b1200 1.6x GPC.jpg (44.89 KiB) Viewed 375 times

7.11.2020 12.04 b1200 1.6x GPC 2.jpg (54.12 KiB) Viewed 375 times

What do you think about this?