1.08.2022 AR13068

[Rusted]

Soft and shaky seeing made focusing pure guesswork.
50/1000 frames stacked. Last capture before the trees swallowed my sun.
PST Etalon sweet spot woes meant heavy cropping.
Stop laughing!

1.08.2022 18.49 2.6x.jpg (97.48 KiB) Viewed 256 times

[marktownley]

That's ok Chris, don't be hard on yourself!

[MAURITS]

Lovely images Chris.

[Montana]

That's a real beauty!! no laughing here, just admiring

Alexandra

[arnedanielsen]

Very nice Chris!

Best regards,
Arne

[ffellah]

Nice one Chris

Franco

[HAL]

This is from a PST? Amazing!

[Rusted]

Thank you all for your kind words.

I am struggling with very uneven results from my PST etalon again.
Cropping the final image increases the "enlargement."
Which softens the results even more than the poor seeing manages on its own.

In the past I was able to compensate by rotating the Lunt BF1200.
Now this tactic seems not to have much effect.

I have a very clear and darker ring of detail.
With much brighter and softer areas just outside the ring
So I have to get the ROI under that ring.
Then crop hard to get rid of the unwanted areas.

It may be time to try aperture reduction.
Though I haven't had much luck with that in the past.

[Rusted]

This is from a PST? Amazing!

Thanks. I am using a PST etalon in a 150mm f/10 refractor. The little PST etalon was never intended for this duty.
Such modifications inevitably push the boundaries of what is theoretically possible. Albeit at a much lower price than a larger etalon.
Larger Lunt etalons, discussed here as successful donors, are suffering from many months of delays on delivery.