New sunspot on Aug 2

[gabrieli]

This was taken just before the clouds moved in. I used the following setup :

Baader 3.8 film + AR152 + 2.5X Powermate + (UV/IR cut + 685 IR pass) + PGR G3 2.8 Mp - the two filters pass a narrow dark red colour.

9w.jpg (416.78 KiB) Viewed 1833 times

9wc.jpg (612.92 KiB) Viewed 1833 times

Lou

[xn44]

Good image !

[ffellah]

Nice image, Lou !

Franco

[Montana]

A very large area of faculae around this spot, lovely details
Alexandra

[Derek Klepp]

Thanks Lou clouds came in here today as well.

[MapleRidge]

Very sharp Lou

Interesting filter combo...a sliver of near IR spectrum being passed I assume.

Brian

[michael.h.f.wilkinson]

Lovely detail in those images

[Carbon60]

Good to see AR2665 back again, though somewhat diminished.

Nice image.

Stu.

[yltansg]

Hi Lou,

Nice capture of AR2665!

Alfred

[gabrieli]

Thanks, all.

I noticed some years ago that when I bundled these 2 filters they would produce a very narrow bandpass at about 670 nm according to their
spectral curves. The contrast and ability to calm the seeing is very noticeable. I also found that a Baader SII filter has a very sharp (very steep wings) spectral curve that is entered around 670nm which also produces similar results.

Lou

[marktownley]

Good shot Lou!