Nice results with the new PST Etalon. Does it go behind the Quark?

Great close ups Arne, lots of detail in there.

Beautiful scope Petr, these images are good, first 3 are my favourites.

rigel123 wrote: ↑Tue Sep 26, 2023 11:38 am Thanks Dennis, Petr, Franco and Martin! Really appreciated the advice I got earlier about masking the scope down for better contrast on the CaK images.

I wonder if using a telecentric or uv capable barlow in front of the ca-k filter would not do similar, but without reducing the aperture.

Wow, beautiful ca-k images Mark. Its nice to see how even more narrow bandwiths can look here.

Beautiful FD and animation Warren, the contrasty ca-k ones are great.

Well done Franco, interesting to see h-line.

Nice full disk and especially closeups Stu, thx for sharing

Nice ones Eric. A complete overview.

Looks like yellow press to me..

Great images Leo, it seems to be a unwritten law that whenever flaring is happening the seeing gets bad for an animation. Had that happen too.

Great images! Glad it's working. The focuser after the etalon is for fine adjustment? -Derek Thx Petr and Derek, - the focuser is a provisorium because i didnt have another adapter at hand (and the lid with the male t2 version didnt get printet well).. it will be replaced by a t2 -> 2" adapter...

This softening of the image is also seen in the following 2 shots, first 80mm f15 double stack, second 80mm f15 triple stack. CAmera was zwo290mm. https://live.staticflickr.com/65535/53209785944_7bc2d948b2_o.jpg ar13445 CaK DS1a 80mm f15 zwo290mm by Mark Townley , on Flickr https://live.staticflick...

Thx Arne.

..and some bonus WL images from 2 of the same areas with the Antlia 3nm OIII filter.

Hi, today i tried to double stack my Quark Chrom with the recently aquired Lunt 40mm scope etalon. Seeing was medium / ok for my location. For the mod i used the 3d files that Derek aka Oak made (https://solarchatforum.com/viewtopic.php?t=35857). I printed the parts and painted the inside of the cas...

Would it be difficult to make a etalon based filter like the Suna or Sundancer 2 just for Ca-K with h-a like fwhms? Maybe they would make a run if enough people would want one..

Thanks all : )

Nice one Stu, glad you could fix the equipment.
Seeing is going down the toilet here too as soon as the heating season begins.

Very nice images Alfred, would you mind sharing some imaging details like fps, exposures, gain? Hi Dennis, Camera: Basler acA1920-155um For disk images, I captured 2000frames at mean frame rate of 141 FPS, exposure of 7mSec and Gain 22105. Stacked 300frames. For Proms, captured 900 frames at mean f...

These images are excellent, congrats!

Nice full disks Franco, showing a quite active sun.

Very nice work Arne, beautiful animations.

Hi,
today i tried the sunspot group again and things went better then last time. Clouds with few gaps but i was lucky.

Quark Chromosphere + Daystar reducer.
100 best of 2231 images, 6.7ms exposures, 148fps, gain: 0, imx462

Thx for looking and nice weekend,
Dennis

Good images James, you can see that the seeing is actually good in the wl images. The turbulences are making them a little bit patchy. Lowering exposure time to 6ms and below might help here.