Sunday, March 31, 2024

Sol'ex images : Impact of fps on X/Y ratio

Impact of exposure time on the X/Y ratio of Sol'ex solar image.
According SIMSPEC SHG version V1.6, by Ken Harrison the theoretical result of X/Y ratio 1 should be 4.43ms or 225fps for my set up : TLAPO60/360 f/6 with ASI290MM and scanspeed 16x.
When lowering the speed form 3.38 to 4.04, the shape moved from an ellips towards a circle. Not yet perfect but it proves the theory. 

Sun H-Alpha using Sol'ex

This morning the clouds dissapeared for about half hour, enough to make some images of the sun using my Sol'ex. 

Setting: 
* TLAPO60/360 f/6 with ASI290MM on Sol'Ex in H-alpha
* Software : Sharpcap 
* Tilt : +3.5 to -4,5°
* ROI : 1936 *276, Mono16, binning 1x1
* Exposure time between 294fps and 245fps
* Speed 16x 
* Analyzing : Inti and JSolex
* Editing and stacking : CS4, AS4!, AstroSurface




Saturday, March 30, 2024

Comet 12P/Pons Brooks

Finally, I was able to set up my EQAZ6 mount to capture the Comet 12P/Pons Brooks. Unfortunately a lot of clouds but I could use 3 pictures of each 60s exposure time.

Setting: TLAPO80/480 f/6 with ASI2600MC
Filter: Optolong L-Pro
Lights: 3x60s
Software: SharpCap 4.1, APP, CS4







Sol'Ex article in Magazine "Heelal"

Our article of the Sol'Ex project with Helios collegue Walter, Johan and myself is published in magazine Heelal (vol 69, nr 4, april 2024, p11-13). For the full article see this link. 



Thursday, March 28, 2024

150.000 Visitors and Comet 12P/Pons Brooks

 


Celebrating 150.000 visitors since the start of my blog and I'm doing this with my picture I took this evening of Comet 12P/Pons Brooks.

Setting: TLAPO80/480 f/6 with Nikon D7500
Filter:Optolong L-Pro
Mount: Manfrotto
Exposure : ISO16000, 2x2s
Software: DNG converter and CS4


Comet 12P/Pons Brooks with telelens

 


Image of Comet 12P/Pons-Brooks taken on Wednesday March 27. Some high clouds but still, when looking good you will recognize two tails.

Setting: Nikon D7500 f/5.6 200mm telelens, 39x2s on ISO12500. High ISO to prevent startrailing.
Stacking was done with APP 2.0.0 beta version 26. It took some time as settings were not correct.

Tuesday, March 26, 2024

Circumscribed Halo



At noon the Sun came out with a halo round it. Beside the 22° halo, there was also a circumscribed halo above the Sun and the parhelic circle. After editing the picture, I found also the lower circumscribed halo.
According Meteoros.de website  i could simulate my image.