Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Proms of May 13th 2022 with spectro and new ASI 178MM

Solar
  • Please log in to reply
2 replies to this topic

#1 chrishalpha2017

chrishalpha2017

    Mariner 2

  • -----
  • topic starter
  • Posts: 203
  • Joined: 02 Jun 2017
  • Loc: Paris

Posted 14 May 2022 - 12:14 PM

hello,

 

I finally bought a new camera : ZWO ASI 178MM : pixels are much smaller that the ASI 120MM that I had  (2.4 vs 3.75 um) and the chip is bigger too with means 2 things for me : beeing able to image a bigger part of the sun's limb and sampling at k=3 with the Bresser 127/1200 ; wich means no need to use a barlow lens . No more need to do flats either as there arent fringes due to barlow lens.

 

so, here are what I got with it yesterday.

 

I also noticed somethinf i'm gonna work on : I already noticed that the more grooves the grating I used had , the more shrunk the image was getting. So I tried a 600gr/mm grating (like Secchi had) and the result is interesting . The images have more fine details. It seems that the anamorphosis "destroys" d├ętails in this technique.  I have to make more tests..

 

Click on the image to see them full size..

 

20220513155412Ch.jpg

 

13_32_50_Soleil  H alpha_13_05_22_F1168-1232 bb.jpg

 

 

 

 


  • peterm likes this

#2 chrishalpha2017

chrishalpha2017

    Mariner 2

  • -----
  • topic starter
  • Posts: 203
  • Joined: 02 Jun 2017
  • Loc: Paris

Posted 14 May 2022 - 12:15 PM

14_36_29_Soleil  H alpha_13_05_22_F0897-0987 avec wavelets.jpg

 

15_50_24_Soleil  H alpha_13_05_22_F0628-0912 nn.jpg

 

 


  • peterm likes this

#3 chrishalpha2017

chrishalpha2017

    Mariner 2

  • -----
  • topic starter
  • Posts: 203
  • Joined: 02 Jun 2017
  • Loc: Paris

Posted 14 May 2022 - 12:18 PM

kjio_20220513_062936.678_UT+++++.jpg

 

 

mode coro 2+.jpg

 

 

 

Of course , when i use a 600 gr/mm diffraction grating there is more light and i have to close the slit a bit more but it really seems that they are more details and the height and size of the proms are closer than what i can see on photos taken by  you guys that have a real h alpha filter :)

 

 

Chris

 

 


  • peterm likes this


CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics





Also tagged with one or more of these keywords: Solar



Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics