Hello...
I was about to take an afternoon nap (1st day of summer hollydays for me) and i decided to check on GONG....
There seem to be a flare ; so I checked with my spectro coronagraph. The sky was becoming hazy so I had to use the 2400 lines...
and here is what I got !!
I didnt get it from the beginning... but still I think its the biggest I could catch since i started in 1998 with the spectro wide slit !
At the end , the sky became so white that now I cant see anything...(thats why the last photo is bad )
Chris
huge flare today with spectro coro 27th may 2023
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huge flare today with spectro coro 27th may 2023
spectro-coronographe ,Bresser 127/1200 ; Bresser 102/1350 , ASI 178MM
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Re: huge flare today with spectro coro 27th may 2023
Hi,
Your Spectrocoronagraph images are always awsome
Your Spectrocoronagraph images are always awsome
regards Rainer
Observatorio Real de 14
San Luis Potosi Mexico
North 22° West 101°
Observatorio Real de 14
San Luis Potosi Mexico
North 22° West 101°
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Re: huge flare today with spectro coro 27th may 2023
thanks a lot
usually I try to image with a 600 or 1200 lines/mm to get very fine details but the sky was so bright and milky that i couldnt see anything with them. The 2400 gave great contrast but the images are much prone to deformation due to Doppler effect
usually I try to image with a 600 or 1200 lines/mm to get very fine details but the sky was so bright and milky that i couldnt see anything with them. The 2400 gave great contrast but the images are much prone to deformation due to Doppler effect
spectro-coronographe ,Bresser 127/1200 ; Bresser 102/1350 , ASI 178MM
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Re: huge flare today with spectro coro 27th may 2023
thank youuuuuu ^^
but guess what ?.. Not only i've just found out that The loss of quality in my photos compared to what I actually see came from the fact that i didnt know that it was best to extract the images from the SER files into TIFF or BMP format instead of JPEG!!! And also I discovered yesterday that Autostackaert allows to save the stacked photo in TIFF!!!
So now i'll be able to take better photos
...ANd the worst stupid mistake : For this big flare I oriented the 2400 lines grating the wrong way so the image is distorted!!! arrrgllll...
Never mind ; I learned 2 new things that's going to help me getting better results...
To give an idea of the true quality here are 2 photos taken the May 26th...
CLICK to enlarge in full "HD"..
but guess what ?.. Not only i've just found out that The loss of quality in my photos compared to what I actually see came from the fact that i didnt know that it was best to extract the images from the SER files into TIFF or BMP format instead of JPEG!!! And also I discovered yesterday that Autostackaert allows to save the stacked photo in TIFF!!!
So now i'll be able to take better photos
...ANd the worst stupid mistake : For this big flare I oriented the 2400 lines grating the wrong way so the image is distorted!!! arrrgllll...
Never mind ; I learned 2 new things that's going to help me getting better results...
To give an idea of the true quality here are 2 photos taken the May 26th...
CLICK to enlarge in full "HD"..
spectro-coronographe ,Bresser 127/1200 ; Bresser 102/1350 , ASI 178MM
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Re: huge flare today with spectro coro 27th may 2023
@highfnum
hi
that makes me think at something : what format are you extracting you images from ? AVI or SER ?( when you are using the wide slit method) Are you treating your images in TIFF or BMP or like I used to do in JPEG ? it seems it can make a huge difference. And I'd say did you check the orientation of your grating ? I noticed that if the blazed surface (for a blazed grating) isnt turned toward the chamber objective lens the image is dimmer and could be distorted. The higher the number the lines/mm the more it'll be deformed.
hi
that makes me think at something : what format are you extracting you images from ? AVI or SER ?( when you are using the wide slit method) Are you treating your images in TIFF or BMP or like I used to do in JPEG ? it seems it can make a huge difference. And I'd say did you check the orientation of your grating ? I noticed that if the blazed surface (for a blazed grating) isnt turned toward the chamber objective lens the image is dimmer and could be distorted. The higher the number the lines/mm the more it'll be deformed.
spectro-coronographe ,Bresser 127/1200 ; Bresser 102/1350 , ASI 178MM