The Great Globular Cluster in Hercules (ヘラクレス座の大球状星団) Messier13

Since it is cloudy every day, I am adjusting the collimation of RC10, but I could not make the final adjustment with the stars after rough adjustment because there were no stars.
Last night I finally saw a star that didn't sway, so I was able to make the final adjustments, but when the remaining adjustments were around 20%, I really wanted to shoot, so I shot it to check the collimation.
I tried to suppress the light in the center as much as possible.

連日曇りなのでRC10のコリメーション調整しているが、ラフ調整後の星での最終調整が星がなくてできなかった。
昨晩はやっとゆらゆらしない星が見えたので最終調整を実行できたが、残りの調整が20%位の時にどうしても撮影したくなり、コリメーションの確認を兼ねて撮影した。
中心部の光を極力抑え込んでみた。

Place: Backyard East Pattaya (Bortle Class 6, Moon Phase 59.0%)
Shot Date :22nd / Apr / 2022 03:26 (UTC+7) Start
TS RC10 Truss Prime Focus(250mm F/8 f/2000mm)
filter: SVbony RGB
Red: 33X60 secs 33 minutes
Green:33X60 secs 33 minutes
Blue: 32X60 secs 32 minutes
Total 1hours 37 minutes
Palette: RGB
Gain: 120 Offset 30,BIN2
CCD: ASI294mm Pro
Mount :iOptron CEM70G
Guide: SVbony 60mm F/4 f/240mm , QHY 290C
Controler:NINA,PHD2 Dithering 5pix, 2 frames each
Pre-Processing APP
Post-Processing PI,PS
Shot By Taro Seki Astropical.uk

M13_RGB_1_ABE_Deise-Edit01-Finish