I tried mixture of frames taken with and without dual narrow filter, though there were poor hydrogen-alpha and Oiii emissions except Sh2-174 in the field. The field was including Polaris. Frames rotated in imaging with autoguiding on, and I made autoguiding off.
equipment: Askar FMA180 Pro and Canon EOS R6-SP5, modified by Seo-san on ZWO AM5 Equatorial mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, ZWO ASI 120MM-mini without autoguiding
exposure: 6 times x 900 seconds, 5 x 240 sec, and 17 x 60 seconds at ISO 1,600 with Canon Clear Filter and 5 times 1,800 seconds with Optolong L-ultimate Dual 3nm Filter at f/4.5
site: 1,770m above sea level at lat. 35 22 22 North and long. 138 41 03 East on the western slope of Mt.Fuji 山梨県 南都留郡 鳴沢村 林道軽水線 終点
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