测试光害滤镜 ZWO Seestar S50 with Antlia Triband RGB Ultra filter
分类: 观测报告 Observations, 器材情报 Equipment
2023-09-20
昨夜天气不错，开车到新界西基地继续玩Seestar，先趁月落前在路旁拍一下月亮，到埗拍几个深空天体，特别试用了第三方的遮罩及Antlia Triband RGB Ultra光害滤镜，这个在香港这种光害严重而又想拍全光谱目标如星团、星系及反射星云来说特别有效， https://eshop.astro.hk/hk/catalogs/products/addf858f-6782-4c57-b8a6-edd39b5abb04 不过因为大气透明度还是略低，所以M20的蓝色云气及七姊妹星团的云气表现力仍不足，另一原因是因为基地四週植被较多湿度较高，所以滤镜很容易结露水，局限了曝光时间。今间晚加防露发热带试试。我们这週六晚的观星实习，会示范Seestar操作方法并用Celestron EdgeHD14大镜看土星及木星 https://www.facebook.com/groups/1836992643243753/permalink/3645151759094490/
下一批Seestar已经发货，预计本週五台下週一可以交付给9月14日中午前下单的爱好者，有兴趣的可以支付10%订金预订，https://eshop.astro.hk/hk/catalogs/products/0fdc1b1f-989e-4f8b-92e5-be7d10ef51d9
Last night the weather was nice, so I drove to our base in the New Territories west to continue playing with Seestar. Before the moon set, I took a photo of the moon by the roadside, and then I captured several deep sky objects after that. I specifically tried using a third-party dewshield and the Antlia Triband RGB Ultra light pollution filter https://eshop.astro.hk/en/catalogs/products/addf858f-6782-4c57-b8a6-edd39b5abb04 In a place like Hong Kong with severe light pollution, it is particularly effective for capturing full spectrum targets such as star clusters, galaxies, and reflection nebulae. However, due to slightly low atmospheric transparency and the presence of vegetation and higher humidity around the base, the performance of capturing the blue clouds of M20 and the clouds of the Pleiades star cluster was still insufficient. Another reason is that the filter easily gets dew on it, limiting the exposure time. I will try using a dew heater tonight to prevent that. This Saturday evening's stargazing workshop will demonstrate the operation of Seestar and use the Celestron EdgeHD14 telescope to observe Saturn and Jupiter. https://www.facebook.com/groups/1836992643243753/permalink/3645151759094490/
The next batch of Seestar has been shipped, and it is expected that enthusiasts who placed their orders before noon on September 14th can receive it by next Monday. If you're interested, you can pre-order by paying a 10% deposit at https://eshop.astro.hk/en/catalogs/products/0fdc1b1f-989e-4f8b-92e5-be7d10ef51d9.
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