M95 from Mar 2nd @PTC

[LT]

Went out to PTC for more practice on using cooled CCD camera last week. But transparency was not that good. So not much detail captured on this object.

Taken with Vixen R200SS + MPCC III + Atik 383L mono
Autoguiding: Vixen SX2 + 5cm guiding scope + 2x + QHY5 + PHD
Total integration (L:R=G=B) = 10x240s: 4x240s(binning 2x2) each RGB channel
Sensor's temperature set = -15C
Transparency = 5/10

Each channel stacked in DSS and LRGB combined in PI with darks calibrated only.

[anyone]

[Steve]

是不是sensor有些麈點

[宇隆-天文滤镜]

是不是sensor有些麈點

感觉有些不太像，太多不均匀的了。灰点的话，在图像上应该是黑点，不是同心圆的点

[johnshek2011]

當日小弟亦在PTC幸會LT兄，
兄對控制反射鏡及拍攝之造詣甚深，
佩服！
LT兄之相亦很美！

[cometboy]

是CCD上的霉或冷冻太快所形成的水点？

[LT]

塵！

其它的不圴勻噪粒，是人工平場不配合真平場引起的。

[LT]

當日小弟亦在PTC幸會LT兄，
兄對控制反射鏡及拍攝之造詣甚深，
佩服！
LT兄之相亦很美！

過獎了。

[LT]

希望5月完成改鏡任務 + 用回Vixen給R200SS的corrector PH，有較好的透明度下，再影過。

[Eddy So]

好圖！