Celestial hemisphere:  Northern  ·  Constellation: Cancer (Cnc)  ·  Contains:  38 Cnc  ·  39 Cnc  ·  40 Cnc  ·  41 eps Cnc  ·  42 Cnc  ·  Beehive  ·  Beehive cluster  ·  HD73175  ·  HD73210  ·  HD73294  ·  HD73330  ·  HD73345  ·  HD73397  ·  HD73429  ·  HD73430  ·  HD73449  ·  HD73450  ·  HD73487  ·  HD73533  ·  HD73574  ·  HD73576  ·  HD73597  ·  HD73598  ·  HD73616  ·  HD73617  ·  HD73618  ·  HD73619  ·  HD73640  ·  HD73641  ·  HD73642  ·  And 34 more.
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M44, Dirk Schwarze
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M44

Getting plate-solving status, please wait...
M44, Dirk Schwarze
Powered byPixInsight

M44

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Description

Short tests to analyze a problem with the blue filter and the Skywatcher Evostar 72 ED.

I had bloated stars on the blue channel, probably caused by UV light. Tried to fix it by putting an additional Explore Scientific CLS Filter in the light path, which blocks light below 420 nm. Seems to wok, no more blue halos....

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M44, Dirk Schwarze