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darkskyastronomy

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Posts posted by darkskyastronomy

  1. The Meade 4000 32mm is pretty good optically. The actual lense is embedded much lower than on the Televue, which allows one to get closer to the eyepiece, whilst retaining eye relief. Given the very large eye relief on 32mm eye pieces in general, this can be critical for viewing comfort.

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  2. The important thing is to use a magnification, which should just about frame the entire open cluster.

     

    So for the Pleiades you need very low magnifications <30x , whilst some tiny open clusters might require 100x magnifications.

    If you can only see bits of a star cluster, then you will not recognise it for what it actually is.

  3. Double stars should always be visible, as long as you have no clouds.

    A full moon is the greatest source of light pollution and many DSO hunters switch from DSOs to double stars during full moon periods, as double stars are not really affected.

    Respective double star colours might be a bit blander under light pollution conditions, but the underlying colour trends should be visible, especially for Albireo.

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  4. Detecting DSO colours depends on a range of factors: Sky conditions, nature of one's eye, quality of eyepiece employed, viewing experience.

    - Sky conditions: Clouds or bad transparency, usually lead to no colour detection.

    - Eye nature and experience: Older eyes detect less than younger eyes, but can make up by being used by a much more experienced observer that knows what they are looking for. Some women can see into the Ha red range, which men tend to not be good at.

    - Quality of eyepiece: In my opinion, once one is an advanced amateur astronomer, quality eye pieces can make a difference.

    In the Orion nebula: 

    - Cheap plossl: black and white colour 

    - Quality plossl ( Televue, Baader Ortho Classic): green minty/ blue colour 

    - Top tier eyepiece ( Televue Delite/ Baader Morpheus): green minty/ blue colour plus hints of pink in the Orion Nebula wings.

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