Rho Oph and Mizar 'artifact reflection'

Discussion in 'My Astrophotos' started by ROBERT T SCHAEFER JR, Apr 2, 2019.

  1. ROBERT T SCHAEFER JR

    ROBERT T SCHAEFER JR Cyanogen Customer

    Joined:
    May 13, 2018
    Messages:
    303
    CanonEOS RebelT7i 'modified UV-IR @ Hutech' TeleVue .8XReducer/Flattener for 950mmF/L for 6min , 7min ,
    and 8min exposures at ISO6400 , ISO3200 , and ISO1600 ... the same artifact to the left that looks like a nebula
    must be a glass reflection artifact like in Mizae's image of 44secISO6400 ... I was using a Baader UV-IR 2in. filter
    thru an Orion Polarizing 2in. filter tune down to 90% full light to prevent stray scatter light . Next time I will center
    a bright star at this focal-lenght and try 1minISO6400 and then rotate the StarlightInstruments Focuser and try
    another shot and then do that again and see if the artifact is moving around the star .x { This image shows that
    at this 950mmFL ... the 'blue' color can be brought out which I made it more evident in "ImagesPlus" ... but the
    nebula to the left is the same as in a Mizar image ... so it's a glass reflection artifact .} x
     

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