M20 at 950mmF/L

Discussion in 'My Astrophotos' started by ROBERT T SCHAEFER JR, Apr 12, 2019 at 11:51 PM.

  1. ROBERT T SCHAEFER JR

    ROBERT T SCHAEFER JR Standard User

    Joined:
    May 13, 2018
    Messages:
    115
    CanonEOSII RebelT7i 'modified UV-IR @ Hutech' thru a Baader UV-IR 2 in. filter thru a
    TeleVue .8XReducer/Flattener for 950mmF/L using a 152mm A+M Refractor(OfficinaStellare) on
    an Astro-Physics 1200GTO '2010' Mount and various exposures from 47secISO12800 and
    90secISO6400 and 118secISO3200 and 178secISO1600 for thirteen total 16BIT TIFFs 'AstrometricSum'
    stacked in MaximDLPro V6.16 and then the IEEEFloat 16BIT FITS was then put into "ImagesPlus' for
    various commands and then back into MaximDLPro . This image is not cropped to show the Trifid size
    at this focal-length … and I'm trying to get the Trifid with the Canon 6D thru two 2XPowerMates for
    4800mmF/L without cropping the image and hope to get enough 'photons' for a similar looking Trifid
    like in this image .x
    I tried a few for 30secISO25000 but they were too etched , so I figure at 950mmF/L the exposures
    should be about 2min. and longer for whatever ISO is used to get enough 'photons' to show an 'object' .
    And at least 1 minute Interval-between images so the DSLR has time to download and process to the 'card' .x
     

Share This Page