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  1. Galleries
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  3. Astrophotography
  4. » m101 - The Pinwheel Galaxy in Ursa Major

 
m101 - The Pinwheel Galaxy in Ursa Major...

Astrofotografia

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m101 - The Pinwheel Galaxy in Ursa Major sent on April 11, 2017 (14:50) by Marcojetflyer. 5 comments, 1124 views.

Ho ripreso, nell'arco di due nottate consecutive, 40 immagini FITS da 4 minuti l'una con CCD Meade DSI III Pro, filtro IDAS LPS-P2, Celestron C6 SCT a f/5 (ottenuto con riduttore Meade .33X) su montatura Celestron CG5, autoguida con Magzero MZ-5m e PHD2. Luogo delle riprese: Volpiano (Torino). Elaborazione: CCDStack e Photoshop. Date scatti: 03 e 05/04/2017


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avatarsenior
sent on April 11, 2017 (16:59) | This comment has been automatically translated (show/hide original)

Beautiful!! But the core have reduced the diameter as you ?? or is thanks to the 'IDAS that "freezes" a little light ?? Excuse the obvious question that might ...

avatarjunior
sent on April 11, 2017 (19:20) | This comment has been automatically translated (show/hide original)


avatarjunior
sent on April 11, 2017 (21:59) | This comment has been translated

Excellent!

avatarsenior
sent on April 12, 2017 (8:04) | This comment has been automatically translated (show/hide original)

Very clear, thanks Marco..terrò in mind your advice !! ;-)

avatarjunior
sent on April 12, 2017 (14:00) | This comment has been automatically translated (show/hide original)

Hello Elio,
I thank you for the appreciation ;-)
At the cost of passing through perfectionist, I recognize that the stars in the outer zone of the image are a bit 'distorted, where the ends completely illuminated area from the reducer Meade .33X ... the main subject, M101, lying in the image center is output good.
I tried to squeeze the C6 with this reducer to a focal ratio as fast as possible (consistent with an acceptable yield), positioning the sensor approximately 30mm from the rear lens I got about f / 4.5, much better than the f / 10 native: -D
So I was able to contain the exposure times
Best wishes
Marco


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