Celestial hemisphere:  Southern  ·  Constellation: Orion (Ori)  ·  Contains:  41 Ori A)  ·  41 Ori C  ·  41 Ori D  ·  41 the01 Ori  ·  42 Ori)  ·  42 c Ori  ·  43 Ori)  ·  44 Ori)  ·  44 iot Ori  ·  45 Ori  ·  Great Orion Nebula  ·  HD36365  ·  HD36366  ·  HD36395  ·  HD36430  ·  HD36487  ·  HD36528  ·  HD36539  ·  HD36540  ·  HD36541  ·  HD36559  ·  HD36560  ·  HD36606  ·  HD36629  ·  HD36655  ·  HD36670  ·  HD36671  ·  HD36713  ·  HD36782  ·  HD36813  ·  And 86 more.
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M42 - DSI III Pro and Samyang 135mm lens, Tom Gray

M42 - DSI III Pro and Samyang 135mm lens

Revision title: GIF - mono to colour

Getting plate-solving status, please wait...
M42 - DSI III Pro and Samyang 135mm lens, Tom Gray

M42 - DSI III Pro and Samyang 135mm lens

Revision title: GIF - mono to colour

Equipment

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Acquisition details

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Description

A test shot of the sword of Orion with my DSI III Pro CCD camera attached to my Samyang lens. This required some modification to achieve the correct backspace (outlined in Rev B). I’ve also made use of my ‘drinks holder’ to hold my OSC and wider angle lenses (Rev C). This will allow me to capture NB data as well as colour data. The Meade DSI CCD has 6.45 pixels so seriously under-sampled,  but drizzle allows me to achieve similar pixel scales. Now all I need to work out is how to operate both cameras at the same time from a single Pi computer - theoretically possible with INDI EKOS, but will require some more experimentation. A project for our cloudy nights

Comments

Revisions

  • M42 - DSI III Pro and Samyang 135mm lens, Tom Gray
    Original
  • M42 - DSI III Pro and Samyang 135mm lens, Tom Gray
    B
  • M42 - DSI III Pro and Samyang 135mm lens, Tom Gray
    C
  • M42 - DSI III Pro and Samyang 135mm lens, Tom Gray
    D
  • M42 - DSI III Pro and Samyang 135mm lens, Tom Gray
    E
  • M42 - DSI III Pro and Samyang 135mm lens, Tom Gray
    F
  • Final
    M42 - DSI III Pro and Samyang 135mm lens, Tom Gray
    G

B

Title: The completed rig

Description: I have got an excellent T2 female nose plate adapter for my old DSI III Pro mono CCD camera (courtesy of Jim Henson at Scopestuff), which replaces the ‘light leaky’ Meade filter slide, to attach to my Samyang /Altair filter slide.

Uploaded: ...

C

Title: The camera view

Description: It’s Lent so I have given up alcohol and needed to find another use for my drinks holder / camera ring. I’ve mounted my Altair 183c to my Pentax 28mm SLR lens with a natty adapter from Rother Valley Optics. Again no fine adjustment yet. The aberrations were pretty bad wide open at f2.8, stopping down the lens helps. I managed to achieve a reasonable focus but the gradients from a bright moon and high haze mean that an image will have to wait. Suffice to say I can get Orion, head to toe, in the field of view.

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D

Title: Crop and compare

Description: Cropped original compared with drizzled crop in Ha (Rev E)

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E

Title: Drizzled Ha data cropped

Description: 3960s / 1 hour data in Ha 7nm Baader. Notice how the running man gets run over!

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F

Title: HaRGB combined data with data collected 13/12/23

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G

Title: GIF - mono to colour

Description: ‘Hi-res’ GIF of L, Ha and HaRGB images, made with Ezgif.com

Uploaded: ...

Sky plot

Sky plot

Histogram

M42 - DSI III Pro and Samyang 135mm lens, Tom Gray