Observation by Markys: M27 OIII filter

Uploaded by

Markys

Observer

Markys

Observed

2016 Oct 02 - 22:52

Uploaded

2016 Nov 01 - 08:56

Objects

The Apple Core Nebula (M27)

Constellation

Vulpecula

Equipment

Celestron XLT120 refractor
Celestron focal length reducer
IMGOH QHY CCD colour camera
O-III filter

Exposure

40 second exposures. 5 lights, 1 darks, 0 bias frames

Location

Farnham, Surrey, UK.

Target name

M27 Dumbbell nebula - imaged using O-III filter

Title

M27 OIII filter

About this image

M27 imaged and then imaged using O-III filter. Checking focus between visible and filter a challenge for my scope. A Bahtinov mask can be used but focus takes a long time since we need to integrate for many tens of seconds to reveal any detail! But the M27 imaged in O-III was very clear and in future planned observations, I will create many more lights of both O-III and visible before blending the two images in Gimp.

Files associated with this observation

021016f_blended_vis_O2_0.png (704.7 kB)

Like this image

Jeremy Shears, John Chuter

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