Observation by Simon Dawes: The Terminator at 1st Quarter

Uploaded by

Simon Dawes

Observer

Simon Dawes

Observed

2020 Mar 02 - 19:59

Uploaded

2020 Mar 04 - 22:15

Objects

The Moon

Equipment

Sky Watcher MN190
ZWO ASI1600 PRO
EQ6

Exposure

1500 of 3000 frames @8bit each frame was ~30ms

Location

Bexleyheath, Kent (S.E. London really), England

Target name

The Moon

Title

The Terminator at 1st Quarter

About this image

I hope you like the image, I love scrolling around the Moon looking at its features, I can spend hours lost in it - if you have a high res display it is worth zooming in past the 100% mark - at least on my monitor I find this reveals more features that are just too small at 100% on a high res 'retina' type display.

For this image I experimented with 1500 frames at 16bit depth (12 bit really) and 3000 frames at 8bit depth, keeping 50% of the frames in the stack in both cases, the 8bit depth video was quicker to take and stack (despite more frames) and gave better results, I guess the number of frames trumps bit depth in this case.

The original video was ~45GB in size this jpg image is ~232KB which when you think about it is an amazing compression ratio, the final Tiff with layers preserved is 118MB.

Sharpening was completed in photoshop using varying sizes of un-sharp masks (I have a macro so it only takes 30s to do :-) )

Files associated with this observation

The Moon 2020-03-02 1959 8bit 1500 of 3000 BAA.jpg (232.4 kB)

Like this image

Clive Nanson, Bill Leatherbarrow, Mr Leonard Entwisle, Ray Emery, Andy Wilson, Jeremy Shears, Andrew Dumbleton, Honor Wheeler, Simon Dawes

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