affinity photo Moon in Colour

[Jeremy_Waller]

Greetings  to All,

Here is a picture of the moon to be included in my  montage of moon phase images in colour. This image is short listed to be included in my montage of moon phase images in colour.

All image processing was done in Affinity Photo (excellent program!)

For those who are interested:

The colour saturation was obtained in a 5 stage  process (5 adjustment layers) of gradually increasing levels of colour saturation. This colour saturation process will amplify colour noise so one must start with a "low noise image.  The low noise image was obtained by stacking 15  images (noise averaging - Greek letter Mu) to give about 4x improvement. For crescent images we might try stacking 25 images for an improvement of x5.

I am trying to find a logical explanation for the green light over the craters.

Regards,

Jeremy.

 

[malayali]

Mind sharing the EXIF?

[Jeremy_Waller]

Greetings Malayali,

EXIF information taken from one of the processed CR3 files:-

Filename - moon_1873.tiff
ImageWidth - 2800
ImageLength - 2800
BitsPerSample - 16 16 16
Compression - 8 (Unknown)
PhotometricInterpretation - 2
Make - Canon
Model - Canon EOS M6 Mark II
StripOffset - 27506108
Orientation - Top left
SamplesPerPixel - 3
RowsPerStrip - 1
StripByteCount - 27494908
XResolution - 72
YResolution - 72
PlanarConfiguration - 1
ResolutionUnit - Inch
DateTime - 2020:06:04 08:28:11
Artist - J R Waller
Copyright -
IPTC/NAA - 27521878
ExifOffset - 27521942
InterColorProfile - 27517418
ExposureTime - 1/160 seconds
FNumber - 0
ExposureProgram - Not defined
ISOSpeedRatings - 100
Recommended Exposure Index - 100
ExifVersion - 0231
DateTimeOriginal - 2020:06:03 19:03:55
ComponentsConfiguration - YCbCr
ShutterSpeedValue - 1/166 seconds
ApertureValue -
ExposureBiasValue - 0
MeteringMode - Spot
Flash - Not fired
FocalLength - 0 mm
UserComment -
SubsecTimeOriginal - 65
ColorSpace - sRGB
ExifImageWidth - 2800
ExifImageHeight - 2800
FocalPlaneXResolution - 7936.15
FocalPlaneYResolution - 7931.62
FocalPlaneResolutionUnit - Inch
ExposureMode - Auto
White Balance - Auto
SceneCaptureType - Standard
Contrast - Normal
Saturation - Normal
Sharpness - Hard
Owner Name -
Serial Number - 885040000027
Lens Model - 0.0 mm
Lens Serial Number - 0000000000

GPS information: -
GPSVersionID - 2.3.0.0

Note:

1. The camera was in a manual mode where the focus was set manually and used the superb focus peaking feature of this camera.

2. The lens is an Astrophysics Starfire EDF130 refractor (130mm diameter / F6.2).

3. Original size is 6984 x 4660 pixels.

I hope this is alright. Need more information ? Just ask!

Jeremy.

 

 

[malayali]

Curious to know, how do you connect a camera to a telescope? Is the quality of photos taken using this setup and super-zoom camera comparable?

[Jeremy_Waller]

Greetings Malayali,

1. Curious to know, how do you connect a camera to a telescope?

Please see the attached photo. There are three adapters visible, from the left (telescope focuser):

1.1. There is a spacer that increases the back focus length.

1.2. Connected to this spacer is a " Wide T-Mount". This mount ends in a Canon fit EF mount so that one may connect a DSLR to the telescope. This mount also allows for the use of larger sensors.

1.3. At the RH end is an adapter that connects my M6 camera back to the EF mount. I  use this adapter to connect my EF lenses to the M6 back.

2. Is the quality of photos taken using this setup and super-zoom camera comparable? 

A Detailed answer to this question would be very long. Here is a short answer:

Camera lenses are designed for a different purpose than lenses for a telescope.

My experience is only with glass made by Takahashi inc. and Astrophysics inc.

Telescope optics are brilliantly corrected and provide a high resolution  instrument par excellence. So given similar conditions these telescope lenses will provide far superior images to those taken by camera lenses.

An example.

I have an "excellent" Canon 85mm F1.2 lens. This lens is brilliant for controlling background blur and separating your subject from the background. It is amazing for taking photos in low light BUT as a lens for taking pictures of the night sky it is woeful. A simple 30s picture of the night sky (you need exceedingly dark skies to use this lens in " astro " service) reveals stars with more chromatic aberration and colour than a cheap refractor !!

I hope this is not long winded.

Some buzz phrases for your research:

" Strehl Ratio " and " Diffraction Limited Optics "

Regards,

Jeremy.

 

[malayali]

Thanks a lot @Jeremy_Waller

[Rudi Bjørn Rasmussen]

know this is an old thread, but @Jeremy_Waller, could you explain in more details how you did the "mineral moon" in affinity?

[Rudi Bjørn Rasmussen]

Well - I found out my self: simply use the saturation shift in HSV...

[parentsqueries]

Oh thanks for great thread.