Lousy weather improved LMC Mosaic Image

[glenc (Glen)]

Bert, that is a magnificent image.

[avandonk]

Thats a good result Greg. If you want to play with the 120MB 16bit tiff PM me your snail address and I will mail you a CD with the images. Unless you have somewhere I can FTP the file.

My personal taste is to try and show the full dynamic range without 'enhancement' but your version is more striking. The longer I spend at this processing caper the more I realize I don't know.

Thanks for the comments folks. One day I might get an image that cannot be improved apon, although I doubt it.

Jase at my light polluted site gradients are the main curse I have to deal with once the clouds have cleared. Clouds can be handy when they cover Melbourne and SE suburbs and if it is clear in Eltham it almost gets to the conditions of a dark site.

Bert

[avandonk]

The other trick that seemed to work better was splitting the image into RGB tiffs and using GradientXterminator on each colour and then recombining. That way there was no crossover between colour channels a far as faint colour cast went or faint real image data being unduly suppressed.

Bert

[avandonk]

Originally Posted by AlexN

I know I know.. I studied physics at RMIT in Melbourne a few years back.. I always got in trouble for writing -0° instead below 0° during when we were talking thermal dynamics.

I studied Physics at RMIT in the late sixties early seventies part time. The old Physics building was where Story Hall is now. When running long experiments one was prone to cross Swanston Street and go over to the Oxford Hotel which was just opposite to imbibe a few betwween collecting data. Nothing has changed!

We never used the the shorthand you use. It is most probably a product of shorthand induced by the pressures of the lack of time and the digital age.

Bert

[skeltz (Rob)]

Nice going bert ,that camera has to be the smallest fridge i have ever seen

[AlexN]

Originally Posted by avandonk

I studied Physics at RMIT in the late sixties early seventies part time. The old Physics building was where Story Hall is now. When running long experiments one was prone to cross Swanston Street and go over to the Oxford Hotel which was just opposite to imbibe a few betwween collecting data. Nothing has changed!

We never used the the shorthand you use. It is most probably a product of shorthand induced by the pressures of the lack of time and the digital age.

Bert

The short hand probably was introduced due to people not being bothered to write something out completely after a imbibing a few

[Screwdriverone (Chris)]

Originally Posted by avandonk

Thats a good result Greg. If you want to play with the 120MB 16bit tiff PM me your snail address and I will mail you a CD with the images. Unless you have somewhere I can FTP the file.

Bert

Email Mike (Iceman) for the password to the IIS FTP site (click here for the information on how to upload to the FTP site)

Upload your file there and then make sure you read the info at the bottom on how to get people to your file, it actually lives on http://www.iceinspace.com.au/uploads/filename.zipwhere filename.zip is the file you loaded.

Cheers

Chris

[avandonk]

Originally Posted by jase

Excellent work Bert. The detail in the FOV is memorable. Well done.

I must have missed this comment of yours Jase. Yes the detail is spectacular for a 300mm lens especially at f/2.8. The so called noise is faint barely resolved background stars. If they seem to have a green tinge it is because a Canon CMOS sensor has twice as many green pixels as either blue or red. The theoretical airy disc for f/2.8 is about 4 micron. The Canon 5DH has 8.2 micron pixels so even accounting for all aberrations there will be undersampling. Just do a superposition with registar on a longer focal length optic image and get exactly the same FOV and do a blink comparison.

The Canon 300mm F2.8L has close too 100% MTF to the edge of a 35mm FOV and it it gets to about 90+% at the corner.

Also check out the dark nebula areas or out past the galaxy as there are no faint stars masquerading as green noise.

Bert