Lagoon Trifid Mosaic Another View

[avandonk]

With the very cloudy wet weather have managed to get more data.

Medium image here 8MB

http://d1355990.i49.quadrahosting.com.au/2011_08/mosLT_1&4.jpg


There is still some thin cloud making things difficult.

Bert

[Paul Haese]

Pretty nice overall Bert, but there is a heavy emphasis on the blue stars and not much on the orange/yellow/red stars in the field. Not sure what your thoughts are on this, but I would have thought this area would look more golden than blue. Just something to think about maybe.

[Ross G]

Two coloured fish swimming upstream!

A great photo Bert.


Ross.

[multiweb]

Very nice - I like those small dust lanes, almost like tiger stripes. Not often seen :thumbsup:

[avandonk]

Here are more tiger stripes with all four panels

medium image 16MB FoV 13.5 X 11.9 degrees including the black bits.

http://d1355990.i49.quadrahosting.com.au/2011_08/P_1&2&3&4_7k_L_10.jpg


Bert

[avandonk]

Here is a full resolution crop which shows the quality of the whole mosaic at original size,

Med image 13MB. FoV 6.2 X 5.7 degrees

http://d1355990.i49.quadrahosting.com.au/2011_08/LT_C1_10_.jpg


Bert

[iceman]

Beautiful, Bert.
Can't wait to see the final version.

[atalas]

Nice work Bert....I think one of the things I most admire about you work is that your projects are always humungous.

Well done as always.

[avandonk]

Most wide fields suffer from colour haloes around stars. This tends to make uninformed people to think that is the way it looks. These haloes generally overlap so for many years this failing of objective imaging became the norm.

This is a very high resolution image for 300mm optics.

I have a 30" calibrated monitor.

The colour is correct!

Bert

[avandonk]

I cannot compete with the Hubble but I can show you where it has imaged and where it should!

Bert

[John Hothersall]

Wow that is a great field, the HiRes is fantastic to look at, stars are excellent.

John.

[Paul Haese]

Just a question I asked and this is your response. No need to contribute to your threads anymore.

[avandonk]

Looks like my thoughts are unacceptable!

Just go fishing somewhere else.

Bert

[avandonk]

Just because wide fields with less than perfect lenses produce a yellow colour does not mean it is correct.

People will adjust their image so it looks like the last one. It is sad really.

My images have stars with colour and all nebulae are represented in all their subtlety.


I am trying to be objective. It is obvious I have failed.


Bert

[DavidU]

Another great image thanks Bert.

[atalas]

Guys,lets not be angry....life is too short.

[avandonk]

I have seen many images of the Trifid and Lagoon where the stars have no colour because they have saturated the detector beyond it's dynamic range to image the really dim bits of nebulousity and dust.

If you all look carefully my stars still have their intrinsic colour.

Imaging widefields has a problem and that is very high dynamic range.

In my own way I am trying to address this problem.

Do not get upset if my opinion differs with yours. I just gave my best opinion.

Bert

[gregbradley]

Awesome image Bert.

You've really nailed these widefield mosaics and become the master of the art.

It would be great to see a writeup or tutorial of what you have learnt.

I have watched your 5D images develop over the last few years.
You seem to be at the peak here and have all facets completely covered to world class level.

The field is flat and you've corrected for lens distortions and curvature, the blending is invisible, the stars retain their colours and no colour noise, the image is bright and luminous with vividness and easily seen detail and colour seems well balanced and natural. The tracking seems perfect. So many things done really well.


Greg.

[jase]

Excellent on all accounts Bert. I enjoyed the view, in particular how you've emphasised the darker regions providing good contrast. Colours look spot on to me. Well done!

[avandonk]

Greg I will write up how I do these wide fields. A lot of the info is already spread across many previous posts.

I am in the fortunate position where I am retired and can do imaging full time.


All of my equipment is basic and has been enhanced by my own efforts. I do all of this from a suburb called Eltham that is only 16km from Melbourne.


We all enjoy our hobby differently.

I just used my knowledge of Physics to build and finely tune a widefield camera.

The proof is the results.

Bert

[gregbradley]

A writeup would be awesome Bert.

Your images do speak for themselves.

Greg.