NGC 6388 - a challenge of globular cluster

[jsmoraes]

A very difficult globular to shot. You need a very good focus to resolve the stars inside the dense nucleous, and chose very well the time of exposition and ISO to don't saturate the image.

work done at 2013

work done at 2015

[MarsG76]

Nice globulars, I think the 2013 shot is my fav out of these.

[JamesF]

I'd agree.  The core is better controlled in the 2013 image.

James

[jsmoraes]

Yes, I agree. 2013 image is better than 2015. Less ISO and better focus.

2013 was done with Canon 350D - ISO 200 - 21 x 2 min (42 min) - If you click on the image you can see it with actual resolution

2015 was done with Canon 1100D - ISO 800 - 5 x 2 min (10 min)

The visibility and seeing have influence, also.

I will try again with ISO 200. I believe that for this cluster ISO 800 saturates the core.

If you search photos from this cluster at Internet you will see that all them have the core saturated, except those from space telescopes like Hubble and Chandra.

Actually this cluster is very very difficult to shot. It is a challenge ! 

[laudropb]

You have risen to the challenge very well. Lovely images.

[jsmoraes]

Thank you, laudropb.