Shots from the Burren

Mind you, I can't imagine a better way to ensure a sprained anckel than walking along limestone pavements in the dark!

It's tricky alright.
You just gotta have good balance!

Frank have you tried or are you using the HDR

never heard that.
?

Frank have you tried or are you using the HDR

never heard that.
?

It's a way of combining multiple exposures at different apertures into a single image. This means you don't get your highlights blown out or your shadows washed out. It's ideal for situations with a high dynamic range, i.e. both very bright and very dark areas in the same shot.

TBH that doesn' really apply to Astronomy in general. Perhaps it might be useful for moon shots so you can see both the earthshine and the rest of the moon but that's about the only Astronomical application I can think of.

Anyhow, I've been experimenting with it a fair bit: www.bartbusschots.ie/blog/?p=701

Bart.

I did a google for HDR and Tone Mapping,
Hugely interesting techniques there.

I have used HDR in the past on the orion nebula and it works greats but does take some experimenting to get right, the trick is to get the right range of exposures to play around with in the first place.

Fabulous shots Frank.

I've used HDR a few times on the moon, it can work well, but I don't see how you could use it on a moving starfield and static background. It really can improve other types of shot though, for instance I take photographs for my SIL of all her oil paintings and by combining three different exposure you can really bring out the 3 dimensional texture of the painting.

? never heard of it been used like John, from an astro point if view isn't it used for imaging objects with a very wide range in brightness such as nebulae, so you end up with the outer faint areas while not having an over exposed inner core.