Rheita valley

I agree with Michael. Super shot but its driving me mad. I am finding it very hard for the craters to be craters and not domes. I have managed to flip them into craters twice for a short period and then back to domes. It must be the time of night and tired eyes.

Kieran

Try rotating the image 90 degrees to the left, Or tilit your head 90 degrees right. Wether you see them as domes or craters will depend on where the light source is coming from. We don't expect to see light coming from below which is why you get a dome illusion.

Nice sharp details Carl - Well done.

Hi all,
Thanks for your comment's all taken in, I see what you mean about the brightness when I'm capturing the image, I'm capturing it to dark. I have to up my gain & shutter speed, because when I try doing brightness & contrast in Photoshop I'm losing alot of detail in the image.

awell you live and learn

Carl,

Two comments in relation in relation to under/overexposing ...

(1) when we overexpose, the data for those pixels is "burned" and can never be recovered
(2) when we underexpose, we have the ability to recover data during processing

Now, when we stack, please remember that the final stacked image will be slightly brighter than the individual frames. As a result, it is best to "slightly" underexpose since the stacking that follows will bring up the final exposure to what it should be.

Of course, what is the right underexposure which will correct itself during stacking? I suggest that you go one stop below what seems perfect on the LCD screen. Also, with video imaging, we have the ability to experiment where we can shoot one or more videos at one exposure setting, a few more videos with a different exposure setting etc.

Hi all,
Thanks for your comment's all taken in, I see what you mean about the brightness when I'm capturing the image, I'm capturing it to dark. I have to up my gain & shutter speed, because when I try doing brightness & contrast in Photoshop I'm losing alot of detail in the image.

awell you live and learn

when it comes to this stuff, there is always tomorrow, presuming the sky is clear .

Dave Grennan wrote:
Look left and it flips to domes. Like a free LSD trip without the drugs


Tony wrote:
I have fallen victim to this effect as well ... I also think it has to do with being tired late at night. Anyway, my remedy is to immediately look away from the screen and then come right back again to the image on the LCD (not LSD ) and you will be fine (the change in focus you experience is what seems to do the trick).

I viewed the image again in the morning on my office PC. The monitor shows a darker image and I had no problems resolving the craters as craters. I checked it again on my laptop and guess what? domes. I wonder if it is a trick on the eyes due to lack of contrast with brighter screens.

Kieran

Kieran,

There is an active thread on this issue in one of the newsgroups and it seems it all has to do with whether the lighting (in the image) is coming from the top and towards down or the converse. When it is the converse, our eyes are fooled and we get the dome illusion.

Apparently if we flip an image producing this effect, it goes away.

I used to hate that, I thought it was my eye site or the toucam was on the way out, glad I'm not the only one who saw them domes.

ps
thanks for all the advice men ,all i need know is some clear skies and good seeing & an act of god to get a good image :lol: :lol: