Posted by Bob Falcone on March 19, 2006 at 9:12 PM
I just got back from our annual spring training trek to Tucson, and of course I wandered out to the desert for some photo ops. By way of pure dumb luck, I scheduled this trip with the fullmoon, and got this...
Shot with my 10D, and Canon 80-200 f/2.8.
Posted by Chuck Peacock on March 20, 2006 at 10:24 AM
Neat!
I'd crop the right side off to make a pano for my taste. Or maybe compose another shot with the moon in the right side somehow - just a thought.
I do see some kind of halo"ing" around the saguaro or maybe it's my freaky monitor here at work.
Bob,
I dig the shot, perfect exposure on the moon and I like the way the arms of the cactus are SO close to catching it! But, I'm seeing a seriously large halo around the cactus itself. Besides that, I like it.
I like the shot, but I'm still seeing the halo. There's been a lot of talk about halos in the images people post. Is it a monitor issue? What causes this?
Posted by Scott Buckel on March 20, 2006 at 12:24 PM
Bob - I to like this image.
Did you over sharpen the image to make the halo that people are commenting about? Or is this from the compression from converting to jpeg?
You know, I've been having the same issues with Haloing, and i wonder if it's a JPEG thing as None of my TIFF or EPS files have halos. Oh Yeah, I like this shot and I'd leave it as in and also try the pano crop just for kicks.
Posted by Bob Falcone on March 20, 2006 at 1:15 PM
Thanks everyone!
This is a re-sized shot for the web, and the halo was due to some sharpening I did before re-sizing it. The full-size (for printing) version doesn't have the halo. I gotta remember to sharpen after resizing!
Posted by Todd Caudle on March 20, 2006 at 3:00 PM
Did you use shadow/highlight in PS? I've seen it cause significant halos. The halos here are about the strongest I've seen that weren't intentional. Seems to be beyond what sharpening, or lack thereof, would produce.
Posted by Scott Buckel on March 20, 2006 at 3:20 PM
Todd -
Do you have a good feel for what shadows/highlights can do?
I saw Darrel Gulin use it to make water look much better and I have not been able to reproduce it. I was shooting right next to him and I tried to reproduce what he did and failed - so it has to ber the operator.
Posted by Chuck Peacock on March 20, 2006 at 5:11 PM
I think I've seen this before when doing just as Bob said - sharpening before resizing.
I'm thinking the less initial halo you have the less it would show after sizing (obviously). I always leave sharpening as my last step in the workflow anyway. I leave all my "archived" tiffs unsharpened.
Posted by Bob Falcone on March 20, 2006 at 9:22 PM
Thanks for the feedback.
As for the halo (which must look much worse on some screens than on mine), I'm 99.9% sure its from sharpening.
There are two stages of sharpening I do, the first of which "polishes" the image, and then the very last stage is the typical sharpening that is done to make up for the anti-aliasing filter in all DSLR's. I always carefully adjust the sharpening in the last stage to compensate for the size of the image. What works for a "full size" image doesn't work well for a much smaller photo (I'm sure we've all seen the ill effects of a photo that was resized after sharpening). In this particular image, I did the "polish" stage and then shrunk it down for the web, and then did the final sharpening afterwards. I just started using this "polish" stage, and am not fully versed with it, and am sure thats whats wrong here.
The good thing is that the print from my inkjet of the full-size image (my proof, not final print) does not exhibit the halo.
I also do like Chuck does, and file my edited shots without sharpening. I also keep the original unedited shots, just in case I have to go all the way back to the beginning and start over.
Posted by Bob Falcone on March 21, 2006 at 1:01 AM
Sorry Scott (and Todd), I have to disagree. I didn't utilize any shadow/highlights adjustments on this image. While I appreciate everyones input, since it is my image, I think I can speak for the process that was used. If this halo was caused by highlight/shadow adjustments, I'm pretty sure it would also show up inthe non-resized image and (as I've indicated before) it does not.
While it is possible that halos can be caused by shadow/highlight adjustments, that is not the case here.
Discussion
11 repliesShot with my 10D, and Canon 80-200 f/2.8.
I'd crop the right side off to make a pano for my taste. Or maybe compose another shot with the moon in the right side somehow - just a thought.
I do see some kind of halo"ing" around the saguaro or maybe it's my freaky monitor here at work.
I dig the shot, perfect exposure on the moon and I like the way the arms of the cactus are SO close to catching it! But, I'm seeing a seriously large halo around the cactus itself. Besides that, I like it.
EDIT: Chuck beat me to it!
I like the shot, but I'm still seeing the halo. There's been a lot of talk about halos in the images people post. Is it a monitor issue? What causes this?
Did you over sharpen the image to make the halo that people are commenting about? Or is this from the compression from converting to jpeg?
This is a re-sized shot for the web, and the halo was due to some sharpening I did before re-sizing it. The full-size (for printing) version doesn't have the halo. I gotta remember to sharpen after resizing!
Do you have a good feel for what shadows/highlights can do?
I saw Darrel Gulin use it to make water look much better and I have not been able to reproduce it. I was shooting right next to him and I tried to reproduce what he did and failed - so it has to ber the operator.
I'm thinking the less initial halo you have the less it would show after sizing (obviously). I always leave sharpening as my last step in the workflow anyway. I leave all my "archived" tiffs unsharpened.
As for the halo (which must look much worse on some screens than on mine), I'm 99.9% sure its from sharpening.
There are two stages of sharpening I do, the first of which "polishes" the image, and then the very last stage is the typical sharpening that is done to make up for the anti-aliasing filter in all DSLR's. I always carefully adjust the sharpening in the last stage to compensate for the size of the image. What works for a "full size" image doesn't work well for a much smaller photo (I'm sure we've all seen the ill effects of a photo that was resized after sharpening). In this particular image, I did the "polish" stage and then shrunk it down for the web, and then did the final sharpening afterwards. I just started using this "polish" stage, and am not fully versed with it, and am sure thats whats wrong here.
The good thing is that the print from my inkjet of the full-size image (my proof, not final print) does not exhibit the halo.
I also do like Chuck does, and file my edited shots without sharpening. I also keep the original unedited shots, just in case I have to go all the way back to the beginning and start over.
While it is possible that halos can be caused by shadow/highlight adjustments, that is not the case here.