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Posting an image here
Hi, sorry for this question but if I wanted to post an image to discuss in a forum here, what size should I make it ideally. It's a question on noise so I want a fair bit of detail in the image..

Thanks,Shane.http://web.mac.com/shane.metzke..

Comments (9)

The image has to be hosted external, such as on your own website, Zenfolio, etc. etc....

The you just put the url for the image in your msg:.

Http ://mydomain.com/sample.gif.

(but without the space after http).

Mez wrote:.

Hi, sorry for this question but if I wanted to post an image todiscuss in a forum here, what size should I make it ideally. It's aquestion on noise so I want a fair bit of detail in the image..

Thanks,Shane.http://web.mac.com/shane.metzke.

My current camera:http://www.amazon.com/exec/obidos/ASIN/B000V5P90K/02-4686-20Some of my pix:http://haroldandpod.com/p826419914/..

Comment #1

Mez wrote:.

Hi, sorry for this question but if I wanted to post an image todiscuss in a forum here, what size should I make it ideally. It's aquestion on noise so I want a fair bit of detail in the image..

To answer a question about noise it is usually essential to see the original unmodified image - but not all of it, that would be huge. Open the image in Photoshop (or whatever you have) and crop a small piece out of it *without changing the size*. Somewhere around 600-800 pixels wide, say, is probably about right. This is what people refer to as a "100% crop" - it doesn't mean 100% of the image, it means a crop of the image at 100% size:.

Image control:Zoom outZoom 100%Zoom inExpand AllOpen in new window.

Sometimes it's also useful to see the whole image reduced (downsampled) just to give some context to the crop..

Finally, if you can, and if relevant, provide a link to the full size image. You can do this very easily in dpreview by putting a semicolon (;) directly after the address of the JPEG - like this:http://www.accuset.co.uk/dpr/75-100-190mm-f8-crop.jpg - hit Quote to see what I've done to make that work. That one's not a full size image, it's a link to the same cropped image just to illustrate the technique...

Comment #2

Have photobucket , post multiple pics all the time.you have to belong/be part of a pic hosting site on the web..

I have IE7, so I simply have the photobucket web site up with my pics open on 1 web page, and the dpreview page I am replying to open on another page. write whatever you wish, go to photobucket(left click once on the pic's url link to make it blue, right click select copy), then on the reply page of dpreview position the blinking cursor where you wish, then right click and select paste, the copied url link will appear. if you want the link to the picture put a semicolon after the url, if you want the actual pic-no semicolon. hit enter, if pc, to move cursor to next line. for any additional pics simply repeat...

Comment #3

Thanks so much all, I have a deviantArt account so thought I'd just post the links, hope that's OK..

So, do you think I have a noisy 40D image here or am I just zoomed in too close?.

The shot is taken on a 40D at f6.3, 1/320, ISO 200 through a f470-200 lens. Completely untouched and shot raw..

Http://smetzke.deviantart.com/art/Noise-Test-Close-up-65578910.

Here is the context image..

Http://smetzke.deviantart.com/art/Context-for-noise-test-65578747.

And finally an in-between magnification..

Http://smetzke.deviantart.com/art/Noise-Test-1-65578529.

Thanks,Shane..

Http://web.mac.com/shane.metzke..

Comment #4

The pic does show some noise, but it was destined to do that under the conditions that it was shot. noise shows up in the dark/shadow areas first your pic is loaded with them. also, you should have checked you meter better and/or histogram because the pic is slightly underexposed. anytime you underexpose you introduce noise that didnot have to be there. more exposure would also help lighten up the shadow areas making any noise less visable..

But the basic problem is that there is, for a portrait, to much spread in the light amount between the lower face which is sunlight and the shadow areas. I would suggest the following- move to different location to equalize the light in all areas of the face, use a reflector to put some more light into the shadow areas(thus dimishing the light difference), or use fill flash. the latter can used by turning on the builtin flash on your camera...

Comment #5

Mez wrote:.

Thanks so much all, I have a deviantArt account so thought I'd justpost the links, hope that's OK..

So, do you think I have a noisy 40D image here or am I just zoomed intoo close?.

The shot is taken on a 40D at f6.3, 1/320, ISO 200 through a f470-200lens. Completely untouched and shot raw..

Http://smetzke.deviantart.com/art/Noise-Test-Close-up-65578910.

Here is the context image..

Http://smetzke.deviantart.com/art/Context-for-noise-test-65578747.

Yep, it's a little noisy in the shadows, but noise always shows more in dark areas. A slightly higher exposure would have been better. When you say "untouched" that is impossible of course, the RAW image has been converted to JPEG and some sort of settings applied, even if they were just the defaults..

Noise varies quite a bit depending on RAW converter settings, and even on which RAW converter you use...

Comment #6

GaryDeM wrote:.

... or use fill flash. the latter canused by turning on the builtin flash on your camera..

I leave mine permanently set to -2/3 FEC, for exactly this purpose...

Comment #7

One of our Oly Forum members set up this page explaining how it's done.....

Http://www.pbase.com/otfchallenge/picture_in_message.

Regards..

LucyU ZI owner!Olympus C30-20Zhttp://www.pbase.com/lucyFCAS Member #98, Oly Division'Photography is the art of seeing what others do not.'.

Image control:Zoom outZoom 100%Zoom inExpand AllOpen in new window..

Comment #8

Thanks all for the help on this - I was worried when I saw the close-up image of the eye posted above by Steve that I might have a few noise issues with the 40D but you have cleared this up for me. I should say also that a very light treatment with the noise reduction software did a great job with very little sacrfice in detail..

Shane.http://web.mac.com/shane.metzke..

Comment #9

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This question was taken from a support group/message board and re-posted here so others can learn from it.

 

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