canyonblue17
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Why Am I Getting Grainy Photos?

Thu Dec 20, 2012 3:51 am

Hey there everyone. I am trying to figure out why I am getting so many grainy photos recently.

Basic setup: Canon T2i + Canon 70-200mm f4.0 L. Wonderful lighting....mid to late afternoon/early evening on almost to perfectly clear days. Cool weather (no haze). Taking landing photos at close range. Setting my ISO at 100. Taking as close to full frame photos as possible. Saving photos at between 1085 and 1200 pix using the highest quality compression.

Results.....numerous grainy and compression related rejections. Two examples posted below. You guys and gals are the best....what can I change (camera settings, photo taking, editing processes) to improve my work? Two examples below.

United at Dulles
Allegiant in LAS
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canyonblue17
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RE: Why Am I Getting Grainy Photos?

Thu Dec 20, 2012 3:55 am

If this needs to be moved to the Photography Feedback forum....my mistake, just let me know....or move it. Thanks....Canyonblue17
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aussie18
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RE: Why Am I Getting Grainy Photos?

Thu Dec 20, 2012 4:26 am

Hi,

The Allegiant is very soft and has large amount of compression visible in top part of sky,seems quite blotchy.

The United isnt too bad but small amount of grain visible.

Are you sharpening the whole image or just around the aircraft,If you sharpen the sky and apply large amounts of sharpening depending on how soft it is it will make the sky grainy.When I apply sharpen I only sharpen the aircraft,Also if I have visible grain I use lasso tool and select the sky and apply small amount of noise reduction.

Also do you need to brighten the shots quite a lot,Seems your set up is okay and just make sure you always save at highest resolution.

Another idea is trying uploading images at our minimum size requirements of 1000x679.

Cheers Mark
 
canyonblue17
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RE: Why Am I Getting Grainy Photos?

Thu Dec 20, 2012 4:34 am

Quoting aussie18 (Reply 2):
Are you sharpening the whole image or just around the aircraft

Both of these photos required almost no sharpening at all.

Quoting aussie18 (Reply 2):
Also do you need to brighten the shots quite a lot

I used a very limited amount of brightening. Both were taken mid to late afternoon on days with absolutely no cloud cover.

Quoting aussie18 (Reply 2):
has large amount of compression visible in top part of sky

I have never received a compression rejection until recently, even though I have used the exact same "saving" format for almost every picture.....(several hundred over the past 2 years). I will try saving at the 1000x679 range, but I fear more will need to be done.
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dazbo5
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RE: Why Am I Getting Grainy Photos?

Thu Dec 20, 2012 8:56 am

Maybe you can share the original frame(s) with us so we can take a look at where things might be going wrong? I'm more than happy to take a look at them if you'd rather email them than post them here (contact me through my profile), The UA 738 looks pretty clean on my screen and is a harsh rejection for noise in my opinion, although there is a small amount just about visible. The quality of the Allegiant isn't great, how much was that cropped? Are you using any shadow / highlight tool to lift the darker areas? That's a prime reason fort he introduction of noise and shouldn't be used.

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vikkyvik
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RE: Why Am I Getting Grainy Photos?

Thu Dec 20, 2012 3:39 pm

Quoting canyonblue17 (Reply 3):
Both of these photos required almost no sharpening at all.

They both look soft to me. The Allegiant almost looks slightly out-of-focus.

The vast majority of photos uploaded here will require some sharpening. Even when I was using a Rebel XS + 70-200 F4L, which was a ridiculously sharp combination at full res, they'd still need some sharpening after resizing.

Quoting canyonblue17 (Reply 3):
I used a very limited amount of brightening. Both were taken mid to late afternoon on days with absolutely no cloud cover.

You can have the brightest day in the world, but if your settings aren't right, you still may need to brighten the photos. I've never had much success uploading photos I've had to brighten significantly (say, a stop or more), because they're much noisier.

Questions:

Are you shooting RAW, or at full-resolution/lowest-compression JPEG? Make sure the in-camera options are correct first.

How are you resizing? Bicubic sharper? Bicubic normal? I'm assuming you're using Photoshop.

Are you using any noise reduction? If shooting JPEG, is in-camera noise reduction on?
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Joshu
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RE: Why Am I Getting Grainy Photos?

Thu Dec 20, 2012 11:48 pm

Quoting vikkyvik (Reply 5):
Are you shooting RAW, or at full-resolution/lowest-compression JPEG? Make sure the in-camera options are correct first.

This was my first thought.
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