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What Am I Doing Wrong With My 7D?  
User currently offlineItay747 From Israel, joined Aug 2012, 41 posts, RR: 0
Posted (1 year 7 months 2 weeks 3 days 4 hours ago) and read 3628 times:

Hello,
I have recently bought the Canon 7D (feat. ef 70-200 2.8)
After I had uploaded the photos to my computer, I saw every photo with a plane in the middle and blue sky as the backgorund is 3-4 mega. So, after a bit of editing, the result was 250-350 kilobyte. Every photo is compressed and I don't know why. I save my images on the highest quality (12 on CS5) and on my 7D I shoot on the highest quality of JPEG.
All my photos are very compressed and a lot of details are missing.


Cheers,

Itay

13 replies: All unread, jump to last
 
User currently offlinedazbo5 From United Kingdom, joined Mar 2005, 2913 posts, RR: 2
Reply 1, posted (1 year 7 months 2 weeks 3 days 3 hours ago) and read 3604 times:

Itay,

As I commented on your other topic, I think you need to post an example so we can take a look and comment. It's difficult to give advice without knowing where you are going wrong.

Quoting Itay747 (Thread starter):
I have recently bought the Canon 7D (feat. ef 70-200 2.8)

That's a good camera and lens. However, you need to know how to use it and get the best from it. Expensive and good quality equipment is nice, but you need to understand the basics of photography too.

Quoting Itay747 (Thread starter):
I saw every photo with a plane in the middle and blue sky as the backgorund is 3-4 mega.

Does this mean you are heavily cropping the photos from an 18 mega pixel original to 3-4 mega pixels? That right there may be your problem.

Quoting Itay747 (Thread starter):
All my photos are very compressed and a lot of details are missing.

If you are heavily cropping them, there's no surprise this is what you're getting.

Darren



Equipment: 2x Canon EOS 50D; Sigma 10-20 EX DC HSM, 50-500 EX APO DG, Canon 24-105 f/4 L, Speedlite 430EX
User currently offlinejpmagero From United States of America, joined Apr 2012, 173 posts, RR: 0
Reply 2, posted (1 year 7 months 2 weeks 3 days 2 hours ago) and read 3587 times:

Quoting Itay747 (Thread starter):
I saw every photo with a plane in the middle and blue sky as the background is 3-4 mega

My experience is that jpeg photos at full resolution and moderate detail come out closer to 6-7 MBs. Are you using the "Large/Fine" setting? Seems like it might be "Medium" instead.



John M - Aussie expat in the US
User currently offlineItay747 From Israel, joined Aug 2012, 41 posts, RR: 0
Reply 3, posted (1 year 7 months 2 weeks 3 days 1 hour ago) and read 3572 times:

Quoting dazbo5 (Reply 1):
That's a good camera and lens. However, you need to know how to use it and get the best from it. Expensive and good quality equipment is nice, but you need to understand the basics of photography too.

I do know how put settings on my equipment. I have been photographing for 3 years now.

Quoting dazbo5 (Reply 1):
Does this mean you are heavily cropping the photos from an 18 mega pixel original to 3-4 mega pixels? That right there may be your problem.

I don't crop the photo, the original file is 3-4 mega. For example, a photo I took of a ramp where there are a lot of details like the plane in the gate and the runways, was 7 mega. If there is a plane and sky only it's 3-4 mega max.
I can't upload photos since I am not a premium member and not First.
I shoot on the highest Jpeg quality (L 18Megapixales).
Also, I put on daylight the center-weighted average Metering mode with 9 middle AF points. Is that ok? Could it affect the Jpeg comression problem?

Itay


User currently offlinedlowwa From Canada, joined Apr 2005, 7328 posts, RR: 30
Reply 4, posted (1 year 7 months 2 weeks 3 days ago) and read 3554 times:

Quoting Itay747 (Reply 3):
I can't upload photos since I am not a premium member and not First.

You don't need to be a premium member to post photos, only to have them hosted by a.net. You can use an external hosting site, or just post the images directly.

I don't see any rejections for compression in the log, though quite a few for contrast. Some examples for everyone to see:

http://www.airliners.net/addphotos/rejections/big/20130201_w1359034185.2601britisha321paning.jpg

http://www.airliners.net/addphotos/rejections/big/20130206_k1359469104.931424copy.jpg

It looks to me that the problem may be poor editing combined with poor shooting conditions. The camera settings don't look to be a major issue unless you are doing something like shooting with the aperture stopped down significantly.


User currently offlinemjgbtv From United States of America, joined Jan 2008, 858 posts, RR: 0
Reply 5, posted (1 year 7 months 2 weeks 3 days ago) and read 3552 times:

Quoting Itay747 (Reply 3):
I don't crop the photo, the original file is 3-4 mega

What aspect ratio is your camera set to?

Marty


User currently offlinedazbo5 From United Kingdom, joined Mar 2005, 2913 posts, RR: 2
Reply 6, posted (1 year 7 months 2 weeks 3 days ago) and read 3544 times:

Quoting Itay747 (Reply 3):
the plane in the gate and the runways, was 7 mega. If there is a plane and sky only it's 3-4 mega max.

I see what you mean now, you mean the file size? The size of the file depends on the details in the photo. A file where there is little in the background will compress easier than one with detail like a ramp shot. The shot with less detail will therefore be a smaller file than one with lots of details, it's normal when shooting in jpeg and doesn't really make a lot of difference as long as you're using the full resolution and highest quality setting, ie least compression.

Looking at the photos that Dana kindly posted for you, the basics seem to be there, you just need to develop your workflow for submitting them for here. Have you read the editing guide for the site? That'll point you in the right direction as the ones above lack contrast but aren't too bad otherwise.

Quoting Itay747 (Reply 3):
Also, I put on daylight the center-weighted average Metering mode with 9 middle AF points

Everone is different, but i'd use evaluative metering and not centre-weighted as aircraft aren't the easiest subject to get an accurate reading for with centre-weighting and will often give underexpose depending on the lighting on the aircraft. I would also use centre spot focussing rather than all 9 so you can choose where your focal point is and not the camera. This will help even out the depth of field across the frame and aircraft as the camera will often choose the closest part of the aircraft often resulting in the aft being out of focus. It's what works for you though.

Darren



Equipment: 2x Canon EOS 50D; Sigma 10-20 EX DC HSM, 50-500 EX APO DG, Canon 24-105 f/4 L, Speedlite 430EX
User currently offlineerikgrinsvall From Sweden, joined Jul 2008, 25 posts, RR: 0
Reply 7, posted (1 year 7 months 2 weeks 2 days 23 hours ago) and read 3527 times:

I sort of had the same problem, but then i just changed from AF SERVO to AF FOCUS (if you use AF) and it changed like night and day. However, on a 50D that is.

Like Dana said, the conditions don't look too promising.


User currently onlinevikkyvik From United States of America, joined Jul 2003, 10047 posts, RR: 26
Reply 8, posted (1 year 7 months 2 weeks 2 days 22 hours ago) and read 3522 times:
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Quoting erikgrinsvall (Reply 7):
I sort of had the same problem, but then i just changed from AF SERVO to AF FOCUS (if you use AF) and it changed like night and day. However, on a 50D that is

Changing AF mode shouldn't have anything to do with a file being more or less compressed....



"Two and a Half Men" was filmed in front of a live ostrich.
User currently onlineSilver1SWA From United States of America, joined Mar 2004, 4820 posts, RR: 26
Reply 9, posted (1 year 7 months 2 weeks 2 days 22 hours ago) and read 3520 times:
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Quoting Itay747 (Reply 3):
I shoot on the highest Jpeg quality (L 18Megapixales).

Make sure you have Large Fine set. That is the highest quality.

Just making sure.



ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.
User currently offlineckw From UK - England, joined Aug 2010, 743 posts, RR: 16
Reply 10, posted (1 year 7 months 2 weeks 2 days 16 hours ago) and read 3462 times:

The numbers for the output files sound reasonable (7mb with detail background 3-4 for blue sky) so I don't think the problem is with the camera or its settings.

The problem must be in your post processing - a 3/4 mb file becomes 350K

Exactly how do you process the file? (step by step please), esp. how you save, as there is more than one method in PS.

Unless ... is it possible you are saving both a large RAW and a small jpg (possible with the 7D) and somehow picking working on the jpg?

Cheers,



Colin K. Work, Pixstel
User currently offlineItay747 From Israel, joined Aug 2012, 41 posts, RR: 0
Reply 11, posted (1 year 7 months 2 weeks 21 hours ago) and read 3334 times:

Quoting mjgbtv (Reply 5):
What aspect ratio is your camera set to?

3:2. That's how I crop and take photos.

Quoting dazbo5 (Reply 6):
Looking at the photos that Dana kindly posted for you, the basics seem to be there, you just need to develop your workflow for submitting them for here. Have you read the editing guide for the site? That'll point you in the right direction as the ones above lack contrast but aren't too bad otherwise.

I have seen A.net suggestion for editing, not bad but for contrast for instance I use the "Brightnes/Contrast" tool.
I may have a problem in choosing the ratio of contrast~brighness.

Quoting dazbo5 (Reply 6):
Everone is different, but i'd use evaluative metering and not centre-weighted as aircraft aren't the easiest subject to get an accurate reading for with centre-weighting and will often give underexpose depending on the lighting on the aircraft. I would also use centre spot focussing rather than all 9 so you can choose where your focal point is and not the camera. This will help even out the depth of field across the frame and aircraft as the camera will often choose the closest part of the aircraft often resulting in the aft being out of focus. It's what works for you though.

You mean to choose Manual select.:Single point AF with the middle point?

Quoting ckw (Reply 10):
Exactly how do you process the file? (step by step please), esp. how you save, as there is more than one method in PS.

Crop, Brightness~Contrast (usually a bit more brightness than contrast), levels (if nedded), Equalize (for checking dust points), then noise reduce (I used to use a patch for PS called "Noise Ninja" that reduces massivly the noise but also makes it abit soft and compressed. I have started using the PS noise reduction. On the noise reduction I put the following parameters: -Preview- check
- Basic and not advanced
- Settings- default
-Strength- mainly 5%, but 6% if there is a massive noise)
-Preserve Details- 60%
-Reduce color noise- 45%
-Sharpen details- 30%
-Remoce Jpeg artifect - not checked
Image size - 1024X683/1200/800:
Scale styles - checked
Constrain proprotions - checked
Resmaple image - checked
Bicubic(best for smooth gradientes)
Sharpenning if needed (I use the smart sharpen tool)
Saving by left left shift+leftCtrl+S (save as a copy on Jpeg format, ICC profile checked, use lower case extension. Done.


User currently offlineckw From UK - England, joined Aug 2010, 743 posts, RR: 16
Reply 12, posted (1 year 7 months 2 weeks 19 hours ago) and read 3312 times:

I'm afraid I'm stumped. I've followed your steps as closely as possible and even at 1024 px, I still end up with images of around 1mb. However, mine is a different version of Noise Ninja, so I can't set the options exactly as you have.

All I can suggest is take a test image and then after each step (including before any editing) resize and save it. This should tell you exactly what step in the process is introducing the compression.

Cheers,

Colin



Colin K. Work, Pixstel
User currently offlineeskillawl From Sweden, joined Jan 2012, 96 posts, RR: 0
Reply 13, posted (1 year 7 months 2 weeks ago) and read 3225 times:

Quoting ckw (Reply 12):
I have seen A.net suggestion for editing, not bad but for contrast for instance I use the "Brightnes/Contrast" tool.

Itay, try to use the auto contrast tool. I know alot of auto-tools is really bad, but the contrast is great and I dont get contrast rejections very often when using it.

Cheers Eskil.



Photo equipment: Canon EOS 60D | Canon 70-200 F4L USM | Canon 18-55 3:5-5:6 |
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