I think I may have found the root cause of my 7D misfocusing problem!
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hobbit6003
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Both are just as good, but feature wise, I think that the 7D is just ahead. Nikon D300/300s is also one of the best in its class!
I've considered the 5D MKII, and even more so when the 1st 7D was giving me focusing headaches. But when I can capture an image like the one below, I instantly knew that crop bodies are for me.
hah yeah but i have a set limit on how much I can spend for my camera equipment.
A 7D with F2.8 zoom lenses (11-16 2.8, 17-55 2.8 IS, 70-200mm 2.8 IS) will give me the same low light capabilities as a 5d2 with F4 zooms (17-40L F4, 24-105 F4 IS, 70-200m f4IS)
Both setups would cost the same but the 7D's more advanced features, as well as 2.8 aperture's better AF performance) will make it perform better. Btw,im just talking about what is available now. There will always be something better in the future. No doubt, 5d Mk3 will inherit all of 7Ds nice features (but may exclude the super fast FPS coz then you would call it a 1Ds Mk IV :lol: )
Of course , if Canon does decide to release the 24-70 2.8 IS very early next year, I'm stickin with the 5d2
forget about the budget. better than not being able to sleep at night thinking about it .:lol:
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Hi guys,just found out my 7D has the back focusing problem too!!!
So the conclusion now is it fixable or is it a factory default...test it on 2 lenses..
70-200 ok,no prob...but on 50 1.4 it has a back focus...adjusted on micro adjustment and some times all the way to 20 max....the thing is on the shots some are back focus and some shots are ok if i dont do the adjustments...tested on tripod and on field...
Never had to adjust my micro adjustments at all on my previous 40 & 50D
Of course sending it in but reading around like theres not a real solution to it...
Mine are the earlier batch,starts with 023xxxxxxx...
Getting depressed now..hehehe
So the conclusion now is it fixable or is it a factory default...test it on 2 lenses..
70-200 ok,no prob...but on 50 1.4 it has a back focus...adjusted on micro adjustment and some times all the way to 20 max....the thing is on the shots some are back focus and some shots are ok if i dont do the adjustments...tested on tripod and on field...
Never had to adjust my micro adjustments at all on my previous 40 & 50D
Of course sending it in but reading around like theres not a real solution to it...
Mine are the earlier batch,starts with 023xxxxxxx...
Getting depressed now..hehehe
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Now that DXOMark supports the 7D, you can compare it against the 50D and 500D by following this link.
At low ISO, the 50D/500D beats the 7D at the pixel level in terms of SNR 18%, Tonal Range and Color Sensitivity. And they are about equal at high ISO. Fascinating.
Looks like the inconsistent AF monster strikes again.
The service center can fix the issue for the center AF point, but it may still be there for all the other AF points. Due to time constraints (and maybe laziness), they won't fix the peripheral AF points for you unless you can pinpoint which ones are faulty. If you plan to use only the center AF point on the 7D, you'll be fine. Personally, I bought the 7D precisely because of the peripheral AF points, so it is a rather sad experience for me. :cry:
The DXOMark results make me wonder if it would have been better off for me to get the 50D instead... :think: On the other hand, the 7D has the best handling among ALL Canon APS-C cameras today.
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Oh no1 That cant be true! I "upgraded" from my mint 50d to 7d hor!
Now that DXOMark supports the 7D, you can compare it against the 50D and 500D by following this link.
At low ISO, the 50D/500D beats the 7D at the pixel level in terms of SNR 18%, Tonal Range and Color Sensitivity. And they are about equal at high ISO. Fascinating.
Looks like the inconsistent AF monster strikes again.
The service center can fix the issue for the center AF point, but it may still be there for all the other AF points. Due to time constraints (and maybe laziness), they won't fix the peripheral AF points for you unless you can pinpoint which ones are faulty. If you plan to use only the center AF point on the 7D, you'll be fine. Personally, I bought the 7D precisely because of the peripheral AF points, so it is a rather sad experience for me. :cry:
The DXOMark results make me wonder if it would have been better off for me to get the 50D instead... :think: On the other hand, the 7D has the best handling among ALL Canon APS-C cameras today.
Sailor73
Member
The way I see it..... the differences is so negligible. I think in the SNR specs, the biggest diff. is 3db ?!! Think positive... 7D gives you some functionality which you can't find in 50D
Not that I am in a state of denial but instead of chasing technical specs, I rather be contented with what I have and try to make the best "wow" photos out of it
Not that I am in a state of denial but instead of chasing technical specs, I rather be contented with what I have and try to make the best "wow" photos out of it
At low ISO, the 50D/500D beats the 7D at the pixel level in terms of SNR 18%, Tonal Range and Color Sensitivity. And they are about equal at high ISO. Fascinating.
The DXOMark results make me wonder if it would have been better off for me to get the 50D instead... :think: On the other hand, the 7D has the best handling among ALL Canon APS-C cameras today.
The way I see it..... the differences is so negligible. I think in the SNR specs, the biggest diff. is 3db ?!! Think positive... 7D gives you some functionality which you can't find in 50D
Not that I am in a state of denial but instead of chasing technical specs, I rather be contented with what I have and try to make the best "wow" photos out of it
yeah. People shud not expect the 7d to have higher image quality than a 50d. Its more expensive because its weatherproof, has tons of features,best video capability in a dslr. They are worth the premium! The fact that it can maintain same IQ despite having more megapixels is an achievement! More megapixels more cropping power.
Now if only the the 7d af points were not defective...
My 70-200 mm f4 is now so much better on the 5d2. 100 % crops of subjects taken far away are sharp. They look badly smudged on the 7d that i had. My bro who has a 50d and 70-200 f4 was shocked when he saw pics. He sent me pics from an MMA event. Crops of fighters with bruised and bloody faces.tack sharp. That was the final straw for me. Lol.
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hobbit6003
Senior Member
Without a doubt the 7D has features unsurpassed by the current crop of dslr. A 7D with good AF is simply a joy to use. The smudgy looking 100% crop images actually don't indicate defect, but it is how they seem to be rendered with this camera, and it really takes some getting use to though.
Sailor73
Member
Think this was discussed before but just in case, this is the quote from Canon Professional Network http://cpn.canon-europe.com/content/infobank/capturing_the_image/pixels_and_image_size.do .... some salient points:-
QUOTE "Digital cameras do not take sharp images .....It is caused by the interpolation of colour data..... as the colour data is increased, so the sharpness suffers.....
Most digital cameras aimed at the consumer market do the sharpening in camera.....The situation is different with professional cameras & it is necessary to keep image processing within the camera to a minimum.....The images from your camera will look a little soft when you first see them on a computer monitor.....
...smoother gradation, which can give the impression of reduced sharpness....
...images from more recent EOS professional digital cameras can still look softer than those from earlier models.....recent models have more pixels, which means that pixel size is smaller & smaller pixels are more sensitive to camera shake, as a smaller movement will cause the image to move across more pixels..... You need to hold the camera steadier ....re-think their shutter speeds, as blur from subject movement will be more apparent on cameras with more pixels...." UNQUOTE
QUOTE "Digital cameras do not take sharp images .....It is caused by the interpolation of colour data..... as the colour data is increased, so the sharpness suffers.....
Most digital cameras aimed at the consumer market do the sharpening in camera.....The situation is different with professional cameras & it is necessary to keep image processing within the camera to a minimum.....The images from your camera will look a little soft when you first see them on a computer monitor.....
...smoother gradation, which can give the impression of reduced sharpness....
...images from more recent EOS professional digital cameras can still look softer than those from earlier models.....recent models have more pixels, which means that pixel size is smaller & smaller pixels are more sensitive to camera shake, as a smaller movement will cause the image to move across more pixels..... You need to hold the camera steadier ....re-think their shutter speeds, as blur from subject movement will be more apparent on cameras with more pixels...." UNQUOTE
I just compared my 12 MP XSi vs 18 MP 7D, using the same test procedure as Darwin Wiggett. Tripod mount, manual focus under live view, low ISO, aperture size ranging from f/2.8 to f/16 etc etc. Then, to level the playing field, I uprez my XSi images to 18 MP.
There's no denying: the XSi images are sharper all the way from f/4 onwards. So, Darwin is actually correct! It's quite a surprise really. Ooops... I seem to run into one surprise after another recently with regards to the 7D... and they are all negative! This doesn't sound too good, does it?... :think:
Darn it, I am now so used to the gazillion features on 7D (lots of customizable buttons, on-demand grid lines etc etc), I am not sure if I can ever let it go... :bsmilie:
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Sounds like is another way of saying that they've put too many megapixels on for the crop sensor making it more delicate and difficult to use. You need higher shutter speeds than what you would normally need to get nice shots ;p
This may be true. But it doesn't explain a lot of the findings that there are issues with the peripheral AF points.
The features of the 7D are amazing though. Which is why i could not get it off my head even if i have the 5d2 now. I want that AUTO ISO in Manual mode!!!!
Out of the 18 peripheral AF points, 4 are not too stable with my 17-55 f/2.8 and 70-200 f/4 IS lenses. But all the AF points work well with my 100 f/2.8 macro lens.
hobbit6003
Senior Member
Haha, Im beginning to live with the image rendition of 7D. IMO, it is a small trade off compared to the wonderful features it comes with, which can be a big help with the images I want to capture.
The IQ is not all that bad, in fact the Images are still pretty sharp, just that it looks 'different'
I too realise i have this issue too. Mine was the lastest batch. But i conclude that its not really a manufacturing issue with canon.
I found this problem in such condition. Bear in mind that im using tripod & constant F8
1) Shoot in low light
2) Zoom in to more then 60mm, Subject is in 1.5~1.6m (Using 15-85mm)
3) Was shooting at the subject's face (Smooth tone background)
4) Using Single point AF
But everything is ok when i change from
1) Single Pt AF to Spot AF
2) Tried switching back to Single Pt AF but zoom out to less then 60mm
With such i conclude that this model has no problem. I remember i read it from somewhere that the focus will not be accurate if the subject is with same tone thoughout.
Correct me if im wrong... hope it helps.
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Did you try to manual focus under 10x magnification live view?
Did you try to borrow some tried and tested high quality lenses? Both Sigma 30 f/1.5 and 17-55 f/2.8 IS suffer from poor QC. If you own bad copies... good luck. :bsmilie: For the Sigma lens, you can request to have it sent to Japan for servicing. It works. You can also get the Canon lens serviced at CSC... but you must first convince them there's a problem with your lens. Now, that's the hard part 'cos they'll do their utter best to convince you otherwise. :bsmilie:
PS: Did you try a simple brick wall test to see if you have decentered elements in your lenses?
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hobbit6003
Senior Member
I dun think @ 100% , it is soft . The thing is, for 7D, the images are rendered abit differently, and thus may have been misconstrued as being soft by many. Why dun you post a pic with the exif data and we'll see.
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