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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 23 Jul 2011 (Saturday) 18:46
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Is there something wrong with my 7D? My lens? Me?!

 
germ79
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Jul 23, 2011 18:46 |  #1

Just got my 7D. I've read about focusing woes and how to setup focusing.

I was taking some practice shots, for fun, of my kids' pet rats today. I was using the 17-55 2.8. Many of the pictures were not focused on the spot I remembered focusing on. I was using single point and then switched to the zone style.

So, I pulled them up in DPP to check out exactly where the auto-focus point was. Something isn't right. What's going on?

THIS picture was taken at 35mm 1/100th at f/5 ISO 320:

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
Content warning: data



THIS one was 21mm 1/100th at f/5 ISO 100:
IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
Content warning: data


So, what do you think? Am I doing something wrong?

Thanks!
Jeremy

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Jul 23, 2011 18:49 |  #2

I'm no expert. But it looks like the lens or camera is front focusing.



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MikeJohn
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Jul 23, 2011 18:57 |  #3

Shutter speed is too slow for the rat.


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Jul 23, 2011 19:01 |  #4

MikeJohn wrote in post #12810859 (external link)
Shutter speed is too slow for the rat.

Mike brings up a good point. What was your AF mode, in these shots?



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germ79
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Jul 23, 2011 19:10 |  #5

Str0ntium wrote in post #12810877 (external link)
Mike brings up a good point. What was your AF mode, in these shots?

It was in One-Shot mode. In the pic of the rat standing up, he was pretty much still. Would that matter?


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Jul 23, 2011 19:19 |  #6

germ79 wrote in post #12810894 (external link)
It was in One-Shot mode. In the pic of the rat standing up, he was pretty much still. Would that matter?

Yes. For live subjects, it matters quite a bit. Especially ones like children and animals whom you cannot direct to 'stay still'.

Try AI Servo, next time. I think your results will be much better.



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Bill ­ Boehme
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Jul 23, 2011 19:42 |  #7

germ79 wrote in post #12810838 (external link)
..... Something isn't right. What's going on?

............

So, what do you think? Am I doing something wrong?

Thanks!
Jeremy

The rat is a fink! He moved despite what he might have told you. Take a look at this 500% enlargement of his ear.


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Looks like he was shaking his head rather violently when the shutter fired.

Other than that, a bit of sharpening wouldn't hurt, either.

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Jul 23, 2011 19:53 |  #8

Bill Boehme wrote in post #12810989 (external link)
The rat is a fink! He moved despite what he might have told you. Take a look at this 500% enlargement of his ear.

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Hosted photo: posted by Bill Boehme in
./showthread.php?p=128​10989&i=i69163585
forum: Canon EOS Digital Cameras


Looks like he was shaking his head rather violently when the shutter fired.

Other than that, a bit of sharpening wouldn't hurt, either.

Lol. Nice, clean, explanation. Love this forum.



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germ79
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Jul 23, 2011 20:04 |  #9

I just did some test shots with some Lego guys. 2 bodies and 2 lenses.

7D on One Shot AF with single center point (small) focus area.
30D on center point AF.

The files are each about 3mb and you can view them here:
https://public.me.com/​germ79 (external link)

All the data is on the screenshot. If anyone has any suggestions, I'd greatly appreciate it.

Jeremy


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Jul 23, 2011 20:07 |  #10

germ79 wrote in post #12811055 (external link)
I just did some test shots with some Lego guys. 2 bodies and 2 lenses.

7D on One Shot AF with single center point (small) focus area.
30D on center point AF.

The files are each about 3mb and you can view them here:
https://public.me.com/​germ79 (external link)

All the data is on the screenshot. If anyone has any suggestions, I'd greatly appreciate it.

Jeremy

You should post the shots here, not many folks are going to download your file. Who knows what could be in there?


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Jul 23, 2011 20:08 |  #11

germ79 wrote in post #12811055 (external link)
I just did some test shots with some Lego guys. 2 bodies and 2 lenses.

7D on One Shot AF with single center point (small) focus area.
30D on center point AF.

The files are each about 3mb and you can view them here:
https://public.me.com/​germ79 (external link)

All the data is on the screenshot. If anyone has any suggestions, I'd greatly appreciate it.

Jeremy

To be quite frank, we need photos taken in the exact same scenario as last time yet with AI servo AF mode...

Shooting still life does not address your original post....



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Jul 23, 2011 20:15 |  #12

germ79 wrote in post #12810894 (external link)
It was in One-Shot mode. In the pic of the rat standing up, he was pretty much still. Would that matter?

did you take the shot as soon as it focused?
if you're in 1-shot mode, and acquire focus, you have to take the shot or release focus and pick it up again... if you gain focus and wait to take the shot and you or subject moves, the result will probably be no good....
I see this mistake often... the shooter gets focus, waits for better framing or subject position, and then wonders why the focus is off...


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Jul 23, 2011 20:18 |  #13

But, to get to the point:

germ79 wrote in post #12810838 (external link)
Something isn't right. What's going on?

It seems like you need to do like I'm doing. Read, read, and read. Keep learning. I know you're not asking about your lens or hardware. But, it's apparent you need to read more. I do too. For the situation that you posted, you needed a different type of AF.

Once you get that down, still life is easy...



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Jul 23, 2011 20:19 |  #14

SMP_Homer wrote in post #12811097 (external link)
did you take the shot as soon as it focused?
if you're in 1-shot mode, and acquire focus, you have to take the shot or release focus and pick it up again... if you gain focus and wait to take the shot and you or subject moves, the result will probably be no good....
I see this mistake often... the shooter gets focus, waits for better framing or subject position, and then wonders why the focus is off...

Anyone that doesn't refocus, right before the shot, needs to be shot ;)



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Jul 23, 2011 20:24 |  #15

germ79 wrote in post #12810838 (external link)
Just got my 7D. I've read about focusing woes and how to setup focusing.

I was taking some practice shots, for fun, of my kids' pet rats today. I was using the 17-55 2.8. Many of the pictures were not focused on the spot I remembered focusing on. I was using single point and then switched to the zone style.

So, I pulled them up in DPP to check out exactly where the auto-focus point was. Something isn't right. What's going on?

THIS picture was taken at 35mm 1/100th at f/5 ISO 320:
IMAGE NOT FOUND
HTTP response: NOT FOUND | Content warning: data



THIS one was 21mm 1/100th at f/5 ISO 100:
IMAGE NOT FOUND
HTTP response: NOT FOUND | Content warning: data


So, what do you think? Am I doing something wrong?

Thanks!
Jeremy


Tv 1/100 at 35mm should be plenty fast to capture the rat... It tooks like to me that you focused on the rat's body but he moved before you completed the press of the shutter...

the 2nd shotlooks okay to me on my little laptop monitor as he was clearly moving towards you...

i'd suggest testing of stationary objects first, so if you're getting blurry pictures after confirming you have no focusing issues with the combination, then you can safely attribute the blurry pics to user style


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