Is this consider sharp?


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tc811

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May 20, 2005
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#1
Since i purchased the 40D, i've not really got time to try out. However, seeing so many ppl concern abt the LCD quality, i also start to worry. I've upload a file taken with 17-40. Can anyone tell me is this considered sharp? Thanks.

Please use this url to view the pics: http://www.pbase.com/tc811
 

Prismatic

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#2
LCD sharpness has nothing to do with the sharpness of photo taken.
Meaning, it does not affect the photo at all.
 

tc811

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#3
LCD sharpness has nothing to do with the sharpness of photo taken.
Meaning, it does not affect the photo at all.
I know, but somehow i just want to confirm my pic's sharpness. If this is not consider sharp, could it be caused by my hand shaking or camera problem.:dunno:
 

Rashkae

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Nov 28, 2005
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#4
What does LCD quality have to do with picture sharpness? NOTHING
 

Rashkae

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I know, but somehow i just want to confirm my pic's sharpness. If this is not consider sharp, could it be caused by my hand shaking or camera problem.:dunno:
Ok, you shot at 1/50s. Since you don't have a cam with built-in anti-shake and your lens is not an IS lens, my first guess would be motion blur. But once I saw the full-size image, it's not handshake at all. The detail on the ribbon is all still there, not sign of shake-blur.

The focal point seems to be on the bear's right eye (left side of the pic).

It's definitely sharp enough, but I think your lens is not at it's sharpest at f/4. You may want to try f/5.6 or f/8. Also, you shot on ISO1000, at which point the 40D starts to wash out details.
 

tc811

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Well, just to rectify again. Let's put the LCD issue aside, but i just really need to know on the quality of the pic. thanks.
 

tc811

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#7
The pic is too small to tell. Best to upload a full-size sample with full Exif data.
Problem is my file is 3mb plus, but just cannot upload to this forum.
 

Prismatic

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#9
The sharpness of the pic is okay, if you haven't specify the inbuilt sharpening of the camera.
However, note there may be some blurring due to the high ISO used and the moderately low shutter speed.
 

tc811

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#10
The sharpness of the pic is okay, if you haven't specify the inbuilt sharpening of the camera.
However, note there may be some blurring due to the high ISO used and the moderately low shutter speed.
I dunno why leh? But using the same AV setting in 350d and 40d, my feeling is that 40d is slower in response. Esp when using sigma 50-150 with f2.8 iso200, my 350d response is faster than the 40d. By the time i depress the button, the shutter close so slow that on 40d, it became a bit blur. I tried switching between the 2 lens, but seems same result. That's why was thinking is that camera fault?:dunno:
 

night86mare

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#11
HUH?!

are you kidding me, a more pro quality dslr has slower response than an entry level dslr?
in any case, shutter close slow or not has nothing to do with response, nor does it affect hand shake unless somehow in less than a second your reaction time to the shutter closing is godlike, literally

Canon Canon EOS 40D
1/50s f/4.0 at 28.0mm iso1000

iso 1000, f/4
please pardon me if i cannot tell if the photo is sharp, but it looks reasonably sharp at the focal point mentioned above
in fact, now i'm not quite sure if you know what you're talking about , because you seem to be asking every single question possible? :dunno:
and lcd, no way to tell if the picture is sharp, just reasonably sharp or not, needs to be put on computer to tell
 

Frijj

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May 1, 2006
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#12
I dunno why leh? But using the same AV setting in 350d and 40d, my feeling is that 40d is slower in response. Esp when using sigma 50-150 with f2.8 iso200, my 350d response is faster than the 40d. By the time i depress the button, the shutter close so slow that on 40d, it became a bit blur. I tried switching between the 2 lens, but seems same result. That's why was thinking is that camera fault?:dunno:
Are you sure the lighting conditions are the same (resulting in both having the same shutter speed)?

Let me help get that lemon off your hands. Just give me your address and I'll go pick it up from your place. I'll waive the disposal fee. :)
 

tc811

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May 20, 2005
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#13
Are you sure the lighting conditions are the same (resulting in both having the same shutter speed)?

Let me help get that lemon off your hands. Just give me your address and I'll go pick it up from your place. I'll waive the disposal fee. :)
Funny feeling thou, cos if i used both at same iso, same lighting, 350d with f2.8 shoot straight after depressed. 40d will take a while as thou using f10, maybe a 1 sec lapse. Maybe i'll bring it to CSC to check for me.
 

Hitz

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Mar 3, 2004
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#14
Since i purchased the 40D, i've not really got time to try out. However, seeing so many ppl concern abt the LCD quality, i also start to worry. I've upload a file taken with 17-40. Can anyone tell me is this considered sharp? Thanks.

Please use this url to view the pics: http://www.pbase.com/tc811
It looks fine, although not perfect.

First of all, due to a shallow depth of field some areas are out of focus. Secondly, since it was taken at 1/50 s, there is a chance of slight motion blur. Thirdly, 17-40 is not the sharpest at f/4. Fourthly, there is a chance of mirror shake at such shutter speeds. Lastly, noise reduction algorithms soften the image.

I would retake that picture using:

- A solid tripod and a cable release (that solves the motion blur problem)
- ISO 100 (eliminates softening due to noise reduction)
- f/8 (solves the DOF problem and reduces lens aberrations)
- that puts shutter speed in 1 s range (eliminates the effect of mirror shake as well).

Long exposures are fine for static objects. Teddy bear is not going to blink or move, you know.
 

tc811

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May 20, 2005
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#15
It looks fine, although not perfect.

First of all, due to a shallow depth of field some areas are out of focus. Secondly, since it was taken at 1/50 s, there is a chance of slight motion blur. Thirdly, 17-40 is not the sharpest at f/4. Fourthly, there is a chance of mirror shake at such shutter speeds. Lastly, noise reduction algorithms soften the image.

I would retake that picture using:

- A solid tripod and a cable release (that solves the motion blur problem)
- ISO 100 (eliminates softening due to noise reduction)
- f/8 (solves the DOF problem and reduces lens aberrations)
- that puts shutter speed in 1 s range (eliminates the effect of mirror shake as well).

Long exposures are fine for static objects. Teddy bear is not going to blink or move, you know.

I'll try your method again to determine the sharpness. Will post new pics again.:)
 

tc811

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May 20, 2005
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#16
I've re-shoot the pic using a tripod, setting at f11.0. Hope this is more convincing. But then, if only at f11 then only can we get clear and sharp pic, how to do it hand held? Do i have to pump up the iso? Thanks.:)
 

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