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Occasional Contributor
Posts: 18
Registered: ‎03-17-2015
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shutter speed verses sharpness: Canon 6d @300mm no IS.

I recently sent my camera back to Canon for recalibration after I noticed all of my telephoto shots seems to be fuzzy after cropping. The results came back and they basically found nothing wrong with the camera or lens..

 

My question is based on the results below is there a shutter speed for taking telephoto shots where the sharpness falls off due to internal vibration of some sort?

 

I am also at a loss as to why mirror lockup ,(with MF) would not be the same as a shot using live view with AF.

Is there shutter movement that occurs during mirror lockup using eyeview that does not occur using LiveView AF?

 

(I have not performed this test at higher shutter speeds due to internal lighting issues)

 

I performed these tests using the following fixed points:

RAW mode

focal length 300

Fstop 5.6

ISO 200

Shutter speed 1/60

No IS enabled

Camera mounted.

All shots were taken with 10 second shutter delay

Calibration target area is dead center of focus area.

 

Here are the tests I performed:

1.LiveView AF mode: sharp as a tack consistently

2.LiveView Quickmode: slightly less sharp but still extremely good

3.EyeView Miror Lockup,(switched to MF after allowing LiveView AF mode to find focus)

4.EyeView No MirrorLock,(switched to MF after allowing LiveView AF mode to find focus)

 

1.LiveView AF mode1CALIBRATE! new LENS TEST LV AF..PNG

 

 

2.LiveView Quickmode

2cALIBRATE! new LENS TEST  LV QF;.PNG

 

 

3. Eyeview Mirror lockup

3CALIBRATE! new LENS TEST EV ML;.PNG

 

4.Eyeview NO Mirror lock

 

4CALIBRATE! new LENS TEST EV NO ML;.PNG

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Respected Contributor
Posts: 1,971
Registered: ‎02-26-2015

Re: shutter speed verses sharpness: Canon 6d @300mm no IS.

Honestly you need to stop shooting focus targets, and go out and start shooting real things.

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Honored Contributor
Posts: 5,558
Registered: ‎06-25-2014

Re: shutter speed verses sharpness: Canon 6d @300mm no IS.

1/60 second is usually too slow with a 300mm lens. Even with IS, which the Exif data say you're not using, it would be problematical.

Bob
Philadelphia, Pennsylvania USA
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Occasional Contributor
Posts: 18
Registered: ‎03-17-2015

Re: shutter speed verses sharpness: Canon 6d @300mm no IS.

Getting the best pictures requires more than just going out and shooting real things. it also requires a complete understanding of the capabilities of the camera you are using in order to get the most out of it.
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Occasional Contributor
Posts: 18
Registered: ‎03-17-2015

Re: shutter speed verses sharpness: Canon 6d @300mm no IS.

Thank you Rob, so regardless of the type of Tripod or stability of the camera does the rule of focal length inverse to shutter speed apply? ( 300mm would 1/300 sec?) I thought was only for hand held shots?
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Respected Contributor
Posts: 1,971
Registered: ‎02-26-2015

Re: shutter speed verses sharpness: Canon 6d @300mm no IS.


@dsullens wrote:
Getting the best pictures requires more than just going out and shooting real things. it also requires a complete understanding of the capabilities of the camera you are using in order to get the most out of it.

And the best way to learn that is by shooting real 3 dimemnsional things.

 

This is the second thread you've started with photos of 2 dimensional targets.

 

The difference you are seeing between liveview and other photos is caused by one of two things. Either the micro focus adjustement is not correct. You wont know that unless you shoot 3 dimensional objects so you can see where the focus actually is. Or, vibration caused by mirror movement. 

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Esteemed Contributor
Posts: 2,373
Registered: ‎11-14-2012

Re: shutter speed verses sharpness: Canon 6d @300mm no IS.

I'm confused. Does it get sharp photos when using JUST AF? Why are you using MF? Maybe it's your eye & the lack of an old fashoned focal aid such as a split prism.

Also just how stable is your tripod? When I'm doing serious testing I mount to something solid, not a tripod. Here's an example.

 

IMG_0792.JPG

"A skill is developed through constant practice with a passion to improve, not bought."
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Esteemed Contributor
Posts: 2,373
Registered: ‎11-14-2012

Re: shutter speed verses sharpness: Canon 6d @300mm no IS.

One more question. Which 300 mm lens are you using?

"A skill is developed through constant practice with a passion to improve, not bought."
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Occasional Contributor
Posts: 18
Registered: ‎03-17-2015

Re: shutter speed verses sharpness: Canon 6d @300mm no IS.

I have found the focus is much more accurate,(but a lot slower) when using LiveView AF focus verses using one of the 11 points with AF with eye view. So my process is as follows: Set to LiveView Mode obtain focus(green box) switch Lens to MF then change to to EyeView mode and take exposure. Lens is EF 70-300mm F4-5.6 IS USM, Tripod is as follows: Dolica GX650B204 Proline GX. In addition I ran some more tests today and can confirm that as the shutter speed increased (above 1/125) the lack of sharpness decreased significantly. (LiveView and Eyeview were nearly identical) I also ran some long exposures (in excess of 1 second) and found the difference was almost non-existent as well. It appears that shutter speeds between 1/125 and 1/2 second will show some type of shutter lag or resonance from the shutter. I am speculating the longer the lens, the wider the range affected by the shutter. It may well be my Tripod but at least I know what shutter speed to stay away from when shooting at the long end of my lens for birds, etc.
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Esteemed Contributor
Posts: 2,373
Registered: ‎11-14-2012

Re: shutter speed verses sharpness: Canon 6d @300mm no IS.

I'm still confused. You are shooting a mid grade lens wide open at a rather slow shutter speed using ISO 100. What are the lighting conditions? Is the lighting that bad that you feel the AF can't do it's job?

"A skill is developed through constant practice with a passion to improve, not bought."
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