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FORUMS Photo Sharing & Visual Enjoyment Motorsports 
Thread started 26 Mar 2009 (Thursday) 18:46
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A few more from Sebring

 
John ­ Thawley
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Mar 26, 2009 18:46 |  #1

Here are a few more favorites from the 12 Hours of Sebring.


  1. http://www.trackbytes.​com …045.jpg?picture​Id=2025011 (external link)
  2. http://www.trackbytes.​com …621.jpg?picture​Id=2025004 (external link)
  3. http://www.trackbytes.​com …074.jpg?picture​Id=2025057 (external link)
  4. http://www.trackbytes.​com …473.jpg?picture​Id=2024991 (external link)
  5. http://www.trackbytes.​com …058.jpg?picture​Id=2024978 (external link)
  6. http://www.trackbytes.​com …720.jpg?picture​Id=2024987 (external link)
  7. http://www.trackbytes.​com …352.jpg?picture​Id=2024977 (external link)
  8. http://www.trackbytes.​com …945.jpg?picture​Id=2024981 (external link)

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Apexer
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Location: PNW - USA
     
Mar 26, 2009 19:19 |  #2

Love em all!! I wish i could have been there - thank gawd for SPEED.

Quick question - On number 5 - Ive seen others as well that are sharp in the center, and soft/motion blur on ends of the car. What causes this ? i have an idea, but would like a definitive answer.

Number 3 - calendar material.

I just saw your gallery in "Wheels on Walls" The CTS-V shots are phenomenal, the perspective was hot. Love that car.


Mark
http://www.crollhausph​otography.com/ (external link)
7D
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John ­ Thawley
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Mar 26, 2009 21:20 |  #3

Apexer wrote in post #7606132 (external link)
Love em all!! I wish i could have been there - thank gawd for SPEED.

Quick question - On number 5 - Ive seen others as well that are sharp in the center, and soft/motion blur on ends of the car. What causes this ? i have an idea, but would like a definitive answer.

Number 3 - calendar material.

I just saw your gallery in "Wheels on Walls" The CTS-V shots are phenomenal, the perspective was hot. Love that car.

Well... I will tell you my interpretation. You will get people that want to give you all the geometrical jargon etc. etc. ... but simply put, it's a bit of a geometric phenomenon based on the angle of the car's path as it relates to the face of the lens... or more accurately, the face of the film/sensor.

Only objects traveling perfectly parallel to the lens face or film plane can remain sharp. So, if you are panning left to right, you are actually moving in a modified arc. Now the car is coming at you at an angle.

Keeping in mind that the camera "reads" the front of the car as traveling at a quicker rate of speed than the back of the car, what remains sharp will depend on what part of the car is perfectly parallel to the face of the lens as you are moving through your pan. Hence, the reason we miss. :)

Just put the lines of paper. Draw your arc and draw the line of travel (angle) of the car. What our goal as photographers is, is to have that intersection happen where and when WE want it ot happen. Obviously, that's not always the case.

In a perfect world, you'd want the car to seem to fixed to the end of a pole that is attached to your lens. You move... the car moves with you.

Now, the slower the shutter, the more those soft areas will become apparent. The "perfect" spot or the interesction of your arc and the cars travel is less because the aperture/shutter is open longer. That's why we call it dragging the shutter... the visual is slurred or blurred.

So a faster shutter speed can cure some of the effect... but also change the look of the image. My personal taste is an exaggerated slow shutter... and let the blur work for you. But it's personal taste.

This entry on my blog might give you more insight on how I approach it. Just keep in mind, other opinions may differ. This is what works for me:

http://www.johnthawley​.com …-shot-taking-control.html (external link)


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| 2008 Year In Review (external link) |
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Xtralight
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80 posts
Joined Nov 2007
Location: Quebec, Canada
     
Mar 26, 2009 22:03 |  #4

I really love your pictures! Your panning technique blog very interesting.




  
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Apexer
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357 posts
Joined Dec 2008
Location: PNW - USA
     
Mar 26, 2009 22:30 |  #5

John Thawley wrote:
Well... I will tell you my interpretation. You will get people that want to give you all the geometrical jargon etc. etc. ... but simply put, it's a bit of a geometric phenomenon based on the angle of the car's path as it relates to the face of the lens... or more accurately, the face of the film/sensor.

Only objects traveling perfectly parallel to the lens face or film plane can remain sharp. So, if you are panning left to right, you are actually moving in a modified arc. Now the car is coming at you at an angle.

Keeping in mind that the camera "reads" the front of the car as traveling at a quicker rate of speed than the back of the car, what remains sharp will depend on what part of the car is perfectly parallel to the face of the lens as you are moving through your pan. Hence, the reason we miss.

Just put the lines of paper. Draw your arc and draw the line of travel (angle) of the car. What our goal as photographers is, is to have that intersection happen where and when WE want it ot happen. Obviously, that's not always the case.

In a perfect world, you'd want the car to seem to fixed to the end of a pole that is attached to your lens. You move... the car moves with you.

Now, the slower the shutter, the more those soft areas will become apparent. The "perfect" spot or the interesction of your arc and the cars travel is less because the aperture/shutter is open longer. That's why we call it dragging the shutter... the visual is slurred or blurred.

So a faster shutter speed can cure some of the effect... but also change the look of the image. My personal taste is an exaggerated slow shutter... and let the blur work for you. But it's personal taste.

This entry on my blog might give you more insight on how I approach it. Just keep in mind, other opinions may differ. This is what works for me:

Thank you, you are too kind with your time. I'll be honest - I wasn't very close as to my idea of what caused the issue. I'm learnin' though.

Your images are inspiring - thanks again.


Mark
http://www.crollhausph​otography.com/ (external link)
7D
30D
Stuff

  
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KevB
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Likes: 2
Joined Apr 2006
Location: UK
     
Mar 27, 2009 03:02 |  #6

These are outstanding. Great work.

Kev


My Gear., 5D MkII, G11, Canon 70-200mm f2.8L IS, Canon 17-40mm F4 L, Canon 24-105mm F4 L, SigmaLux 50mm F1.4 :D, Canon 1.4x MkII tc, Canon 2x MkII tc,Canon 580ex MkII.
http://www.kevinbrycep​hotography.co.uk/ (external link)

  
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A few more from Sebring
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