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Forums Lobby MASTER YOUR VISION Wildlife (Public) topic #151556
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Subject: "RE: sharpness: my perpetural struggle" Previous topic | Next topic
HBB Moderator Hal is an expert in several areas, including CLS Awarded for his excellent article contributions to the Resources.   Phoenix, US  Charter Member Tue 29-Jan-13 10:13 PM
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#8. "RE: sharpness: my perpetural struggle"
In response to In response to 4
Tue 29-Jan-13 10:15 PM by HBB


Bob:

I think Craig may be onto something.

My copy of the 2008 Gitzo catalog shows the Series 3 tripods suitable for lenses up to 300 mm focal length. Series 4 tripods are rated for 400 mm, and Series 5 for 500 mm. The chart does not extend to 600 mm focal length. These limits are a function of torsional rigidity.

The Nikon 300 mm lens weighs 6.4 pounds, and the 600 mm F/4.0 weighs 11.2 pounds. Add the weight of the D3S camera (2.75 pounds) and the RRS pano system to the 600 mm lens, and your are probably at something over sixteen pounds or so, which is well within the maximum load limits for the Gitzo Series 3 tripods: 26.4 pounds for aluminum legs, and 39.6 pounds for the carbon fiber legs.

As mentioned above, torsional rigidity may be an issue here, particularly if the tripod is extended to its full height. Is the tripod a three or four section leg model? The 600 mm lens has a field of view (FX format) of 4.17 degrees. If you can examine the original image above to see if the apparent movement is lateral, we may have narrowed the issue down to possible torsional movement.

Before you purchase another heavier tripod, can you repeat the test with the configuration on a concrete slab? Then capture a series of identical images (same subject and subject to lens distance, etc.) with the tripod legs at different extensions, from the shortest, collapsed configuration, to fully extended. Start with all sections fully extended, then collapse them one at a time until they are all collapsed. Examine the images at 100 percent (actual pixels) on screen and see if you can identify the configation that begins to show image blur. And, is it blurred in roll, pitch, or yaw? (It may be difficult to distinguish between roll and yaw.)

Is your location subject to heavy truck, bus, or other vehicle traffic? Our house backs up to a fairly busy arterial road and I can feel the vibration in the floor when a heavy truck goes thundering by.

If this exercise is inconclusive, we may have to look at focus issues. I assume that this issue has occurred with the 600 mm lens only, correct?

Regards,

HBB in Phoenix, Arizona
Nikonian Team Member

Photography is a journey with no conceivable destination.

  

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This is a hot, active topic!sharpness: my perpetural struggle [View all] , bobpilot Silver Member, Tue 29-Jan-13 07:19 PM
 
Subject Author Message Date ID
Reply message RE: sharpness: my perpetural struggle HBB Moderator Hal is an expert in several areas, including CLS Awarded for his excellent article contributions to the Resources.
29th Jan 2013
1
Reply message RE: sharpness: my perpetural struggle bobpilot Silver Member
29th Jan 2013
3
Reply message RE: sharpness: my perpetural struggle backpacker24 Silver Member
29th Jan 2013
2
Reply message RE: sharpness: my perpetural struggle bobpilot Silver Member
29th Jan 2013
4
     Reply message I don't think it's your tripod Bob.... Jim Pearce Silver Member
29th Jan 2013
5
     Reply message RE: I don't think it's your tripod Bob.... bobpilot Silver Member
29th Jan 2013
6
          Reply message Shoot a ruler at 45 degrees Bob... Jim Pearce Silver Member
29th Jan 2013
7
     Reply message RE: sharpness: my perpetural struggle HBB Moderator Hal is an expert in several areas, including CLS Awarded for his excellent article contributions to the Resources.
29th Jan 2013
8
     Reply message There's no need for this... Jim Pearce Silver Member
29th Jan 2013
9
     Reply message RE: There's no need for this... bobpilot Silver Member
29th Jan 2013
10
     Reply message Post them here Bob... Jim Pearce Silver Member
29th Jan 2013
11
          Reply message RE: Post them here Bob... bobpilot Silver Member
29th Jan 2013
13
               Reply message Sorry, shoot wide open Bob... Jim Pearce Silver Member
29th Jan 2013
15
     Reply message RE: There's no need for this... HBB Moderator Hal is an expert in several areas, including CLS Awarded for his excellent article contributions to the Resources.
29th Jan 2013
14
          Reply message RE: There's no need for this... bobpilot Silver Member
29th Jan 2013
16
               Reply message RE: There's no need for this... HBB Moderator Hal is an expert in several areas, including CLS Awarded for his excellent article contributions to the Resources.
30th Jan 2013
19
     Reply message RE: sharpness: my perpetural struggle bobpilot Silver Member
29th Jan 2013
12
          Reply message f/4 2000 ISO; 1/800 bobpilot Silver Member
29th Jan 2013
18
               Reply message Focus looks pretty good to me Bob... Jim Pearce Silver Member
30th Jan 2013
21
                    Reply message RE: Focus looks pretty good to me Bob... bobpilot Silver Member
30th Jan 2013
22
     Reply message RE: sharpness: my perpetural struggle backpacker24 Silver Member
30th Jan 2013
23
Reply message RE: sharpness: my perpetural struggle nrothschild Neil is an expert in several areas, including camera support
29th Jan 2013
17
Reply message RE: sharpness: my perpetural struggle bobpilot Silver Member
30th Jan 2013
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     Reply message RE: sharpness: my perpetural struggle nrothschild Neil is an expert in several areas, including camera support
30th Jan 2013
24
     Reply message RE: sharpness: my perpetural struggle bobpilot Silver Member
30th Jan 2013
25
          Reply message RE: sharpness: my perpetural struggle nrothschild Neil is an expert in several areas, including camera support
30th Jan 2013
26
          Reply message RE: sharpness: my perpetural struggle nrothschild Neil is an expert in several areas, including camera support
30th Jan 2013
27
               Reply message RE: sharpness: my perpetural struggle backpacker24 Silver Member
30th Jan 2013
28
                    Reply message RE: sharpness: my perpetural struggle bobpilot Silver Member
30th Jan 2013
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     Reply message RE: sharpness: my perpetural struggle nrothschild Neil is an expert in several areas, including camera support
30th Jan 2013
31
          Reply message RE: sharpness: my perpetural struggle bobpilot Silver Member
30th Jan 2013
32
               Reply message RE: sharpness: my perpetural struggle nrothschild Neil is an expert in several areas, including camera support
30th Jan 2013
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               Reply message RE: sharpness: my perpetural struggle bobpilot Silver Member
31st Jan 2013
35
               Reply message RE: sharpness: my perpetural struggle dm1dave Administrator Awarded for high level knowledge and skills in various areas, most notably in Wildlife and Landscape Writer Ribbon awarded for his excellent article contributions to the Nikonians community
31st Jan 2013
34
                    Reply message RE: sharpness: my perpetural struggle bobpilot Silver Member
31st Jan 2013
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                    Reply message RE: sharpness: my perpetural struggle Bump57 Silver Member Awarded for his high skill level in Landscape and Nature Photography and willingness to share his learning experiences to help others. Donor Ribbon awarded for his support to the Fundraising Campaign 2014 Laureate Ribbon awarded as a winner in a Nikonians Best of Images Annual Photo Contest
31st Jan 2013
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Reply message RE: sharpness: my perpetural struggle Bump57 Silver Member Awarded for his high skill level in Landscape and Nature Photography and willingness to share his learning experiences to help others. Donor Ribbon awarded for his support to the Fundraising Campaign 2014 Laureate Ribbon awarded as a winner in a Nikonians Best of Images Annual Photo Contest
30th Jan 2013
30
Reply message Bob, did you re-shoot that bolt? Jim Pearce Silver Member
31st Jan 2013
38
Reply message RE: Bob, did you re-shoot that bolt? bobpilot Silver Member
31st Jan 2013
39
     Reply message RE: Bob, did you re-shoot that bolt? Lunastar Silver Member
01st Feb 2013
40
          Reply message RE: Bob, did you re-shoot that bolt? bobpilot Silver Member
01st Feb 2013
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          Reply message RE: Bob, did you re-shoot that bolt? bobpilot Silver Member
05th Feb 2013
42
Reply message RE: sharpness: my perpetural struggle Dubes Silver Member Awarded for his high level of achievement and willingness to help others – most notably in wildlife photography. Laureate Ribbon awarded as a Winner in a Nikonians Best of Images Annual Photo Contest
06th Feb 2013
43
Reply message RE: sharpness: my perpetural struggle bobpilot Silver Member
06th Feb 2013
44
     Reply message RE: sharpness: my perpetural struggle Dubes Silver Member Awarded for his high level of achievement and willingness to help others – most notably in wildlife photography. Laureate Ribbon awarded as a Winner in a Nikonians Best of Images Annual Photo Contest
06th Feb 2013
45

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