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Thread: Wakatobi Turtle - Here's Lookin' At You Kid!

  1. #1
    Lifetime Member Jay Gould's Avatar
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    Default Wakatobi Turtle - Here's Lookin' At You Kid!

    Attached Images Attached Images
     
    Camera: G9
    Capture date/time: 1 Oct 08; 2:40pm
    Light condition: 80' diffused
    Lens: EF 7.4 - 44.4mm
    Focal length: 7.4
    Extender: none
    Tube: none
    Flash/Comp: in camera; 0 comp
    ISO: 400
    Exp Prog: Av
    Speed: 1/60 sec
    Aperture: f/8
    Exp Comp: 0
    Metering: Center-weighted
    WB: Auto
    AF Drive: One Shot
    Tripod: no

    All C&Cs gratefully appreciated!

    Cheers, Jay

    PS: Teaching Time -

    1. When I first exported this at my usual settings, 800x800/Quality 76/240ppi the size of the file waas over 500kb. I had to reduce this to 550 x 550/Quality 40/200ppi to reduce the file size to 196. Is there that much "information" or "something" that caused this image to be so large?

    2. Determining crop factor: When someone says that the image has been 50% cropped etc, what dimensions are being compared? This image originally was 4000x3000; cropped to 2858x2819. Are you multiplying the original and resulting numbers and comparing the two results?

    Thanks,
    Cheers, Jay

    My Digital Art - "Nature Interpreted" - can now be view at http://www.luvntravlnphotography.com

    "Nature Interpreted" - Photography begins with your mind and eyes, and ends with an image representing your vision and your reality of the captured scene; photography exceeds the camera sensor's limitations. Capturing and Processing landscapes and seascapes allows me to express my vision and reality of Nature.

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    Lifetime Member Jay Gould's Avatar
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    Quote Originally Posted by Peter Kes View Post
    Hey Jay - welcome to the UW forum :), I like this a lot, your image and this extended UW dimension to Wildlife.

    Re1: you can play with the image quality in your 800x800 to reduce the size: try "Save As..." as opposed to "Save for Web": you get a slightly different save-options interface.
    Re2: I like to say what approximate percentage of the image is left, compared to original. In your case you would have a crop leaving 70% of original. If you say "this is a 50% crop", it could mean 50% of the original size, but technically you could have reduced the width and the height of the image by 50%, leaving only 25% of original ....etc.etc.etc
    Thanks Peter, I think there is a move underfoot ;) to create a couple of UW subforums here and in Macro.

    Regarding "Save for Web", I am guessing that is a PS option; I am doing my saving in LR for the moment. All of the PP for this image was done in LR - LR2.4 certainly lets you do a lot of PP!

    How did you arrive at the 70%?

    Thanks for taking the time to comment.

    More to come! :D

    Cheers, Jay

    PS: I am cheering for you countryman!!
    Cheers, Jay

    My Digital Art - "Nature Interpreted" - can now be view at http://www.luvntravlnphotography.com

    "Nature Interpreted" - Photography begins with your mind and eyes, and ends with an image representing your vision and your reality of the captured scene; photography exceeds the camera sensor's limitations. Capturing and Processing landscapes and seascapes allows me to express my vision and reality of Nature.

  3. #3
    Alfred Forns
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    Hi Jay Fully agree with Peter !!!

    For this image you need a different camera, the G9 will do fine with macro but not larger subjects. That camera is 35mm at the wide end and UW will be closer to 50mm Needing to back off the subject will increase the distance light has to travel to and from the flash ... at ten feet you get zero reds!!! Best to get an slr :) btw the new G10 is 28 and they might make a wa port? which would help !!

    I'm fond of turtles and enjoy how the try to hide .. .. really think they are doing a good job :)

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    Jay,

    I calculate the crop in this manner. You can just put the figures in an excel sheet for an easy calculation.

    Original image size = a*b
    resized = c*d

    % crop = {(Original image size - resized image)/Original}*100

    so for your image % crop = 100*{(4000X3000)-(2858x2819b)}/ (4000*3000) = 100*{(12000000-8056702)/12000000} = 32.86%

    That means about 33% of your image has been cropped. However, Not everyone will calculate this way and tell you that.

    I agree with Alfred. You need a macro mode.

    I am enjoying the UW images.

    Cheers,
    Sabyasachi

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    Lifetime Member Jay Gould's Avatar
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    Hi All,

    Al - UW SLR never gonna happen! For the next dive trip - I will have the G11 or G12 and an external UW light. I have to make a choice between long glass ;) or Ikelite housings for my SLR. Since I use the long glass the entire trip - rarely less than six months in length as we do six in and six out of Oz regularly - and I use the UW stuff for 2 - 3 weeks per trip, it is a no brainer! G series, Canon housing, external flash on an arm.

    Sabya - thanks!!

    Would this (red photo filter applied to most heavy cyan areas) do justice ?
    BINGO!! I downloaded the repost so that I could compare them side by side and I definitely like what you have done. Can you "sometime" provide a tutorial how you selectively removed the cyan color cast? Thanks,
    Cheers, Jay

    My Digital Art - "Nature Interpreted" - can now be view at http://www.luvntravlnphotography.com

    "Nature Interpreted" - Photography begins with your mind and eyes, and ends with an image representing your vision and your reality of the captured scene; photography exceeds the camera sensor's limitations. Capturing and Processing landscapes and seascapes allows me to express my vision and reality of Nature.

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    Lifetime Member Jay Gould's Avatar
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    Peter, thank you so much! I will practice that technique and apply it to my Wakatobi UW images before final posting on our travel blog. Cheers, Jay
    Cheers, Jay

    My Digital Art - "Nature Interpreted" - can now be view at http://www.luvntravlnphotography.com

    "Nature Interpreted" - Photography begins with your mind and eyes, and ends with an image representing your vision and your reality of the captured scene; photography exceeds the camera sensor's limitations. Capturing and Processing landscapes and seascapes allows me to express my vision and reality of Nature.

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    BPN Viewer Bruce Enns's Avatar
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    Hey Jay, a good image, especially after the fix of the cyan colour cast. I assume that you didn't use an external strobe. The other way to fix it would be to get one or even two external strobes. The Inon models are very compact and powerful, are triggered by you G9's flash via fiber optic 'cable'. and don't add the dSLR bulk to your system. These would vastly improve your ability to capture the wider angle stuff with good lighting, and also give you more flexibility with the macro shots.

    Cheers!
    Bruce

    PS Great tutorial Peter!

  8. #8
    Alfred Forns
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    Mighty fine Peter !!!!!! Thanks !!!

    Jay there is a wide angle adapter for the G10 for land use .... if that could be incorporated in the little housing with a dome port you are in business !!!! Just get a powerful strobe !!! Will work !!

  9. #9
    Lifetime Member Jay Gould's Avatar
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    Quote Originally Posted by Bruce Enns View Post
    Hey Jay, a good image, especially after the fix of the cyan colour cast. I assume that you didn't use an external strobe. The other way to fix it would be to get one or even two external strobes. The Inon models are very compact and powerful, are triggered by you G9's flash via fiber optic 'cable'. and don't add the dSLR bulk to your system. These would vastly improve your ability to capture the wider angle stuff with good lighting, and also give you more flexibility with the macro shots.

    Cheers!
    Bruce

    PS Great tutorial Peter!
    Hi Bruce, a Sea&Sea YS-110A with an optical trigger is in my future :D . I will be picking it up in September when I visit San Diego after the Jim/James/Mike show in Florida and California.

    Inon is a no go!! Inon America no longer exists; the Japanese do not care about the US market according to the dive shops I frequent for UW stuff. http://inonamerica.com/ - IA's swan song!

    There is a G11/12 with a Canon housing is in my future too! I will either get the G11 in March before my Galapagos dive, or perhaps the G12 October 2010 before returning to Indonesia.

    There is an ability to machine an adaptor to change the front of the Canon "G" UW housings and use wider wide angle lenses - that is over the top for me. http://wetpixel.com/forums/index.php?showtopic=25770

    The G10 went wide and shortened the telephoto; good enough with a proper strobe.

    Unlike what BPN is putting me through with above the water gear :p :) - I know I am putting myself through it and having a ball (I love you guys and BPN - best thing I ever found on the Net), I have no intention of going beyond a stock Gx, Canon housing, and a YS-110A. My brother is a pro UW shooter - he can carry the 50D, Ikelite housing, two huge strobes, +++; not me - simply do not dive enough to justify the logistics of shipping all of the gear AND all of the dry gear.

    Cheers, Jay
    Cheers, Jay

    My Digital Art - "Nature Interpreted" - can now be view at http://www.luvntravlnphotography.com

    "Nature Interpreted" - Photography begins with your mind and eyes, and ends with an image representing your vision and your reality of the captured scene; photography exceeds the camera sensor's limitations. Capturing and Processing landscapes and seascapes allows me to express my vision and reality of Nature.

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