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Thread: Lions & Tigers & Bears; Oh My

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    Default Lions & Tigers & Bears; Oh My

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    I shot this yesterday in YNP. She has twins. I like this one because of the raised paws of both bears. This cub is the one with the blond face & chest. The other one has a darker face & chest & both have a white collar around their necks. In all my frequent trips to YNP, this is a first for me. It is a very minor crop to remove some space from the LHS. A fellow photographer commented that "finding a sow with twins in good light was very special & that we should all go to church." It was a truly special experience for me.
    Andrew

    Mrk3, tripod
    Exposure Mode: Auto exposure
    Exposure Program: Aperture priority
    Exposure Time: 1 / 249
    FNumber: 5.6
    Focal Length: 700
    ISO Speed Ratings: 400
    Metering Mode: Pattern
    White Balance: Auto white balance

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    Hi Andrew,
    Nice sight. Watching them in the wild would have been a great moment. Would like to visit Yellowstone before I am gone for good. :)

    Can you please share your post processing?

    Cheers,
    Sabyasachi

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    Oops, I forgot. A very minor crop from the left, sharpened, with a very slight adjustment in curves.
    Andrew

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    BPN Viewer Tom Graham's Avatar
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    Moms face/eyes looks sharp but cub does not. Not enough DOF?
    Tom

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    Wildlife Moderator Steve Kaluski's Avatar
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    Andrew I think you have added some additional blur in the BG and have masked the mother, but forgot the little cub as there is detail in her fur on the same plane as the cub. Therefore, the cub should have a bit more detail than indicated in the image?

    Steve
    Post Production: It’s ALL about what you do with the tools and not, which brand of tool you use.

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    Except for very minor adjustments, this is the image directly from the camera. For me, only the sow was the focus. When a wild grizzly with 2 COYs is coming directly at me in the wilderness, DoF is my last consideration. Also, I was slightly to the left of the griz when I snapped the shutter so the CoY is a bit further away from me than the sow. I did not mask the sow. I did not blur the BG.

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    PeterCollins
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    i think its just the perils of shooting at 700mm with f5.6

    thin DoF

    excellent capture though

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    BPN Viewer Tom Graham's Avatar
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    So, use it as a "learning opportunity"? Perhaps use f8 as your pre-set and ISO 800? And change that if situation allows. Certainly would not lower SS any, you did good for 1/250.
    Tom

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    Publisher Arthur Morris's Avatar
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    Love the look on the face of the mother and the tiny baby. Going to f/8 would have done very, very little for the d-o-f. Too bad the little one wasn't walking faster...
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    Quote Originally Posted by Steve Kaluski View Post
    Andrew I think you have added some additional blur in the BG and have masked the mother, but forgot the little cub as there is detail in her fur on the same plane as the cub. Therefore, the cub should have a bit more detail than indicated in the image? Steve
    Steve, With all due respect it looks to me that the cub is even with the rear half of the adult and that the rear half of the adult does not have much sharply focused detail at all... It all looks as I would expect.
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    BPN Viewer Tom Graham's Avatar
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    Ok, if f8 would not be enough what would be the difference between the f5.6 used and if f11?
    Tom

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    If we assume a distance of roughly 75 feet to the subject d-o-f at f/5.6 would be about six inches past the sharpest focus (on momma's eyes). At f/8 about 9 inches past there. And at f/11 about a foot past. None of those would cover the cub's eyes. (Date from here: http://www.dofmaster.com/dofjs.html)

    Folks do not understand how limited d-o-f is with super-teles and the closer the subject the worse the d-o-f.
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  13. #13
    Alfred Forns
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    Dof for that combination at 75 feet is 9.12 inches at 5.6 and 13.44 inches for f 8.0

    Artie judging form the side of the mother, the cub should be sharper? .. think the cub was run over by the masking !!

    Strong image with mother and cub in good position, just wish the little guy was a little faster !!!

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    Alfredo, I am not seeing that at all. And Andrew states that he did not mask or blur anything. Andrew, can you post a JPEG that represents the original capture?
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    So "rule of thumb" is, halve aperture, say f5.6 to f11 and the DOF doubles. Double the subject distance and and the DOF quadruples (x4). Andrew does not give his distance to bears, wonder what it was? For the image size at lens 700mm I'd guess he was more than 25m away. But don't have calculations to work backwards and show distance, camera to subject, with 700mm focal length with diagonal of 5m(?).
    Tom
    ps - "halve" is not a good word to use here is it. True 5.6 (5.5) is half, 1/2, of 11, but in light it is 1/4 intensity. (It's all related by area, the square root of 2, 1.414, but that also doesn't help for a clear unambiguous understanding). Help!!!
    Last edited by Tom Graham; 05-12-2010 at 07:19 PM. Reason: change word, adde ps

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    Here is the original capture. When I captured the bear & cub, they were within 100 feet of me. I was standing on the road about 10 above the bears when I tripped the shutter. That said, I was concerned that the bears would soon be within the minimum focus distance of the lens. The bears were constantly moving toward & away from me. Anywhere from 300 feet away to 30 feet from my position. Andrew

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    Thanks for posting the ORIG. Unfortunately, the distance data in the EXIF is often inaccurate.:)
    BIRDS AS ART Blog: great info and lessons, lots of images with our legendary BAA educational Captions; we will not sell you junk. 30+ years of long lens experience/e-mail with gear questions.

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