Tuesday, July 10, 2007

Wilson's Promontory- birds



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Super-Takumar 135mm f/3.5 with a short extension tube, uncropped
Subject to lens distance: ~2m






The bulu-test

100% crop from the preceding image


"Albert mentioned that the test for a lens' sharpness would be the bulu-test, where you see if the sensor is capable of resolving the individual strands of pubic/facial or head hair." - from tanyeehou.blogspot.com




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Super-Takumar 135mm f/3.5






"Shit in my camera bag, and you'd wish I was never born."

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Super-Takumar 135mm f/3.5


Interestingly, we are starting to see some JPEG compression artefacts. The sharp boundary between the subject in focus and the bland, defocused background causes a boundary layer of stray pixels to adopt the colours of the subject.

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6 Comments:

Blogger Dr. Tan said...

Well, that artefact could be caused by in camere sharpening. I leave it to '0,0,0' for all 3 parameters.

8:31 pm, July 10, 2007  
Blogger Lao Chen said...

Nope, this is associated with the high compression i selected after resizing the images. 80kb for a small image would be too expensive bandwidth-wise.

8:55 pm, July 10, 2007  
Blogger Wuching said...

polly wanna cracker

7:57 am, July 11, 2007  
Blogger albert said...

Heh, Yee Hou added the pubic hair bit. Facial hair is easier because of lighter skin providing a contrasty background. I'm wondering why you didn't whip out the 400mm F6.3 though. :D

1:08 pm, July 11, 2007  
Blogger albert said...

Also, I think the point of focus was on the left eye of the bird, where you can properly do the bulu test. It needs to be focused on the bulu.

1:11 pm, July 11, 2007  
Blogger Lao Chen said...

Cos the monster was in the car boot. But even with all extension tubes screwed on, the 400mm 6.3 cannot give magnifications that are significantly larger than this. And there's the problem of light...

The left eye was approximately on the plane of focus, but the plane was slightly rear of the eye. The right eyelashes are slightly easier to see. And the right view is more aesthetic too- the red-green boundary is distinct.

10:13 pm, July 11, 2007  

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