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Old Aug 22, 2007, 11:02 AM   #1
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Taken with Kodak P-712 on a tripod and the Oly 1.7 attachment.

1/200 sec
Manual exposure
0.EV
F8
ISO 200
Flash fired (need to turn that off)
72mm Full focal length
Metering Mode - Center weighted average.

My best so far.


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Old Aug 22, 2007, 11:23 AM   #2
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Taken with Sony A-100

1/250
Manual exposure
0.EV
F8
ISO200
No Flash
210mm Beercan full zoom and 1.7 multiplier
Metering Mode Multi segment
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Old Aug 22, 2007, 12:31 PM   #3
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When you get a chance I'd like to see you repeat with the following settings (on tripod as in these.)

ISO 64

1) f4 at 1/200

2) f5.6 at 1/100 or so

These setting should yield equivalent exposures.

Reasons:

1) A lot of noise showing at ISO 200

2) A 1/2.5 sensor such as on the P712 is theoretically diffraction limited at f4 but with the TCON it might actually need to stopped down a bit more to clean up aberrations. It would be a good test to see what the sharpest aperture is on that lens combination.






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Old Aug 22, 2007, 12:47 PM   #4
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Thanks for the coments ac. I will try that this evening if I get a chance.

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Old Aug 22, 2007, 12:52 PM   #5
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Hope your weathers good!
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Old Aug 22, 2007, 1:44 PM   #6
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Should be in the early evening ac.
Also, I didn't mention, both pictures were cropped but not exactly the same amount.
Should I post un cropped?

Thanks again.

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Hope your weathers good!
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Old Aug 22, 2007, 4:37 PM   #7
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I think I'd shoot for about the same image sizes. Really with the focal lengths we amateurs have available we have to crop. For comparison purposes you might want to try a 100% crop, that is blow the image up to a 100% view and then crop the central image to 640x480. I suspect that's close to what you did.

A. C.


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Old Aug 23, 2007, 8:28 PM   #8
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ac.smith wrote:
Quote:
When you get a chance I'd like to see you repeat with the following settings (on tripod as in these.)

ISO 64

1) f4 at 1/200

2) f5.6 at 1/100 or so

These setting should yield equivalent exposures.

Reasons:

1) A lot of noise showing at ISO 200

2) A 1/2.5 sensor such as on the P712 is theoretically diffraction limited at f4 but with the TCON it might actually need to stopped down a bit more to clean up aberrations. It would be a good test to see what the sharpest aperture is on that lens combination.



I tried about 6 times to get a shot last night ac with your suggestions.
For some teason, I could not get the P712 to focus.
I am not thrilled with the manual focus at all on this camera.
I also try autofocus and it to was a disaster.

Is there a resonable way to manually focus this camera. The manual is a little vague.

Thanks for your input.


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Old Aug 23, 2007, 10:09 PM   #9
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I have P712 manual. I'll match it against the Z612 manual and if it's the same I'll try it on mine.

A. C.
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Old Aug 23, 2007, 10:50 PM   #10
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Thanks a bunch. Let me know what you find out.

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I have P712 manual. I'll match it against the Z612 manual and if it's the same I'll try it on mine.

A. C.
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