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Panasonic Leica DG Nocticron 42.5mm F1.2 ASPH samples gallery:
P1110887
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P1110887
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Panasonic Leica DG Nocticron 42.5mm F1.2 ASPH samples gallery
Panasonic Leica DG Nocticron 42.5mm F1.2 ASPH samples gallery
(33 photos)
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Available sizes: Small, Medium, Large, Original (4608×3456, 6.1MB)
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Uploaded: Jan 8, 2014 (UTC)
Focal length: 43 mm
Shutter speed: 1/2500 sec
Aperture: F1.2
ISO: 200
Exposure comp.: ±0.00

Comments

Total comments: 5
dagobah
By dagobah (7 months ago)

DOF doesn't look different for f1.2 vs. f1.4. They also meter the same (200 iso, 1/2500s). Very slight difference in DOF comparing f1.2 to f1.8. Most sensors don't record the light past a certain aperture (due to the physical shape of the electronic pixel well), so that may be about f1.6 or f1.4 for gh3.

Comment edited 2 minutes after posting
0 upvotes
Karroly
By Karroly (7 months ago)

There is a reason why the shots at F1.2 and F1.4 have the same shutter speed for same ISO. Apart from the fact that the ratio between 1.4 and 1.2 is just a little bigger than 1/3 EV, and if we assume the diameter of the iris matches the theorical aperture value, stopping down a little bit from full aperture only stops the peripheral rays where the lens is generally darker due to vignetting. It would be complicated to modify the relationship between the iris diameter and the theorical aperture value to compensate for the vignetting. The small over or under exposure does not worth it.

Comment edited 39 seconds after posting
0 upvotes
rfsIII
By rfsIII (7 months ago)

Are we sure it's not just a rounding error in the calculation of the f-stop value? I've noticed that most lenses are about a third to a half stop slower than their advertised aperture when tested. IOW most lenses sold as f/2.8 seem to have actual aperture values of 3.2 or 3.3. And most of the camera body tests I've seen indicate that the ISO values aren't calibrated very precisely.

Or are we saying the same thing in different ways?

0 upvotes
Karroly
By Karroly (7 months ago)

I am not impressed by this not so shallow DOF...

1 upvote
Ladeiro
By Ladeiro (7 months ago)

F1.2 Great!

0 upvotes
Total comments: 5