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Old Nov 21, 2010, 2:43 PM   #1
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Default Vignetting at 18mm standard first series 18-55mm

Not very scientific but here are shots taken out my window, they had the contrast increased to show the effect more clearly. Notice that by f22 the DOF is so great it is picking up spots on the window glass although the lens is focused near infinity.

BTW I don't see this vignetting as a necessary negative, it can be fixed in software and, except when trying to shoot a panorama, it can actually have a positive effect on the final image, creating a frame of sorts.
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Riverview, NB, Canada
http://aicphotography.blogspot.com/
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Current equipment
Pentax K5, K3:
FA 35mm f2, FA 50 f1.4, FA 28-70mm f4, FA 28-80mm f3.5-5.6, FA 80-320mm f4.5-5.6, F 50mm f1.7, Tamron SP 70-200mm f2.8 Di, DA 10-17 f3.5-4.5, DA 14 f2.8, DA 16-45mm f4, DA 18-55mm f3.5-5.6 WR, DA 50-200mm f4-5.6 WR, AF-540FGZ

Olympus E-P2, E-P5, OM-D E-M1: 9mm to 150mm lenses

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Last edited by Monza76; Nov 21, 2010 at 5:23 PM.
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Old Nov 21, 2010, 6:55 PM   #2
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Thanks Ira for detailing the way to handle. Also get us prepare for the inevitable wintry weather too.
I recall when I had the kit lens briefly, I deliberately avoided the extreme end which means I shot at around 20mm -22 mm which was still wide enough for most occasions. I still retain the habit of not shooting my Sigma 24-60mm F2.8 at 28 mm only if I have a choice.

Daniel
currently in the palmy weather of Washington DC for the Am Thanksgiving holiday
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Old Nov 21, 2010, 7:15 PM   #3
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I think that since I can't get into the really expensive glass I have to make the best of the limitations of the lenses I have. I do have some excellent lenses such as:
FA 50mm f1.4
FA 35mm f2 AL (confiscated by my wife Annette so she would have a fast lens, the K10D didn't like it anyway)
FA 28-70mm f4 surprisingly good
DA 14mm f2.8 (which, unfortunately is one of the lenses that my K10D doesn't like so it gets used occasionally on Annette's K100D Super)
DA 10-17mm fisheye zoom, incredibly sharp
M 100mm f4 macro I need a focus aid screen for my K10D
M 200mm f4 I need a focus aid screen for my K10D

But then there are the mediocre ones:
DA 18-55mm kit
F 100-300mm f4.5-5.6 (which isn't bad in really good light)

Personally I do find that some of the limitations can be used in your favour, for instance the F 100-300mm does not focus well on long shots but at near its minimum focus distance it is very good so I like using it as a macro of sorts. I have already mentioned the vignetting of the kit lens at 18mm but that can actually frame the image in some cases.

Remember that Lomography is the art of taking artistic images with really bad cameras. Pentax doesn't make anything that bad.
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Ira
Riverview, NB, Canada
http://aicphotography.blogspot.com/
_______________________________
Current equipment
Pentax K5, K3:
FA 35mm f2, FA 50 f1.4, FA 28-70mm f4, FA 28-80mm f3.5-5.6, FA 80-320mm f4.5-5.6, F 50mm f1.7, Tamron SP 70-200mm f2.8 Di, DA 10-17 f3.5-4.5, DA 14 f2.8, DA 16-45mm f4, DA 18-55mm f3.5-5.6 WR, DA 50-200mm f4-5.6 WR, AF-540FGZ

Olympus E-P2, E-P5, OM-D E-M1: 9mm to 150mm lenses

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Old Nov 21, 2010, 8:13 PM   #4
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Very interesting results - Thanks for sharing!!
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Old Nov 21, 2010, 8:52 PM   #5
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The other thing is that you can reduce vignetting by software. It might not handle it completely, but can do quite a bit.
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