My funny lenses

posted on 4th of january, 2011

© Beatg (Help)
Sometimes I am a bit confused about the comments of the editor given at refused pictures. The most common comment reads like this:

"Poor optical performance due to low lens quality, such as lens fringing, chromatic aberrations, uneven sharpness in focus area."

However the next shot is accepted even if its taken with the same camera and the same lens. How can my lens go bad and then good again?

My camera should not be a problem as I use a Nikon D2x and Nikon lenses.

Can maybe somebody shed light on my funny lenses? Would be grateful, as I kinda don't like that particular comment.

Thanks for helping out.

Comments (11)

Posted by Beatg on January 27, 2011
Thank you all for posting your valuable inputs!! Great to be here. Best wishes to you all!
Posted by Lindamstyle on January 06, 2011
I don't know what zoom you used but some zoom lenses provide very different qualities (in sharpness, aberration and contrast) at different focal lengths and aperture settings. In test laboratory, the charts they provide, looks like a roller coaster ride.
It's best to avoid those unless you don't bother shooting just at some settings.
I use lenses that offers very even quality, corner to corner, at all focals. Even so, in some extreme situations, I get purple fringing that needs to be fixed in software.
Posted by Martinisaac on January 05, 2011
I'd also be careful about using a smaller lens opening (i.e f22) as you can get diffraction, which reduces sharpness.
Posted by Beatg on January 05, 2011
Thank you so much. I really will have to check and work more with the aperture, as suggested. All your comments were really helpful, thank you so much
Posted by Stephenuk on January 05, 2011
When using apertures at near or wide open, only the light that falls on the subject will be 'sharp', other light (out of focus) will 'splatter' accross the sensor. On the other hand shooting with a small lens opening say f22 will reduce the blast of light and increase sharpness and detail because it did not 'splatter'. Cant remember where I read this but hope its helps :)
Posted by Thanatonautii on January 05, 2011
We all get that refusal sooner or later :P
Posted by Spectrumstudios on January 05, 2011
The differences in the images would be cause because of the different apertures that you would be using. When you shoot on a wide apertures, more of the lens is used, all the way to the edges. Similarly when shooting on a small aperture, the light come through the center of the glass.

Lens glass is the best quality around the center. The outside of your lenses may be damaged or just low quality.

To fix your issue I recommend shooting on aperture priority. If there is enough light set your lenses to their prime aperture (approximately 8-11. Higher or lower depending on the range of your lens)
Posted by Rosedarc on January 04, 2011
I've got a Nikon zoom that performs very well on average, but my photos get very noisy as soon as the light is insufficient, especially at either end of the zoom. Some photos come out good at 400 ISO but many others have too much noise. It also gives me a lot of chromatic aberrations when I shoot trees, where the difference between light and dark areas is strong. Basically my zoom is very good but it definitely has its limitations.
Through experience you should be able to understand what your lenses can handle and what they cannot, and also your eyes will get better at seeing these problems before submitting the photos.
Posted by Bradcalkins on January 04, 2011
Easy - most lenses will 'fringe' around highlights, especially wide open. Similarly, most lenses get sharper in the corners as you stop down. One lens shot wide open in bright conditions can perform totally differently than when stopped down in lower contrast conditions. Take a look at this rollover comparison between the same high quality L series Canon lens wide open versus stopped down: 24L. Yet it performs nicely even wide open if the lighting is right...
Posted by Py2000 on January 04, 2011
You can reply to the refusal notification email and kindly ask the editor for further explanation.
Posted by Beatg on January 04, 2011
Hmm wanted to add a refused image as well to show the difference, but cannot upload it, sorry

Comments (11)

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Photo credits: , Beat Germann.

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I am traveling several times a year to South Asia (mainly India) I would be in a position to shoot for specific requirements. Please do not hesitate to contact me for details. Please write to: beatgermann(at)me.com Thank you

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