My funny lenses

© Beatg
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.

Photo credits: , Beat Germann.

Your article must be written in English

January 27, 2011


Thank you all for posting your valuable inputs!! Great to be here. Best wishes to you all!

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.

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.

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

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 :)

January 05, 2011


We all get that refusal sooner or later :P

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)

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.

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...

January 04, 2011


You can reply to the refusal notification email and kindly ask the editor for further explanation.

January 04, 2011


Hmm wanted to add a refused image as well to show the difference, but cannot upload it, sorry

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