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AF Nikkor 20mm D lens - corners on D700.

polardan

Gisborne, AU
15 posts

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polardan Registered since 30th Sep 2012
Sun 30-Sep-12 05:25 AM

Recently I have problems with my AFD lens and had it repaired (they took two goes). It seems to be fine on most day to day shots, with the noticeable light dropoff on the corners of the images at F2.8.

I took it on a trip under a new moon to the clearest of southern skies and took great delight at showing my boy the wonders of the universe, and took this image.

https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-ash3/549569_10151003297916537_923056482_n.jpg

30 Second exposure, F2.8, ISO4000 D700. In the centre of the image the stars are sharp and round as seen on a sideways southern cross by my left shoulder

http://i663.photobucket.com/albums/uu353/stallie001/Lens%20problems/ScreenShot2012-09-30at144343.png

However on the corners of the images, the stars are very distorted, effectively ruining the picture in my opinion.

http://i663.photobucket.com/albums/uu353/stallie001/Lens%20problems/ScreenShot2012-09-30at144414.png

In hindsight I could have used a smaller aperture, but then I would not have enough light and I would need an exposure time that would blur the star trails, and make a 5yo very bored...

Is this a normal feature of the lens, or is there a continuing problem with it?

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