Strange blue glow on lights with 40mm 1.8.

Started Jan 4, 2013 | Discussions thread
Lightshow Veteran Member • Posts: 5,981
Re: That is why I sold my Hex 40

cptrios wrote:

As Lightshow said, what you're looking at is not the standard chromatic aberration, but rather "coma." More or less every fast lens ever made exhibits a bit of this toward the edges of the frame at wide apertures - some (like the old Nikkor 35/1.4 AI-S) worse than others. It just sort of comes with the territory, so the best thing to do is usually just to either learn to work around it or live with it. One suggestion for night-time city shots would be to set the camera down on a tripod or some available hard surface and take a long exposure with a narrower f-stop. Or just appreciate the little purple butterflies!

There are lenses that are corrected to reduce/eliminate coma and other aberrations, Noct Nikkor is an example.

And as I posted before, there are alternatives.

 Lightshow's gear list:Lightshow's gear list
Sony Alpha NEX-7 Sony Alpha a7R Leica Elmarit-M 24mm f/2.8 ASPH Leica APO-Summicron-M 90mm f/2 ASPH Voigtlander 15mm F4.5 Super Wide Heliar +8 more
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