Question about digital "artifacts"

Canon EF 70-300mm f/4.5-5.6 DO IS USM

09/20/2004 09:04:32 PM · #1

I have a Nikon D70 which is my first digital SLR and I'm noticing that some of my pics, especially when there is direct sun or "hot spots", have a purple colored halo or artifact around the subject. It's not very big or too noticeable and doesn't seem to happen all the time either.

Is this problem common, and is it related to the sensor not being able to handle the light, or do I need to upgrade the quality of my lenses?

Thanks

cpanaioti

Canon EOS-40D

09/20/2004 09:05:31 PM · #2

Do you have a sample picture you can post to illustrate what you've described?

ramevi

Sony Alpha a7 II

Sony Sonnar T* FE 55mm f1.8 ZA

09/20/2004 09:11:31 PM · #3

It sounds like a lens issue to me, any sample?

Sony Sonnar T* FE 55mm f1.8 ZA

09/20/2004 09:19:13 PM · #4

Hope you can see it on this pic. It's on the bird's beak. If not I can go to the original and crop just that area for a closer view.

ramevi

Sony Alpha a7 II

09/20/2004 09:23:33 PM · #5

I'm glad to say that i don't see any problem (at least in this one). Had you tried adjustin the WB?

ramevi

Sony Alpha a7 II

Sony Sonnar T* FE 55mm f1.8 ZA

09/20/2004 09:23:46 PM · #6

Originally posted by ramevi:

I'm glad to say that i don't see any problem (at least in this one). Had you tried adjusting the WB?

RHoldenSr

Canon EOS-5D

Canon EF 70-200mm f/4.0L USM

09/20/2004 09:27:19 PM · #7

Try this:

How To Repair Chromatic Aberrations With Adobe Photoshop

Canon EF 70-300mm f/4.5-5.6 DO IS USM

09/20/2004 09:40:23 PM · #8

Okay, here are two cropped areas with the problem. Obviously the tree limb was not an in-focus area of the pic, but I'm surprised to see such an obvious purple line. Is this common and what is the cause?

cpanaioti

Canon EOS-40D

09/20/2004 09:47:49 PM · #9

I remember a discussion about this when the D70 first came out. I believe it was discussed at length in the D70 forum at dpreview. Try the link that RHoldenSr posted. It may solve your problem.

gorke

09/20/2004 09:49:45 PM · #10

//www.dpreview.com/learn/?/Glossary/Optical/Chromatic_Aberrations_01.htm

It's also known as ''fringing.''

kreybar

09/20/2004 09:51:31 PM · #11

I'm gonna go out on a limb here (LOL) & raise the issue of what a polarizer might have accomplished ; your fast , harsh light is coming from 80-90 degrees and you have an obvious extreme separation from very bright to shadow .A polarizer would have reduced the reflection & at worst would have acted as an ND filter .The trick lies in recognizing htese opportunities and utilizing them to your advantage .