purple fringing

[diver88]

:):)

while trying out my new 50mmf/1.8 Nikkor lens, I'm getting a HUGE amount of purple fringing in the well lit areas.. whats up? any ideas?

diver88:):)

[Scott D]

Hummm... I thought someone posted a question on that & I saw an answer. But I can't remember nor can I find it. So can't help...

I'm assuming of course this guy's not your photo assistant and in the room when you're taking the pictures.



If he is, that could be part of the porblem....

[Tom Barry]

Purple fringing is usually a problem for compact cameras with tiny sensors, not digital SLR's with interchangeable lenses. I think Scott may be on to something if you 're talking about indoor photography; what's in the room that could reflect onto shiny surfaces? I think we need to know more and see some examples before trying to figure out what's going on...

[diver88]

:)

doing something wrong and I don't know what. this is the best
picture I got using the 50mm f/1.8. also, my camera would not operate unless the lens was set and locked on f/22 ??



this is what I called purple fringing, the watch was in a light tent and nothing purple anything near it.. AAARRRRG

any ideas?

No Scott, Barney was not helping me ..

Diver88:):)

[Tom Barry]

What model Nikon camera are you using? The lens may not be fully compatible if it is an older model and the camera a new one. The lens aperture appears to be fully open rather than closed down in this picture, which may account for the appearance of purple fringing; but I am by no means sure. Have you tried switching to manual operation? I am no Nikon expert (Canon and Contax are my areas of "expertise"). Are there any veteran Nikon users out there in Watch Talk Forums land to help diver88 with this problem?

[Tom Barry]

One other thought: Is there anything on the front of the lens, such as a close-up diopter attachment? The single-element ones can cause some quality issues, which is why I prefer to use an extension tube for closeups with non-macro lenses...

[diver88]

:)

thanks Mr Barry,

the camera is a d40 Nikon 6.1 mp.
I bought the lens at a local camera store, and none of the
auto features work between the two.. if I had the d80 or d200
the lens would be fully auto functional, I believe.

this situation has only happened using the 50mm f/1.8 Nikkor lens, not with the "kit" lens 18-55mm. you might be on something, I don't remember if I had the Nikon Close -up NO.2 (3.0 Diopter) lens attachment installed or not. I did have it on for a few shots but removed it and things didn't seem to get better. I'll try agin today making sure not to have it on (3.0 Diopter).

but since I am new to this I don't understand how I can get any picture with anything with a wider aperature than f/22 if that is where the camera requires it to be locked to operate? the f/1.8 fast lens is why I bought it to begin...

thanks for your help..

diver88:):)

[Tom Barry]

The Nikon close-ups have a good repute. I think the ones I have are in fact two-element Nikons, but I have no idea which box of seldom-used goodies they are in. Anyhow, I think the problem is the incompatibility of the old lens with the modern camera. I'd go back to the store and see if someone there can suggest a solution. In the interim, I'd use the 18-55 kit lens in preference. These kit lenses are usually better than their reputation.

[Steve]

What you're seeing is known as "chromatic abberation". It's most prevelant in areas of black and white; or, as seen in your photo, an area where there's a lot of reflection.

In my experience, this is almost always caused by the lens. The quality of the optics has the single biggest influence on this.

Another thing I notice is that your white balance appears to be off quite a bit. What type of lighting are you using? You might want to compensate for that, as that could have some impact, as well...

[diver88]

:)

the lighting was three 100w daylight temp 6500K bulbs (florescent) outside of a light tent, at night. the lens being set at f/22 is what I don't get, the camera would not operate unless this was done.. I'm calling the store where I got it and see if the gaps can be filled in a bit..

diver88:):)