D50: Digital Green Dot on photo
Has anyone else ever had this happen:
Towards the lower right hand corner there is a green dot. I left the image kind of big so it is noticable. This happened in two out of about 200 pictures I took last night while doing some sunset photo taking.
#1. "RE: D50: Digital Green Dot on photo" | In response to Reply # 0Fish_Face Registered since 29th Jun 2007Sat 30-Jun-07 04:16 PM
I'm no expert but it looks very much like ghosting, caused by the bright light of the sun reflecting inside the lens. If you have a protective filter on the front of the lens, it may well be better, if not gone, when that's removed.
My protective filter is already horrible and smeary, and in challenging lighting it doesn't seem to introduce flare, but makes existing flare pretty nasty.
#2. "RE: D50: Digital Green Dot on photo" | In response to Reply # 1brandon_w Registered since 23rd Apr 2007Sat 30-Jun-07 06:26 PM
That makes sense, I've never seen the flare manifest itself in that way but it does make sense. I'll take my filter off next time.
That shot is actually of the moon last night, took it after the sun was down, not much of a shot.
#3. "RE: D50: Digital Green Dot on photo" | In response to Reply # 2alembicbassman Registered since 30th Oct 2004Sun 01-Jul-07 06:17 AM
Light also reflects back off the low pass filter onto the rear lens element and is then re-reflected onto the sensor where it is recorded as a green spot.
Nikon is improving coatings on rear elements to reduce this, but only on the more expensive lenses.
#4. "RE: D50: Digital Green Dot on photo" | In response to Reply # 0
That's one of the classic side-effects of light bouncing off the sensor, against some lens element (usually a "protective" UV filter, lenses themselves are pretty well designed to not do this). The tell-tale sign is your green ghost appearing 180º around center from a bright light source.
Larry - a Bay Area Nikonian
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