I was totall shocked this morning! I was test-shooting against the morning sun (but with the sun not in the area of view!) with my new Nikon AF 85/1.8 the same scene at f/1.8, f/4.0 and f/8.0. Reviewing the images I found out that the highest contrast was achieved fully open at f/1.8
As you can imagine I was quite stunned...
The worst contrast was with f/8.0 where clearly flare raised its ugly head - or was it "ghosting"? I reshot and got the same results so without calling my procedure scientific I assume the results are valid (believe me for now, I'll post images later).
What might be the reason? Well, if you look into the lens from the front side and press the aperture activation button at f/4.0 or f/8.0 something bright and gleaming is reflecting the light: The aperture blades!
Hmmmm, so it might be that the reflections of the sun shining on the aperture blades reflecting back to the rear of the front lens(group) were the reason for the reduced contrast
Now someone tell me: Did you ever encounter a similar effect?
Thomas (beware: Nikon-fanboy and moderator!) My Lens Reviews
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