Alley in Pisa, Italy

by Lars Kotthoff

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2
votes
1answer
54 views

Lighter section in photograph

I recently took pictures of a lightning storm using my camera phone (Samsung Galaxy S3). In several of the shots where I managed to capture lightning, a lighter (brighter?) vertical section sometimes ...
11
votes
1answer
2k views

Why are my results with a variable neutral density filter poor?

I bought a inexpensive variable neutral density filter, this ND2-ND400 variety. I wasn't expecting a whole lot because of the very low price point, but I think I'm either using it incorrectly or my ...
6
votes
4answers
901 views

Why is my lens only somewhat sharp near the center and very blurry on the edges?

I bought a canon 50-250mm IS lens (for my T1i), maybe two years ago and haven't used it much, but whenever I do, I always regret using it. Pictures are blurry, the depth of field too shallow and so ...
12
votes
5answers
973 views

Photo stretched at corners?

Can anybody tell me why the heads of the two women are stretched in the corners? What is the name of this defect and how could one avoid it? I'm not a photographer (though becoming one is one of my ...
4
votes
1answer
234 views

What is meant by 'centering quality'?

I'm reading lens reviews and I have encountered the term 'centering quality' a few times (e.g. http://www.photozone.de/sony_nex/720-sony50f18nex?start=1). What does this term mean? What are the ...
5
votes
3answers
2k views

How common are hot pixels on new cameras?

How common are hot pixels on new cameras?! I read that people may check up to 5 cameras at stores to actually find a perfect one, is this true? so how commons is this? what is the chance of getting a ...
4
votes
2answers
221 views

Is having a lens with vignetting a real world negative for portrait lenses?

After reading this answer for another post: I don't mind the vignetting as it actually improves the look of portraits however if you're doing astrophotography what's the point in a lens that's ...
5
votes
1answer
478 views

What defect is in this image?

I shot this image on a GoPro camera in time lapse mode. It was at ISO 100, f/3.6, 1/950sec. I also happened to be moving the camera at very high speed during the shot. What is the ligher horizonal bar ...
4
votes
3answers
533 views

Why is there a strange white spot on all of photos from my Zenit-B SLR?

I've taken some photos with my old Zenit-B camera. And I have some strange white spot on all of the photos in the upper right corner. Sometimes it is not too recognizable, but it is everywhere. ...
6
votes
1answer
224 views

What is the defect rate of lenses?

I've read a lot of reviews on sites like photozone.de, the-digital-picture.com and the likes and found that quite a few of their review samples turn out to be defective (including the premium 'L' ...
9
votes
1answer
267 views

What are these lines through my images?

I have these lines or streaks across many of the images on this roll I had developed. I can see the same lines on the negatives as well as the prints. The lines are in the exact same spot across I ...