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1500 questions
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How can a lens like a 18-55mm have more than one focal length?
How can a lens have a range of focal lengths? Shouldn't it be a single number?
Isn't focal length supposed to be fixed for a lens of a particular shape and geometry?
What am I missing?
How many lenses are actually there in a "lens"?
Lazer
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How does the lens influence the autofocus?
I think I've more or less understood how AF works now. However, I'm not sure how the lens influences the whole process. In my recent research for my next lens I found reviews stating the one lens' AF is "dead-on" while the other one's "often fails".…
eflorico
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What should I look for when shopping for my first mirrorless camera?
I'm looking to buy a new camera. I've looked at What do I need to consider to choose between dSLR, mirrorless, or a compact as my first "serious" camera? and decided that mirrorless is right for me. But what next?
What should I be looking for when…
mattdm
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How will old M42 lenses work on a Nikon camera?
I wanted to get some cheap old lenses to use on my Nikon DX DSLR (D3100).
However, Nikon has one of the greatest flange distances of all manufacturers, which means that most lenses I can buy (M42 mount, etc) will not focus to infinity. I saw some…
JoséNunoFerreira
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How to get started with fashion photography?
So, I'm in a pickle. On a whim I decided to email a model who lives in Bloomington, IN. Told her how I admired her work and how I would like to take some photos of her in the spring at the Indianapolis museum of Art and sent the email on it's way. I…
Ben Kennett
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What software could I use for aligning time lapse stills to remove camera shake?
I've been playing around with some time lapse sequences shot from the roof of our building in New York. It's terribly windy and the resulting sequence exhibits some slight camera shake.
I'm seeking a software solution to align the images to…
Kris
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How to migrate from Picasa to Lightroom?
I've been a long time user of Picasa (the Windows desktop application, not Picasa Web Albums), and have roughly 40k photos. The photos are a mix of my own digital snapshots, and scans of my 35mm film and old family photos. Now that Google has…
Randy Orrison
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What are some good photography podcasts?
What are some good podcasts that deal with photography?
Please answer with one podcast/link/description per answer (so that members can then vote based on their opinions of that podcast).
ahockley
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Could a "universal exposure" setting be practically possible?
Not sure how uneducated this question is, but I'm interested in learning, so thanks in advance for your indulgence.
Film physically changes over the period of time it's exposed. A digital sensor, though, doesn't; it's just reading data. Is there any…
Wombat Pete
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How do zoom lenses restrict their widest aperture at the telephoto end?
Does the aperture ring lock the apertures beyond, say 5.6 at length lens's telephoto end?
Does the lens introduce an obstacle to the aperture ring so the lens can't be opened anymore beyond the aperture at the telephoto end?
And why do lenses behave…
user152435
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2 answers
Software that guesses which algorithm saved a given JPEG
Some time ago, I found a piece of software that would provide a good guess on the software/algorithm used to save a JPEG.
If I recall correctly, it would analyze something like the compression artifacts and compare it against a known database. The…
Roflo
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Where can I find posing guides & resources online?
What resources are available online to give ideas for poses. Is there some type of catalogue of common poses?
Ken
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Why is there the illusion of detail in photographic noise?
I have the following image which contains noisy mountains.
In the lower part of the image, the signal-to-noise ratio is too low to contain actual details, but when I remove all the noise from this area, it does not look natural (from my point of…
Alex
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How to store and preserve film negatives and slides?
I bought 35mm dedicated film scanner (Nikon CoolScan III) and I'm planning to digitize old negatives and slides I found at home.
How should I store and preserve these slides and films after I cut them and scan? How to choose best negative…
Domas
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How do you shoot still motion portraits?
Occasionally I see shots that have motion blur around the subject ... yet the subject is in focus. They are usually shot at very slow speeds, sometimes they even have a 1 second exposure, yet the subject is in focus. Is this done mostly in post, or…
Sam Saffron
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