mattdm
  • Member for 11 years, 3 months
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Why are colors brighter and more red on Sony HX100v?
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Camera sensors are linear capture devices, which does not match well to the human perception of light and color. So, after the raw image is taken, it is usually converted to something with more "pop" ...

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How to submit photos in the website?
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(This question is being migrated to the meta site, so I'm answering as if this is already there.) You will need 11 reputation to participate in the contest, because that is the threshold at which you ...

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Why doesn't my Sigma lens autofocus if the subject is initially way out-of-focus?
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Take a look at Why can't my SLR autofocus on certain parts of a scene? While the basic premise is different — there, parts of the scene which don't have much contrast no matter how well-focused ...

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What are good test shots for finding out the capabilities of a camera?
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I very big fan of the approach I took in Is the Panasonic Leica Summilux DG 25mm f/1.4 as good as the name implies?. That is: Make sure you have a long enough time to really get a feel, and get over ...

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2 Images, same object: tone difference and alignment
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The easiest (and perhaps "proper") way to do this is to use a color reference card in each of your photos. Otherwise, it's actually quite hard to automate. In most cases, this can simply be a neutral ...

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What does "focal length multiplier" mean?
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"Focal length multiplier" is another term for "crop factor". It is used for comparing the angle of view of a lens of a given focal length across film or sensor size. This is explained in more detail ...

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Should beginners start post-processing soon?
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I don't think post-processing is essential for beginners in itself — there are many things to learn, and many approaches to getting there. However, it is essential to review your photographs with a ...

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How to perform a proper lens comparison test?
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My suggestion is to avoid test charts. For these to be really meaningful, conditions have to be carefully controlled, and when comparing models of lenses generally, it helps to have multiple copies of ...

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Resolution and frame size for TV RAW processing
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An HD TV has one native resolution (1920x1080 for a 1080p or 1080i display). If you use anything lower than that, there will be upscaling, which, since it's a TV, will probably be optimized for video. ...

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What is difference between autofocus and built-in autofoucs motor?
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A quick short answer: bodies without a motor rely on a motor in the lens. All current Canon lenses work this way, as do all new Nikon lenses. See the questions I marked as duplicates above for more.

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Aperture priority mode in high speed lens while photographing more than one person
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Aperture priority doesn't automatically mean "widest aperture". It means "use the aperture I tell you to". If you need more in focus, you have no choice but to set a narrower aperture for more depth ...

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Can ISO vary on different cameras?
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There are two parts to the question here: better quality, and different exposure. The better quality answer is simple: yes, there are significant differences. Cameras with larger sensors have an ...

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Can I use a photo of an iphone to sell my product?
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I am not a lawyer, but "nominative use" is a well-established affirmative defense against trademark infringement. That is, trademark grants a limited right to the owner, and not full ownership of the ...

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Digital camera with WI-FI and time-lapse function
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Any of the new cameras (like the first set from Samsung and Nikon) which include the Android operating system should do this. They have wifi, and you could run one of the existing Android timelapse ...

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How long until a point-and-shoot becomes obsolete?
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It's true that technology moves very fast. I don't think we can apply a general rule, though, because good optics will stay good and brand-new cheap optics will always be poor. Particularly, ...

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How can I reverse-engineer the RAW conversion settings used in a JPEG image?
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There's no magical approach here. You'll have to look at each one. However, you have an advantage since you did the work yourself: you can, hopefully, look and be reminded of what you did. Other than ...

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Dots per inch calculation
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On edit six: 4*6*(300^2)*20 = 43200000 bits = 5400 KB = 5.4 MB. Okay, so, you're right in the multiplication here (give or take a quibble about binary vs. decimal KB and MB). That is the ...

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Help me choose: Olympus OM-D EM-5, Fujy X-Pro1, Sony Nex 7, or?
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I don't think we can make this decision for you. I've used the first two on your list, and they are very quirky cameras. Depending on how these quirks mesh with your personal quirks, you will love ...

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Does sensor size affect lens distortion?
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I realized something key in your question: ... a cropped sensor works [...] like printing off a 8x10 picture and then cutting out the 4x6 that I like: the picture doesn't change, only my view of it....

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Does the X-Pro 1's "Lens Focal Length Setting" do anything with automatic lenses?
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Based on my experimentation: no, it doesn't do anything. It's just there for the future, and it's just a UI quirk that it's not grayed-out.

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Why is there no full-frame but low res sensor?
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This is basically Moore's Law at work. Manufacturing technology for sensors follows the same basic rule as for any other chip: over time, the number of elements that can be put on a chip doubles for a ...

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Can any point-and-shoot camera take RAW images?
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Arguably, no point and shoot camera can shoot RAW, because if it could, it would cease to meet the definition of a simple camera you just point and shoot and get automatic acceptable results. I know ...

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Why does my Nikon D3100 no longer auto-focus correctly?
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Given that it never works, and that the problem occurs with both lenses, I think something is broken in the camera body. Since you bought it just this year, and since you haven't treated it roughly, ...

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Is there an installer for the Windows version of the latest Resynthesizer plugin for Gimp?
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It doesn't look like there's an official one. The README file for the new version (wow — about time!) says Building on other platforms (On the darkside OS, who hijacked a common word for ...

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What is a "Full Permission License"?
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I'm going to take an alternate view. Stock photography, almost by definition, is generic. It can take a lot of skill and work, and certainly some creativity and visual sense — but ultimately, it's ...

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Where can I find posing guides & resources online?
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See this question right here on this site: What portrait posing rules do you recommend for studio photography?

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Are equipment reviews from websites like kenrockwell.com and bythom.com reliable?
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I want to add just a cautionary note about one particular often-referenced Thom Hogan article, Meters Don't See 18% Gray. Take a look at Jerry Coffin's response to that in this question/answer: What ...

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A website that can help me in choice of new lens?
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The big online camera/electronics stores offer searches that encompass some of this: B&H Photo SLR Lenses: check the options in the left column. Adorama SLR Lenses: look in the right column. ...

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Why is my Pentax K-x producing artifacts and color banding?
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Edit: the below isn't correct, as seen in the full version NickR posted to dropbox — the compression of the original image is low, relatively high-quality and wouldn't cause this. But I'm leaving it ...

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Standard Lens Digital Cameras
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In addition to the mirrorless interchangeable-lens cameras, there are several non-SLR large-sensor compact cameras on the market which come with fixed normal-range (or slightly wide) lenses. Leica X1 ...

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