Butterfly

by Rodrigo

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quantifies how much detail an image can convey

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5
votes
1answer
3k views

What resolution would be needed for a billboard advertisement?

Does anyone know the required resolution for a photograph to be used on a billboard? Would the Canon 7D be able to provide a large enough file size to meet the requirements?
2
votes
2answers
367 views

What will be typical pixel count of digital camera 8 years from now? [closed]

Sorry if this question is not serious. I was discussing this with the friend and we had different opinions. I'd think others want to throw in their opinions. The question is: What will be typical ...
7
votes
3answers
1k views

Is it worth investing in a used 35 mm Film camera?

I've a Canon 60D and I'm mainly interested in shooting landscapes. I feel very interested in buying a used canon EOS film camera (since my EF lenses are compatible). I would like to take pictures ...
11
votes
3answers
2k views

Does shooting at lower RAW resolution using crop sensor camera mimics qualities of full frame cameras?

I'm not talking about changes to the focal length. I've read many post that say in full frame camera the pixel density is lower compared to crop sensor camera's and so it captures more light and has ...
2
votes
1answer
850 views

Why are low-resolution versions of my images shown in Adobe Bridge?

When I browse photos in Adobe Bridge, they are often not as sharp as they really are, as if Bridge loads a low-res version of the photo for speed. This makes it hard to pick photos that are good, as I ...
-1
votes
1answer
296 views

What's the standard photo dimension on mobile devices? [closed]

What's the standard or popular photo dimension on mobile devices like tablets and smartphones? (Android / iOS) Is it something like 1024x768 pixels?
9
votes
2answers
1k views

How do I choose which resolution (megapixel) and compression (normal, fine, superfine) to shoot in?

What do I lose if I do not shoot at maximum res? or the "superfine" setting? What are the disadvantages? I would like to learn how digital cameras save in lower resolutions jpegs. Is the extra ...
6
votes
3answers
4k views

What is the difference between image size and image quality?

I have a Casio EX-S12. It has a setting for image size, but also a separate setting for what it calls "image quality". There are three image quality values: "Fine", "Normal", and "Economy". The Casio ...
0
votes
2answers
2k views

how do you determine the size of an image based on resolution , ppi, and type?

I'd like to be able to determine the size of a an image with a particular resolution/ppi for JPEG & PNG formats. Are there any online tools to do this?
8
votes
6answers
36k views

Is it possible to increase the pixel density of an image?

I have taken a picture whose resolution is less. I can resize the image easily (i.e I can scale to higher resolution) but the image quality goes for a toss, which is true because the image might not ...
3
votes
2answers
3k views

What's a good iPhone application to view large images (5000px+)?

I want to view large images that I transfer to my iPhone from my computer. Obviously I cannot view them completely at a 1:1 ratio, but rather I want to be able to zoom in to the 1:1 ratio. The only ...
7
votes
2answers
2k views

Can a video camera produce a high quality still photo shoot?

I have a high-end digital video camera able to output a higher number of megapixels than my digital photo camera. This is true only when using the camera to take stills. Is there anything that's going ...
18
votes
4answers
2k views

Does it give higher quality to shoot in low-res mode in-camera, or to downsize high-res photos later?

Suppose you want to store your photos at some lower resolution, let's say about ~1 MB large. You own a camera able to make photos at 5 MPix and more. And, you want to have the maximum quality at the ...
9
votes
1answer
1k views

Can the slant edge SFR method measure lens resolution greater than the Nyquist limit for the camera sensor?

The slant edge SFR method has become the standard for measuring resolution of lenses and camera systems. It works by scanning a five degree slanted edge to calculate a line spread function. This is ...
15
votes
3answers
6k views

What is the Nyquist Limit and what is its significance to photographers?

The Nyquist Limit is frequently mentioned in the context of lens and sensor resolution. What is it and what is its significance to photographers? Here is an example of it being used by DPReview.com ...
2
votes
1answer
345 views

Is the BxU measure of lens resolution still used by anyone?

The background In 2004 DxO released DxO Analyzer. It pioneered a new measure of lens resolution that it called BxU or Blur Experience Unit. Luminous Landscape reported on it (DxO Explained) and ...
11
votes
4answers
2k views

Is it true that '80s 35mm photofilm had quality corresponding to 24 megapixels?

Is it true that '80s 35mm photofilm had quality corresponding to 24 megapixels? Somebody told me so today, and I find it surprising.
4
votes
3answers
1k views

What are the advantages/disadvantages of sRAW or mRAW files compared to fullsize RAW?

Are there any non-obvious advantages/disadvantages of setting my 7D to use small or medium RAW instead of large? I seldom print pictures, and the way I take photos the sensor is almost never the ...
11
votes
8answers
70k views

How does 18 megapixels compare to 12 megapixels? [duplicate]

I'm purchasing a digital camera & it says, "Effective pixels: Approx. 18.00 Megapixels". What is this compared to 12.00 megapixels?
13
votes
4answers
4k views

Why are effective pixels greater than the actual resolution?

This page compares Canon EOS 550D and Canon EOS 500D cameras and mentions 18.7 million effective pixels for 550D. However the best resolution possible using this camera is 5184 * 3456 = ...
7
votes
4answers
591 views

Using and earning money images from a 10yr old 5MP camera

My camera is from about 2001 and rather limited by today's standards. 5 megapixel, ISO400 at the most, f/8 is the smallest aperture, noise even in good light, a few hot pixels in the CCD, no raw ...
6
votes
4answers
1k views

Upscale iPhone taken photograph

I have taken a photo with my iPhone which i would love to use a my website background using jQuery to stretch it dynamically. However its obviously a fairly low resolution. Is there anything i can do ...
4
votes
1answer
351 views

Is this article correct about gamma error in picture scaling in common software?

That is kind of a "please proof-read an articles conclusion"-question. Some time ago I found this page: Gamma error in picture scaling. I grasp the point, that the luminosity-curve is not linear and ...
11
votes
8answers
1k views

Which software could I use for periodic bulk image resizing?

I have a very large collection of images in a bunch of nested folders. I would like to run some sort of process (on a regular basis) that will sync all the images to another place in a new smaller ...
8
votes
5answers
458 views

Why does viewfinder spec state 3 times more dots than there are pixels?

My DMC-G2 has a viewfinder spec of 1,440,000 dots, but I read a review that says it is really 480,000 pixels: The electronic viewfinder has an extremely high resolution of 1,440,000 dots (480,000 ...
35
votes
5answers
68k views

Is there a general formula for image size vs. print size?

What size images do I need for common print sizes, such as wallet size, 8x10, and 16x20? Is there a general formula? How could that size change if, for example, a 16x20 was printed on canvas rather ...
14
votes
6answers
4k views

What megapixel value is equivalent to which ISO film?

Is there some kind of equivalency table or formula that expresses what kind of pixels you need in a digital camera to have roughly the same quality as a particular ISO graded film? What other ...