It's a bird

by Vian Esterhuizen

submit your photo


Hall of Fame
View past winners from this year

Please participate in Meta
and help us grow.

quantifies how much detail an image can convey

learn more… | top users | synonyms

1
vote
5answers
327 views

“10 m resolution” - Expressed as screen resolution (or other way photography noob can understand)?

The X-Sat satellite captures images of Earth "with a 10 m resolution multispectral (three spectral bands in the visible and near infrared spectrum) instrument". What does this mean? Particularly, how ...
1
vote
2answers
472 views

is a camera sensor size cropped according to the change in pixel aspect ratio of a resolution?

As an example, canon 6d full frame has the highest resolution of 5472 x 3648 with a pixel aspect ratio of 3:2 . As this is the highest I assume this is utilising the full size of the sensor. If the ...
0
votes
1answer
269 views

What is the best way to resize a high-DPI image for use on the web and in mobile apps? [duplicate]

I've been given an image (I'm guessing straight from a camera) and it's currently at at 240 pixels per inch. It's been a while since I did much Photoshop; I have three questions for two requirements: ...
3
votes
0answers
49 views

increase resolution by taking several pictures - is it done? [duplicate]

What if I took two or more picture of the subject quickly one after another, then used these images to increase resolution? It seems to me that if I take two pictures of the same thing, then my ...
15
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 ...
5
votes
3answers
1k views

Can film be considered to have infinite resolution as opposed to digital sensors? [duplicate]

Camera sensors have an specific number of cells,and their resolution depends on this amount of cells. But film does not have this "units" of sensible material; So, does the size of the particles of ...
0
votes
3answers
121 views

Increase photo resolution by taking a high-res photo of the photo?

I want to make a big tile mural (6 ft. x 3 ft.) from a photo that is 2' x 1.5', 300 dpi. Can I get a higher resolution in the end result if I take a picture of the stock photo with my Canon DSLR, ...
9
votes
6answers
46k 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 ...
0
votes
3answers
289 views

Perfect image quality for 7 foot ultra-hd screens, using PPI to cheat. Photoshop, help!

I am receiving images from clients at 300ppi that need to appear on ultra-HD screens. These images are the wrong dimensions (too small). I'm wondering if i can scale them up somehow to (without ...
0
votes
1answer
945 views

How can I compare MTF50 to a manufacturer's MTF chart?

Currently working with a trial-copy of QuickMTF (Imatest's software kept crashing on me), and I'm trying to get some basic MTF readings for my Canon 85 f/1.8 lens on a 6D. My first set of test shots ...
2
votes
0answers
88 views

Help with calculating resolving power [closed]

I have liked your responses to the MTF questions and wondered if you could help me clear up an issue I have encountered. I have a Canon 7D with an assortment of EF and EF-S lenses. The current issue ...
4
votes
3answers
578 views

Is the megapixel count setting on a P&S digital camera real or a gimmick? [duplicate]

Does downsizing the effective recording megapixel count setting on my P&S digital camera actually decrease the sensor-megapixel density, thereby increasing pixel size and culminating in better ...
0
votes
1answer
455 views

What's a good size/resolution for picture proofing?

What's a good size/resolution when showing pictures to client using a online tool for proofing ? I've noticed that 1350x900 and 72ppi is pretty good, considering image quality and size on disk. ...
1
vote
3answers
162 views

Is this rather high resolution possible to achieve?

I'm looking to make a sticker with wood texture printed on it for a cable concealer of 1 meter. From my calculations, this requires a digital image with a DPI of 300 and a resolution of ...
23
votes
5answers
4k views

Is there any practical difference between saving at 300ppi or 72ppi?

I often see statements in discussions about web displayed image quality that go something like this: "I only upload pictures at 72 dpi and 1200 pixels on the long edge, so if someone copies and prints ...
0
votes
1answer
220 views

Can a image have different XResolution and YResolution?

In EXIF data I see stuff like XResolution = 72 YResolution = 72 I'm trying to display that on a site, and I was wondering if I should display both or just a single "72dpi" ? Are there any cases ...
1
vote
2answers
321 views

What would look better - reduce the size of image and print with lower DPI or increase the DPI instead?

I'll give an example, to make my question a bit more clear. If I have e 12Mpx camera (D700, always shooting in raw format), the highest possible resolution is 4256 × 2832. Obviously, in most cases, ...
7
votes
1answer
640 views

Comparing 1:1 zoom on a 27“ screen at 2560 x 1440 vs 22” screen at 1680 x 1050

When using Adobe Photoshop or Lightroom for example, and zooming the photo at 1:1 ratio, when you work on a 22" screen at 1680 x 1050, there is an great inside zoom. On such a screen the pixel are ...
1
vote
0answers
217 views

Why does our Canon PowerShot A1400 keep resetting to “L” resolution?

We have three Canon PowerShot A1400 cameras. Resolution on all of them has been set to S. Two of them hold this, but the third one resets itself to L every time we turn the camera off and on again. ...
2
votes
3answers
1k views

Camera/Still Resolution vs Video Resolution

Why do high resolution cameras shoot stills at high resolutions, but only typically shoot video at 1080p which is about 2 megapixels? For example I have a Sony-NEX 6 which can shoot stills at 16 ...
1
vote
3answers
293 views

Substitute Samsung Note 3 Cam for SLR for Product Shots for eCommerce?

I'm wondering if instead of purchasing a SLR, if I can't just use my Samsung Galaxy Note 3 camera instead. This is for eCommerce photos; women's clothing, tops and bottoms namely and some jewelry. ...
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
4answers
617 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 ...
2
votes
2answers
558 views

How does sensor size relate to image resolution?

How is it possible that with a particular sized sensor (say APS-C) it is possible to get different sized image cameras (by this I mean a 10 megapixel camera, a 15 megapixel camera etc)? Where does ...
6
votes
1answer
43k views

How can I upscale a low-res image to make it appear higher-res?

I want to enlarge an image to a bigger size. This will cause pixelation. So I want to apply some treatment to it in Photoshop that will suppress some of this pixelation. Of course I cannot generate ...
1
vote
2answers
224 views

Oversampling: Worth it, and will it improve low-light? [duplicate]

I own a 10.2MP Sony A230, and I like to take it with me to important family and friends events... I rarely print my photos, and even then never more than around A4 size, they generally end up on ...
3
votes
3answers
449 views

How are very high resolution images displayed on low resolution monitors?

How is an image with resolution larger than the monitor resolution displayed? How are the extra pixels handled?
1
vote
0answers
45 views

LED HD TV as a monitor for post processing purpose [duplicate]

Can I use a 47" 3d led hd tv with my pc to post process my photos? I am not sure how the quality will be on such a big screen photo being of some 4900x3600 approx.
6
votes
3answers
573 views

Why is resolution more important for landscape photography?

I have heard countless times that "resolution is of utmost importance for landscape photography". This also comes up often when landscape photographers look to medium format for it's detail and ...
3
votes
2answers
220 views

What changes (specifically improvements) occur to image quality when you reduce the resolution in post?

If you shoot a lot of megapixels, let's say 21MP, what image improvements/changes will occur when you downsample the image to a resolution around 1920x1080 for display on a normal 1080p HD television? ...
5
votes
5answers
10k views

What are my options for an FX wide-angle prime to suit the D800's successor? [closed]

I have a D700 which I'm not planning to replace at this point in Nikon's product cycle. I'll porbably buy the D800's successor. Not because I don't like the D800 (especially its usability ...
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 ...
-2
votes
1answer
329 views

What is the best camera to get that will give you a very nice photo on canvas print of 11 x 15 or larger? [duplicate]

I have tried several times to order a canvas print and it always comes back that the picture submitted will not work with the 11 x 15 canvas print and even an 8 X 10 wont work? I have a cannon E ( ...
1
vote
2answers
15k views

What is the optimal resolution required of a picture to print on an A1 size canvas?

I am working on a poster in which the background is a photo that I took myself (18 MP). I am wondering what would be the best resolution for printing this photo on an A1 canvas. This might sound very ...
0
votes
2answers
378 views

What is the resolution of a good compact camera in lines resolved?

After doing some internet research myself to answer this question, I finally wind up asking here. Compact cameras have similar "megapixels" than decent dSLRs, but way lower sensor sizes and certainly ...
5
votes
3answers
628 views

For MTF, why does 10 represent contrast while 30 represent resolution?

I'm trying to learn to read MTF charts. Everything is making sense to me, except why most explanations of MTF will refer to the 10 l/mm line as a measure of contrast while referring to the 30 l/mm ...
7
votes
5answers
47k views

What is a suitable image resolution for canvas prints?

I would like to create a 60 inch x 20 inch canvas print using an image with a resolution of 4759x1798 (240 pixels per inch) and I would like to know if the image quality will still be good at that ...
0
votes
2answers
576 views

Best dpi for printing a 48x18 inch at 200%?

I have an image in photoshop I want to print at 200%, and right now it's 48x18 inches, and the resolution is 72 dpi. I read somewhere that changing it to 600dpi would allow me to scale it by 200% at ...
1
vote
1answer
196 views

Optimal JPGs resolution out of a Point & Shoot camera for storage size and quality? [duplicate]

Simple point & shoots don't produce RAWs, they produce JPGs. Let's assume you have a modern P&S which shoots 16 megapixels maximum in Super Fine, Fine and Normal JPGs. First side question is ...
6
votes
3answers
3k views

Image quality when using the same lens on 16Mpix vs 24Mpix

I'm considering buying a new camera and my two candidates are Nikon D7000 and Nikon D7100. I heard that 24Mpix sensor needs very good lens to produce sharp images. Considering that I currently have ...
1
vote
2answers
597 views

Canon a2300 resolution problem

I have Canon Powershot a2300. It was working fine till yesterday but i dnt know what settings have been changed to reduce the size of the image. Previously images sizes were about 4mb now it is kb's ...
5
votes
2answers
635 views

Do compact and DSLR cameras have the same sensor size if they have the same number of megapixels?

In the analog camera, I understood the impact of using a 35mm film vs using a 70 mm film. However in digital world, I dont know if the sensor size is the same for compact and DSLRs. In other words, ...
2
votes
1answer
389 views

Does increased resolution compensate for diffraction?

Given a sensor size, the diffraction limit (and cut-off) are determined largely (entirely?) by the density of pixels on the sensor. With the trend of ever-increasing megapixel counts, this means that ...
1
vote
2answers
814 views

How to scale down images in Lightroom while maintaining quality?

I am working with a product photographer who is having issues understanding dpi and resolution. She is shooting products to go onto a website using a Canon 5D and an ortery box. I have asked her to ...
0
votes
3answers
553 views

Why won't an online service print 16x20 from an 8 megapixel cell phone photo? [duplicate]

Possible Duplicate: Is there a general formula for image size vs. print size? I have a wonderful photo from my cell phone and several people would like a 16x20 or at the least a 11x14 ...
7
votes
2answers
253 views

What does it mean to excite aliases?

I recently came across the phrase 'excited aliases.' The phrase seems to be related to lens sharpness in some way. While a web search turns up the phrase a few times, I am unable to locate a decent ...
4
votes
3answers
440 views

Shooting images smaller than the sensor size

I have a d600 and I appreciate very much the high resolution I get (useful especially for landscapes), but for most other subjects I find 6000 x 4000 to be overkill, making post-processing ...
0
votes
3answers
243 views

How can a 900X500px image have ~5400 DPI? [duplicate]

Possible Duplicate: Does the dpi number reported by camera in JPG have any meaning? I am investigating on the size and resolution of the photographs posted on the Internet. I have visited ...
6
votes
3answers
394 views

Is a low-resolution scan of B&W negatives expected from a drugstore?

Shoot a roll of ilford color process B&W. Take to Walgreens. Receive CD (and negatives). Import to Aperture, crop a bit, and ask for an 8x10. Get a warning that there's not enough pixels to make a ...
1
vote
4answers
259 views

Low light pixel aggregation

If a lower resolution end image was acceptable, wouldn't it be possible to halve the width and halve the height of a low-light image and take the sum of the light in each block of 2x2 pixels when ...