Napioa - Wind Origins

Napioa - Wind Origins
by octopus                

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  • 0 posts edited
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  • 112 votes cast
Apr
8
comment Are mobile phone camera lenses good enough to support 20MP sensors?
Not being able to distinguish 1-pixel lines might not be the fault of the lens - the Bayer filter puts a limit on resolution too.
Mar
24
comment Does F number stay the same between 35mm and Medium Format?
@MichaelClark the diagonal looks closer to 5/4 than 4/3 to me. It seems insignificant, but it's still a 2/3 or 3/4 stop improvement. Not quite the improvement you usually get from jumping from one format to the next, so I could see the argument going either way. I say this as a big fan of Pentax.
Mar
20
comment When should I use my display's native gamma over the standard 2.2?
@PinhollowEuri what do you think color managed output uses for a gamma standard?
Mar
16
comment White balance math for white, black, and grey color cards
It would be better if you could get the RAW data from the camera. The processed output has already had a tone curve applied.
Mar
16
comment When should I use my display's native gamma over the standard 2.2?
@user124853 you need to judge for yourself whether more accurate color rendition will be worth the tradeoff of lower color depth. My off-the-cuff answer is yes, but I've never done a rigorous comparison.
Mar
2
comment How can I make it easier to focus with my manual f/1.4 lens without making it worse for slower lenses?
Have you considered that there may be no solutions available other than the ones given in the links? Asking for the impossible usually ends in disappointment.
Feb
8
comment How to convert JPEG to RAW in Photoshop or similar?
@MichaelClark the exception is a Sigma camera with a Foveon sensor, it does capture all 3 channels at each pixel location. I'm sure you already knew but simply neglected to mention it :)
Feb
8
comment Does simply opening and closing a JPEG file decrease image quality?
Carl, I would agree with @JamesSnell that this is an edge case - and I've worked on a popular image editor so I have some experience here. When you open a file, it is copied to an in-memory uncompressed version for editing and the original is immediately discarded. This saves memory and gives you the flexibility to use any file format as a source. I've seen software that can do a lossless flip or rotate of a JPEG, but it's a very specialized function. The program you link to is the only editor I've ever seen that extends this feature to general editing.
Feb
8
comment Does simply opening and closing a JPEG file decrease image quality?
Lots of programs can do lossless rotation, by rotating the DCT blocks without decompressing them thus avoiding the lossy compression step. So you can't say that "saving the file triggers both kinds of compression", even if it's true most of the time.
Jan
5
comment Can in-camera JPEG have image quality advantages over (third party software) converted RAW?
@MichaelClark I don't disagree, but you're arguing a point that's opposite to the question. "Third party software" is even mentioned in the title.
Nov
3
comment Does white balance totally correct color shift due to lens glass or coating?
The phenomenon of colors appearing different under different light is called "metamerism". We're going to see more of that now that incandescent lights are being phased out.
Nov
3
comment Why is FF sharper than crop body for the same framing of the same object?
If a 36,000 line pair chart would be resolved by the FF sensor, then would you also agree that a 24,000 line pair chart would be resolved by the APS-C? And that a 37,000 line pair chart would be too much for both of them? The difference between 36K and 24K is only 1.5, not 2.56 or 2.25. (My APS-C cameras are 1.5 crop, so I'm comfortable using either 1.5X or 1.6X for the math)
Oct
30
comment Why is FF sharper than crop body for the same framing of the same object?
Then I still think you're double counting the same effect. The surface details are getting smaller due to the change in magnification required, your change of framing is simply to match the magnification to the scene.
Oct
30
comment Why is FF sharper than crop body for the same framing of the same object?
Is that just a fancy way of saying the DOF gets larger as you get farther away? Does your logic still hold if you're taking a picture of a flat painting?
Oct
30
comment Why is FF sharper than crop body for the same framing of the same object?
I can see how the greater magnification works out, but how does the greater shooting distance affect sharpness? I don't think it's correct to multiply them together.
Oct
27
comment What factors make a lens brighter?
Everything you say is true. There's another factor though, and that's the accuracy of the lens aperture. Just because you set the camera for F/1.8 doesn't mean that's exactly what you'll get.
Oct
23
comment How to keep burnt-out regions from becoming strongly blue and purple in Rawtherapee?
I'd say it's RT, but double-checking with a different raw processor is how to be sure.
Oct
22
comment How to keep burnt-out regions from becoming strongly blue and purple in Rawtherapee?
Looks like a bug to me.
Oct
22
comment resizing a picture
As I see it there are 3 possibilities: 1. The image was downsized at some point; 2. The image is blurry at any size due to focus problems or whatever; 3. The requirements from the calendar company are too strict, because offset printing doesn't require nearly the detail we expect from photo prints. The proper course of action depends on which it is. Unless the original came from a webcam it should be good enough.
Oct
19
comment What is a low pass filter, and does a camera need to have one?
@Ako most of the time it makes little difference. To see moiré in your image you need to have very fine detail in your scene, and a very sharp lens with perfect focus and the right F-stop and no motion blur. Certainly you can find examples, but it's rare. The ability to get away without a filter goes up as the sensor resolution goes up.