Napioa - Wind Origins

Napioa - Wind Origins
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13

Focus stacking allows you to create an image with a greater apparent depth of focus (i.e. more of the subject in focus) than would otherwise be possible. This is used in fields like macro photography where you are often working at the limits of the capabilities of the lens.


12

There is a good article over at DPS about focus stacking which documents one way of doing it including post processing in Photoshop.


11

If you are taking photos of something stationary, then a focusing rail will allow you to do them perfectly. If you are talking about moving things, like insects, then all you can do is take a lot of photos. If you aren't able to focus reliably without a tripod and rail, then you can use burst mode. But, with some practice, you can get to the point where ...


7

Always use as much data as you can. It's actually easier to reduce noise when there's more information to begin with. (Reducing resolution is a brute-force noise removal tool, throwing away both noise and signal.) If you're still concerned about the size final image, reduce the resolution at that point, after flattening.


7

There is a good article about focus stacking using command line tools align_image_stack and enfuse (both included in Hugin).


6

You can also use the hugin toolset which includes the align_image_stack and enfuse tools. You may also wish to add the EnfuseGUI to cut down on the typing. Works very well Free & Open Source Multi-platform runs on Mac/Windows/Linux There is a very nice walk through here.


5

Use focus stacking. Why would a photographer do focus stacking? What are the best practices for DOF stacking? What software is available for macro focus stacking? What are the disadvantages of focus stacking?


5

I believe you are looking for something like Helicon Focus. I've heard from reliable sources that stacking can also be done manually in Photoshop CS 5, but I haven't done it myself.


4

In Photoshop CS5 or later, load your images into layers. Select Edit > Auto Align Layers (at macro distances even on a tripod small changes in focus will alter the perspective of each shot) Select Edit > Auto Blend Layers. This will select the sharpest parts of each layer and create a mask. The masks can be quite complex, but it does a very good job. ...


4

A macro lens' maximum magnification can only be achieved at minimum focus. So to get maximum magnification you must move the camera towards or away from the subject to focus a specific area of it. That is the main advantage of using a focus rail. In the case of stacking images, though, maximum magnification in every frame is probably of secondary ...


3

EDIT: Originally I misread your question to only mean increase in resolution. I do not know of any term that encompasses that an HDR but these two cover quite a bit: Super-Resolution, although it covers multiple techniques. This term has been used by camera manufacturers to describe techniques where they create a higher-resolution or increase color-depth ...


3

As far as I've seen on their website, Kessler Second Shooter does not provide any focus control mechanism, therefore you would have to improvise. First option, workaround with the device itself: Set the lens on manual focus, move the camera on the slides using the Second Shooter's motor controls in small steps (here you need to check what's the smallest ...


3

An alternative to focus stacking is to tilt the plane of focus so that it is parallel to the object you are trying to photograph. Usually the plane of sharpest focus is parallel to the film/sensor plane of the camera, however by tilting the lens relative to the camera the plane of focus can be tilted so that it is aligned with the longest axis of your ...


3

A friend of mine recommended ImageJ in combination with the Stack Focuser plugin for combining the images into a single image with an extended depth of field. He mainly uses it for microscope images. I've also found good references for CombineZP. Although there's not much info on the site there is a yahoo user group for it for more information and this ...


3

IMO focus stacking isn't very useful for landscape photography, it's more useful in macro photography, but for landscapes there are better ways to get good focus. check out this online depth of field calculator to get an idea about DOF in different settings. Anyways, about your question, I must say it's possible to get a good result in focus stacking if you ...


3

You are right about the disadvantages of focus stacking, also, the process of taking pictures for focus stacking (taking multiple pictures at different focus ring positions and getting every bit of the picture sharp in at least one picture) can be a bit technically challenging. That is why traditionally landscape photographers solve this issue by using a ...


3

If you're looking for a grouping term, I don't think there is one that's used widespread or consistently, but personally I sometimes use stacking to cover these types of techniques. I just wish there were a term that could also include panorama stitching, since the main logic behind nearly all of these types of algorithms is similar--vary one specific ...


2

Another disadvantage not mentioned before is: Focus stacking takes a lot of time, in particular in the postprocessing phase. This is a multi-step process, (comprising at least align+stack). You need to get familiar with special-purpose software, and there are countless ways to try different parameter settings at the PC. Tiniest erros add up and must be ...


2

The only way to counteract focus breathing directly is to buy a lens that doesn't breath. The other option is to move the camera as a whole closer and further from the subject. This will image the entire object at the same magnification with enough shots, but you will run into perspective issues.


2

A lot would depend on whether you need continuous focus through the scene or have more discrete points of interest. A micrometer (geared) rail can make it very fast and easy to make sure that you have complete coverage of the depth of a scene with greater precision than manual focus simply because the adjusting mechanism is finer and the scale is linear. ...


2

My own experience with doing similar things would suggests that you should take all the pictures you need to take in one go using a using a tripod (note that tripods are cheap). The workflow for the projects I've done looks as follows. You take pictures with a tripod and remote control at the lowest ISO setting available. You should use manual focus and ...


2

I just increased the DOF from 3.2 to 8 and all the halo just went away. Please note I did play around with increasing the radius setting but that didn't make a difference.


2

I found what I believe is the answer I was looking for, which is "epsilon photography". Quoting from Wikipedia: Epsilon photography is a form of computational photography wherein multiple images are captured with slightly varying camera parameters (each image varying the parameter by a small amount ε, hence the name) such as aperture, exposure, ...


1

I don't think that there's a specific term for that in photography. A term to describe the idea of combining information of many images into one in general could be superposition.


1

A lot depends on the focus distance. The same amount of focusing ring movement at a very close focusing distance will move the point of focus a LOT less than the same amount of focus ring movement at a far focusing distance. And when you move from one lens to another all bets are off, especially if you are measuring the movement of the zoom ring in inches ...


1

Unfortunately Sony does not give external software access to the focusing. That´s why none of the available software solutions like Helicon Remote supports Sony Cameras. One option to get stacks that you can combine using a software like Helicon or Zerene Stacker would be a hardware solution for the focus shift. Instead of using external software to move ...


1

You are simply making the wrong assumptions. Just "playing around" and thinking you see a correlation doesn't mean that it actually exists. You've just fixed the sensor format at APS-C, aperture at f/22 and tried varying the focal length and subject distance a bit and thought that you saw a correlation. However if you try these settings for example: f/2.8, ...


1

As I know, depth of field is not exactly the same in front of and behind focus plane. One third of area in focus is in front of focused point and two thirds are behind this plane. So if you want to have whole your object in focus, you should focus to some point which is approximately in one third of depth of object. Especially when you don't have closer ...


1

I don't have too much to add, but I have some limited experience with focus stacking on microscopes that I can share. I've done focus stacking on an SEM, the following image is a stack of only two images. I wish I had a third to fill in the blur in the middle. Image of a flower I took with a scanning electron microscope. The near foreground and the 'sky' ...



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