Lieu genois corse : torregiani histoire genoise de la corse. Nodal Point. The Nodal Point The Nodal Point of the lens (or more correctly, the entrance pupil) can be considered as the point at which the rays entering the lens converge. It can also be considered as the centre of perspective of the lens or the apparent pupil. This point can be considered as the Front Nodal Point as the lens also has a Rear Nodal Point and in a simple lens the two nodes converge to a single point.
The term Nodal Point is used here because for decades it has been accepted as the term defining the point where the rays entering the lens apparently converge and has been referred to by this nomenclature in a considerable number of Photogrammetric papers and publications, but let us not let terminology detract from the message. What we are interested in is the directions (or vectors) of the rays entering the lens.
It is important to know the location of this point (entrance pupil) for Photogrammetric purposes. Photogrammetric camera lenses are constructed so as to be 'symmetrical'. Entrance Pupil Database. Wouldn't it be great if everyone entered their values for their NPP / Nodal Point / Entrance Pupil for lens and camera combinations. Some searching on the web will find a lot of people saying they want to start to create a database of some kind, but have not seen anything substantial so far (correct me if I am wrong). Please enter your own values if they are not listed.
Thanks, -- Richard Korff 11:12, 13 May 2005 (EDT) To cater for all the different camera bodies and lenses, the tables have been split into 3 parts: The first table shows the position of the tripod mount in relation to the lens axis. Use as much as possible actual measurements rather than the reading on your panorama head , unless your are sure these are the same. To enter a line for your combination, edit the page by clicking edit at the top of the screen (you may need to create an account or sign-in first), and edit the table below.
Tripod Mount Measurements Entrance Pupil Measurements Number of pics for 360° Related Resources. Manual Exposure Blending With Photoshop. Beginning real estate photographers may wonder what people in the PFRE flickr forum are talking about when the talk about “Exposure Blending”. Is this the same as “Exposure Fusion”? No, it’s not. Exposure Fusion is where you combine a number of bracketed images with an automatic algorithm built into software such as Photomatix, Lightroom/Enfuse or other similar applications. Exposure blending is where you combine several bracketed images manually with layers in Photoshop. Since the images are on different Photoshop layers you have exacting control of how the layers are blended together. This YouTube video by Simon Maxwell, an Architectural photographer working in the UK illustrates how to use exposure blending to carefully control the color balance in an interior shot.
You can also blend images with different exposures as well as different white balances. Exposure blending is something you typically use for project where you have plenty of time for post-processin. Noise Reduction with Smart Object Stack Modes. Last week we took a look at Stack Modes in Photoshop, and found that all we needed was a layered Smart Object, and we could use the Stack Modes to great effect. This week we will continue to look at uses for Smart Object Stack Modes, looking at a very effective technique for removing color noise in photographs. I first saw this demonstrated by Katrin Eismann at Photoshop World some years back, when CS3’s stack modes were first introduced as part of Photoshop “Extended.” You are surely familiar with color noise – the downside of digital photography, which is brought on by either inexpensive sensors or high ISO settings. It appears as a splattering of magenta and green spots throughout your image, particularly in the shadows, and brightening the shadows always seems to bring the color noise out even worse.
For example, here is an image taken at ISO 3200: Not so bad, you think? See the purple and green “spattering” going on? For this example, we’ll start in Adobe Photoshop Lightroom. Image Stacking Noise Reduction Technique. Hello PentaxWorld,The other day I decided to try a trick that I read about in one of my Photoshop manuals (Adobe Photoshop CS3 for Photographers by Martin Evening). Even though I have moved onto CS5 it is still one of my favourite Photoshop guides, possibly due to the quality of Martin Evenings efforts.In the manual he discussed some of the many benefits of Photostacking. In a previous thread in this board Manesty discussed Photostacking to achieve combined focus properties through a series of individual images to produce a single image that offered a depth of focus greater than possible from a single image.I would like to offer another use for Photostacking.
Photostacking can be used to reduce the effects of noise. The technique is based on the fact that noise generated by high ISO is not always created the same for each photo. The second photo is a stack made up of 5 photos / captures. Bret Edge Photography » Ten Killer Exposure Blending Tutorials. Delta Pool, Utah Back when I shot Velvia I extended the very limited dynamic range of that beautiful but contrasty film by using graduated neutral density filters. The digital revolution has all but eliminated GND’s from the backpacks of many landscape photographers. I use to carry three of them. I now carry only one, a Singh-Ray 3 stop soft-sep GND. Why? Blending two or more digital exposures together to create a single image with an expanded dynamic range allows much more precision and control over the final image.
If you’re like me, you’re a little bit intimidated at the thought of learning yet another Photoshop technique. Exposure Blending in Photoshop – Sean Duggan This might be the best place to start. The Basics of Exposure Blending – Sean Bagshaw Here’s another excellent primer to get the virgin blender well on their way to exposure blending bliss. Digital Darkroom: Graduated Neutral Density Filter – Jesse Speer In terms of digital wizardry this tutorial from 2004 is ancient. Natural Looking Skin Smoothing Photoshop Tutorial | mckenziegraphics. When dealing with skin smoothing in Photoshop it is difficult to find that balance between skin that appears naturally smooth and blemish free and skin that appears unnaturally glossy and fake. This technique I came across while researching techniques for editing photos of bikini models for Hot Bod Bikini Calendar. So far it’s my favorite skin smoothing technique. Step 1: Duplicate your background layer Step 2: On the duplicated layer add a surface blur Filter > Blur > Surface Blur There is no magical formula for this.
Step 3: Create a NEW layer Go to Edit > Fill and fill your new layer with 50% Gray Step 4: Filter > Noise > Add Noise Set it to 3% Select Gaussian Check Monochromatic Step 5: Filter > Blur > Gaussian Blur Set to 1 pixel Step 6: Set your Gray filled layer to Hard Light Layer Style > Blending Options > General Blending > Blend Mode: Hard Light Step 7: Create a Group and put your Gray filled Layer and your Duplicated Background Layer in it. Step 8: Step 9: Like this: Like Loading... Blog Archive » How to smooth skin in Photoshop. Retouching skin is rarely an easy task. There are no absolutes when it comes to making skin look the “right” color, smoothing out wrinkles, or reducing blemishes and blotchiness. This tip will take you through one popular technique for smoothing skin texture for a younger, smoother look. Step 1: Duplicate the background onto a new layer. Anyone who as taken one of Jason Hoppe’s Photoshop retouching classes knows he is a strong advocate for non-destructive retouching techniques.
As usual, we’ll preserve the original photo by duplicating the background image onto a new layer. Simply drag the thumbnail in the Layers palette to the New Layer icon. Step 2: Apply the Surface Blur filter. The Surface Blur filter was introduced in Photoshop CS2. Choose Filter > Blur > Surface Blur Blur the new layer to the point where the skin imperfections are no longer noticeable, but no further than that. Step 3: Add a Layer Mask. This is one quick way to create smoother, younger, skin in Photoshop. Smooth Skin.