Showing posts with label depth of field. Show all posts
Showing posts with label depth of field. Show all posts

Monday, January 30, 2017

New iPhone 7 Plus Portrait Mode

Back in the fall of 2016 when Apple announced the iPhone 7 and 7 Plus they also talked about a new camera mode for the iPhone 7 Plus only, called Depth of Field Portrait Mode.

Using this new mode on the 7 Plus’ camera, you can shoot a portrait and have the great “bokeh” effect for the background while the subject is in sharp focus. At the time it was mentioned that the new mode would only work when the iPhone’s camera recognized a face, so it would only be useful for human portraits. I am happy to say that now that Apple has actually released this feature via software update that it actually works quite well even on objects.

Tiki character shot with Depth of Field Effect on iPhone 7 Plus

This past weekend I went out shooting with my photography club and I decided to try out this new Depth of Field Effect mode on my iPhone 7 Plus. During our photowalk we went to Constitution Lakes Park in Dekalb County, Ga. A man that did volunteer work at this park found a pit full of trash and decided to start using the trash to make art.

One of his pieces is a Tiki character attached to a fallen tree and when I spotted it, I thought it would be an interesting subject to test the new portrait mode on the iPhone 7 Plus camera system. As you can see in my attached photo, the new mode does work quite well even though my subject is not an actual person.

Fire Hydrant shot with the Depth of Field Effect in Sparta, Ga
 On Sunday I was out shooting for my Forgotten Pieces of Georgia series and stopped in Sparta, Ga to shoot some video of this small town which is turning into a ghost town. Before filming, I spotted a rusty old fire hydrant and decided to test the iPhone 7 Plus camera again and again it worked quite well with the bokeh effect.

Last weekend I was also visiting the family of my girlfriend Janice and while there, I used my iPhone 7 Plus to snap a photo of their hummingbird feeder using the new portrait mode.

Hummingbird feeder shot on iPhone 7 Plus
 If you have an iPhone 7 Plus, I encourage you to give it a try and see what kind of images you can create. It cannot replace your DSLR, but you can make some interesting images with this new tool in your bag.

Comments/Questions

Sunday, October 16, 2016

Light Field Photography

This week I wanted to write about a new style of photography that I have recently started playing with, called Light Field photography.

A light field camera, also known as a plenoptic camera, captures information about the light field emanating from a scene; that is, the intensity of light in a scene, and also the direction that the light rays are traveling in space. This contrasts with a conventional camera, which records only light intensity.


In this image, the focus is on the mailbox.
The first light field camera was proposed by Gabriel Lippman in 1908, and he called his concept “integral photography”. Lippmann's experimental results included crude integral photographs made by using a plastic sheet embossed with a regular array of microlenses, or by partially embedding very small glass beads, closely packed in a random pattern, into the surface of the photographic emulsion.

In 2004, a team at Stanford University Computer Graphics Laboratory used a 16-megapixel camera with a 90,000-microlens array (meaning that each microlens covers about 175 pixels, and the final resolution is 90 kilopixels) to demonstrate that pictures can be refocused after they are taken.

Lytro Inc. was founded in 2006 by Res Ng, a graduate of Stanford University and inventor of the Lytro Light Field camera line.

In this version of the same shot as above, the focus is on the car.

Features of a light-field camera include:
    1) Variable depth of field and "refocusing": Lytro's "Focus Spread" feature allows the depth of field (depth of focus) of a 2 dimensional representation of a Lytro image to be expanded after a picture has been taken. Instead of having to set the focus at a particular distance, "Focus Spread" allows more of an 2D image to be in focus. In some cases this may be the entire 2D image field. Users also are able to "refocus" 2D images at particular distances for artistic effects. The ILLUM allows the "refocus-able" and "Focus Spreadable" range to be selected using the optical focus and zoom rings on the lens. The ILLUM also features "focus bracketing" to extend the refocusable range by capturing 3 or 5 consecutive images at different depths.
  
    2) Speed: Because there is less need to focus the lens before taking a picture, a light field camera can capture images more quickly than conventional point-and-shoot digital cameras. This is an advantage in sports photography, for example, where many pictures are lost because the cameras auto-focus system cannot be kept pointed precisely at a fast moving subject.
   
    3) Low-light sensitivity: The ability to adjust focus in post-processing allows the use of larger apertures than are feasible on conventional cameras, thus enabling photography in low-light environments.
   
    4) 3D images: Since a plenoptic camera records depth information, stereo images can be constructed in software from a single plenoptic image capture.

Wedding side by side, image from PetaPixel
 I have recently started using a Lytro Illum camera myself and I like the camera a great deal. Is it perfect for every situation, probably not, but one of the nice aspects of the camera is if you are shooting sports, you can shoot faster with the Lytro Illum as you don’t have to worry about whether or not the AF can keep up. Since the images can be re-focused in the camera or Lytro’s Desktop processing software, you can just shoot away at a football game and then put the images in proper focus later. Some wedding photographers have begun to embrace the Lytro camera as they can take one shot of a bride and groom like this sample image and shift the focus from him to her in a single shot and then export both versions for print.

I have had my Lytro Illum for a few weeks now and I can say that the camera is certainly worth a try, I have captured some really fantastic images with it. Is the Lytro Illlum for everyone? Of course not, but if you have the extra $350 to spend and want to take your creativity to the next level, go ahead and give it a try!



Comments/Questions

Sunday, December 13, 2015

Portrait Lenses

Since as a photographer portraits will probably be your bread and butter, this is a question that is asked a lot by photography students, “What lens or lenses are best for portraits?”

As a general rule, we recall people’s feature best from what’s called the 15 feet rule. In the case of facial recognition, when we see a familiar face, our brain is triggered to reconstruct an image of that face and those features as they appear from 15 feet away according to researchers, so,in order to achieve realistic proportions, we need to shoot from around 15 feet from the subject.


Outdoor portrait shot from around 6 feet with my EF 85mm F/1.8

So, what is the optimum portrait lens? Well it depends on how much of a person you are shooting and show much you want showing. If you want the whole person standing, then you would use a 50-70mm lens, if they sit down then a 50-105mm would work great. If you want a tight head and shoulders shot, then you’d want at least a 200-300mm lens since you want to still be around 15 feet away. Ever see a professional model shoot on location? The photographer is usually using a fat lens on a monopod like a 300mm F/2.8 or even a 400mm F/2.8.

Now I am not advocating that the 15 feet rule is set in stone, different photographers will shoot from different distances to get the look they want. I will sometime used a 50mm and get closer to the subject, with the 50mm, the distance is around 5 feet with a full frame body like I use and I also love, as many photographers do, to shoot portraits with my 85mm portrait lens and when using that lens I can stand at around 9 feet from the subject and fill the frame nicely.

Environmental portrait of WWII actor shot from around 15 feet with 70-200mm lens at 200mm

Many photographers these days will just use their 70-200mm F/2.8 for all their portrait work, which is why this particular lens is the most popular and the lens that sells the most by any builder. One thing you do want to remember when shooting portraits is to be mindful of the distance you shoot from as when you get closer you can make the subject’s nose bigger and their ears smaller. Shoot from too far away and you make their face flat.

Also remember your depth of field as generally the idea is portraits is to make the background disappear, you want the background to be blurry and out of focus as your subject is the important part of the image in an portrait.



Comments/Questions

Sunday, August 4, 2013

Recent Class Assignment and a Road Trip

Good Morning Everyone and Happy Sunday! Today I am just going to talk about a recent project and school assignment that I had due. On Thursday of this past week I had the pleasure of going on a road trip. I had a class assignment due on Saturday so I chose to go to a different location other than what I normally use. The road trip took me to Baltimore MD and Washington D.C. I had always heard about this great place to shoot called the Graffiti Warehouse located in Baltimore, so that was the first place we headed. I also like to photograph National and Historical Site so for that I headed to Washington D.C.

The assignment for school we had to take portraits using only available light, no strobes or flash. This is something that I do all the time so I wasn't to worried, I used the Graffiti Warehouse for this they had a few rooms with huge windows that gave some amazing light. Below are some of the photos taken yesterday.


 Photos By Wayne Salat
 Photos By Wayne Salat
 Photos By Wayne Salat
Photos By Wayne Salat

For the other personal project, as I had mentioned, I went to Washington D.C. I have never photographed at night so this proved to be a challenge. Photographing some of the monuments during the day also proved to be a challenge as the light was quite strong.  Getting my settings right and putting the knowledge that I had to the test, produced some nice photos. Below are some photos of the U.S Capital Building taken at 10 PM and the others were taken during the day when sun was brightest.


  Photos By Wayne Salat
  Photos By Wayne Salat
  Photos By Wayne Salat
 Photos By Wayne Salat

Enjoy Your Sunday and Photograph Something Everyday!

Sunday Ambassador~ Wayne

Saturday, July 20, 2013

Photographing Nature


Saturday Ambassador

Most photographers develop a preference with regard to genre, style and subject matter which defines their professional existence. However, many choose to experiment in other realms for personal enjoyment, as well. Such explorations can be very educational, as a photographer can assimilate a host of new techniques and approaches into their repertoire. This can engender innovation and inspiration, as well as honing existing skills.
Nature is all around us, even in an urban environment, and is often a good place to start.  You might take a trip to an interesting location, visit the local botanical gardens or zoo, go to a park in your area or spend some time in your own garden. Flowers, rocks, water, storms, sunsets, clouds and insects can contribute to some exquisite natural imagery.
               Summer Storm over Antelope Island, Lake Powell, Utah, Deva Mayorga-Malone, 2013, panoramic composite
 
Photographing nature is an exceptional way to learn to mix artificial light with natural light, capture subjects in motion, expose for a broad dynamic range and develop the patience and eye for detail that are fundamental aspects of the art.
Here are a few suggestions for producing great photographs of the natural world:
§  Perspective: Humans most often view the world from a standing position and, subsequently, look down at things such as flowers and small animals. Consider shooting subjects like these from their level or from below for a unique look.
 
§  Composition: When you are attracted to a scene, you probably stop to photograph it. Don't move on too quickly, however, as your first impression may not be the only or even the most interesting composition. Walk around your subject and study it from various angles. When framing the shot, consider angles (diagonals can add depth to an image), direction of light/shadows, background/foreground, distracting elements, et cetera.
 
§  Lens choice: Selecting the lens best suited to your subject will naturally produce the best images. Consider how close you should be to your subject and how much of the back- and foreground you intend to include and decide accordingly.
 
§  Depth of field: Landscapes often benefit from a narrow aperture, such as f/16. However, a wide aperture like f/4 or lower can separate a subject from the background nicely by creating a background blur.
 
§  Light: As photographers, we are generally attracted to exceptional natural light and endeavor to use it to our advantage. Great subjects do not always reside within that fabulous light, however, or may benefit from the addition of supplementary artificial light. Electronic flash or a reflector can often accentuate a subject or provide fill light where required. Get your flash off the camera by attaching a synch cord or using a flash trigger. The unit can then be held (or mounted atop a light stand) away from the lens axis to light the scene in an attractive manner.
 
§  Details: Don't forget the details! Often, texture or pattern, a reflection or some minute component of the subject may be of interest in itself. It is worth exploring these additional aspects of the subject matter for the artistic potential they hold.
 
             Exquisite Sandstone Formation, Lake Powell, Utah, Deva Mayorga-Malone, 2013, digital photograph

~Saturday Ambassador