Depth of Field in Aperture-Priority Mode during Dog Photography
Manipulating your depth of field is a fantastic way to home in on specific details of your image and draw the viewer’s eye exactly where you want it—to your dog's expressive eyes or wagging tail.
70mm, 0.4 sec., f/18, 250 70mm, 1/125 sec., f/2.8, 250
Here, you see the same image side by side, but each image tells a very different story. The photo on the left was taken with a very small aperture (f/18) and would likely be described as a woman and her dog enjoying a view of the distant city.
This photo has great depth of field, which keeps the subjects and the distant view all in focus. Equal weight is given to the subjects and the background; neither really stands out from the other.
Conversely, the photo on the right was taken with a very wide aperture (f/2.8) and would likely be described as a woman and her dog bonding. This photo has very shallow depth of field, which keeps the subjects in focus but blurs the view of the city. The effect that your aperture has on your final image is dramatic, to say the least!
When working with a very small aperture, you let in very little light, which may result in you needing an extremely slow shutter speed. The image on the left was photographed using a tripod because it called for such a slow (0.4 second) shutter speed. Because the photo’s subjects were sitting still, a slow shutter speed was okay to use.
Use aperture-priority (AV) mode when you want to make deliberate decisions about the depth of field in your final image. To work in AV mode, simply set the mode dial on your digital SLR to AV. Then you can freely flip through your f-stop settings until you land on the f-stop you want.
The exact dial or button you use to change your f-stop varies from camera to camera, so check your manual if you’re unsure of how to do this.
When working in AV mode and shooting with a shallow depth of field (a smaller f-stop number), try to accurately focus on the exact area that you want in focus because much of the shot consists of bokeh, the purposely out-of-focus areas that are rendered as a soft, creamy blur.
Dogs Glossary
A-B-C assessment
Checking a dog’s airway, breathing, and circulation.
Dogs Glossary
animal shelter
1. An animal control agency run by local government to protect people from animals, take in strays, and manage animal issues and problems within the community. 2. A privately run shelter managed by individuals who want to protect, advocate for, and find homes for animals.
Dogs Glossary
BARF diet
A method of feeding dogs as closely as possible what they would eat in the wild: raw flesh and bones, along with vegetable matter from the stomachs of their prey. The acronym stands for either Bones and Raw Food or Biologically Appropriate Raw Food.
Dogs Glossary
blow out
A twice-yearly shedding of a dog’s undercoat.
Dogs Glossary
blue slip
An application to register a purebred puppy.
Dogs Glossary
breeder
A person who raises, sells, and often shows dogs of a specific breed. Reputable breeders screen parent dogs in an effort to produce healthy dogs that conform to breed standards.
Dogs Glossary
castrate
The removal of a male dog’s testicles to render him infertile.
Dogs Glossary
clicker
A small hand-held device that makes a sharp cracking sound when pressed. Paired with a food reward, an effective dog-training tool.
Dogs Glossary
cohesive bandage
A stretchy wrap that clings to itself used to cover and secure gauze bandages without tape.
Dogs Glossary
come into season
The advent of a female dog’s term of fertility.
Dogs Glossary
dead ring
The stationary ring on a training collar that pulls on the collar, not the dog’s neck.
Dogs Glossary
double coat
Two layers of fur — a top coat of stiff guard hairs and an undercoat that serves as insulation.
Dogs Glossary
dropped ears
The term for hanging or drooping dog ears.
Dogs Glossary
Elizabethan collar
A wide, cone-shaped plastic or cardboard collar that prevents a dog from being able to scratch her head. Used to prevent further injury or hasten healing.
Dogs Glossary
euthanize; put to sleep
To kill an animal to relieve suffering.
Dogs Glossary
fall
Hair that extends over a dog’s eyes.
Dogs Glossary
feathering
Long hair that runs from armpit to paw on the backs of a dog’s legs.
Dogs Glossary
free-feeding
Keeping a constant supply of dog food available so that the dog can decide when and how much to eat. It works best in single-dog households where there’s no competition for food.
Dogs Glossary
heartworms
Parasites that live in dogs’ hearts and cause heart failure. They’re transferred through mosquito bites.
Dogs Glossary
heat
The period when a female dog is fertile.
Dogs Glossary
heel
A command and position in which a dog walks at your left side staying with you as you change direction or pace.
Dogs Glossary
hip dysplasia
A painful malformation of a dog’s hip socket. Some breeds are genetically predisposed to the condition.
Dogs Glossary
hot spot
A localized area of skin infection. It’s usually round, red, and warm to the touch.
Dogs Glossary
live ring
The floating ring of a training collar. Attach a leash to this ring for training purposes.
Dogs Glossary
neuter
A general term to describe either spaying or castrating a dog to render it infertile. Neutering and castrating are often used interchangeably.
Dogs Glossary
pantaloons
The tufts of hair on the backs of a long-haired dogs legs that make him look like he’s wearing bloomers.
Dogs Glossary
pedigree
A diagram of a dog’s ancestors for three or more generations that lists the registered names of the dogs and the titles they earned.
Dogs Glossary
pinch collar
A training collar with interlocking prongs that pinch a dog’s neck when tugged on. Some veterinarians recommend them above all other collars for training purposes.
Dogs Glossary
praise
A verbal reward for a dog , such as an enthusiastic “good dog!”
Dogs Glossary
prong collar
A training collar with interlocking prongs that pinch a dog’s neck when tugged on. Some veterinarians recommend them above all other collars for training purposes.
Dogs Glossary
pulse
Normal dog pulse is between 70 and 120 beats per minute. The pulse of a puppy ranges from 120 to 160 beats per minute.
Dogs Glossary
puppy mill
A place that supplies puppies to pet stores, usually without screening for possible genetic defects or properly socializing the puppies.
Dogs Glossary
registration certificate
The paper certifying a dog’s registration with an accredited organization.
Dogs Glossary
registration slip
An application to register a purebred puppy.
Dogs Glossary
release word
A word that lets a dog know that she is free to move.
Dogs Glossary
rescue group
A network of animal lovers who rescue and find new homes for their favorite breeds or animals.
Dogs Glossary
reward
To give a dog a treat for a correct response while he’s still in the desired position.
Dogs Glossary
ruff
The long, thick fur around a dog’s chest, shoulders, and neck.
Dogs Glossary
separation anxiety
A condition in which your dog becomes anxious and stressed when you leave him.
Dogs Glossary
shed
A twice-yearly process of casting off the undercoat in a double-coated dog.
Dogs Glossary
single coat
A single layer of hairs that comprises a dog’s fur.
Dogs Glossary
spay
To remove of both the uterus and the ovaries of a dog to render her infertile.
Dogs Glossary
stripping
Plucking the dead hairs from a dog’s coat.
Dogs Glossary
titer tests
Tests that check a dog’s immunity levels to determine exactly which vaccinations are needed.
Dogs Glossary
top coat
The top layer of a double-coated dog composed of stiff guard hairs that tend to be naturally water-repellant. The top coat protects the dog’s skin and undercoat.
Dogs Glossary
training collar
A collar that enables you to guide your dog and to check her as necessary — a brief, sharp tug tightens the collar around the dog’s neck.
Dogs Glossary
treat cup
A plastic container filled with small treats or dog food. Shake it and give treats from it as a reward as you train a dog.
Dogs Glossary
undercoat
Fleecy or downy fur shorter than the top layer of a double-coated dog. The undercoat serves as insulation.
