How to Use a DSLR Camera? | First Shots Made Simple

Most new DSLR owners never open the manual — they just start pressing buttons and hoping. The real process is simpler than it looks, and once you understand the basic flow of powering on, focusing, and shooting, everything else falls into place. Whether you picked up a Nikon D90 or a Canon Rebel, the core steps are nearly identical across brands.

What You Need Before Your First Shot

You need four things in place before the camera will fire: a compatible lens, a charged battery, a memory card, and a fresh start. Official Nikon guidance lists removing the lens cap and turning the camera on as the first shooting steps, so start there.

Insert the battery and SD card before powering on. Both Canon and Nikon setup instructions consistently imply the camera should be off when installing or removing either one, so make that a habit. On first power-up, the camera will ask you to set the language, date, and time — do this now rather than skipping it, because it stamps every photo you take with the correct timestamp.

The Basic Shooting Sequence

Once the camera is on, point it at your subject and press the shutter-release button halfway down. This triggers the autofocus system. Check the viewfinder indicators — when the focus point locks on, you’ll see a confirmation light or beep. Press the button the rest of the way to capture the image.

Focusing is the step most beginners rush. The half-press is not optional; it’s the camera’s way of locking focus and metering the light before the shot. If you press straight through, you’ll often get blurry images because the lens never had time to focus. For most subjects, set the lens to AF rather than MF — Canon’s beginner guidance specifically calls this out, since the MF setting forces manual focusing and leaves beginners confused when nothing locks.

After the shot, review it on the LCD screen using the playback button. If something looks wrong, the fastest fix is usually the camera’s built-in help system rather than guessing. Nikon manuals include on-board help accessible through the menu — press the G button to open menus, use the multi selector to highlight options, and press J to confirm.

Choosing a Shooting Mode

Your camera’s mode dial offers Auto, semi-automatic, and manual options. For your first sessions, set the dial to Auto and let the camera handle exposure decisions. Canon’s beginner guides recommend exactly this — shooting in Auto removes the technical load while you learn framing and composition.

When you’re ready to grow beyond Auto, the three exposure controls to learn are shutter speed, aperture, and ISO. These three settings determine how much light reaches the sensor and how motion and depth appear in your photos. Nikon’s D90 manual treats shutter-speed selection as part of advanced shooting, so don’t rush into manual mode until you understand what each control does.

Mounting Lenses and Avoiding Common Mistakes

To attach a lens, align the index mark on the lens with the matching mark on the camera body, then rotate until it locks with a click. To remove it, press the lens release button and rotate the lens counter-clockwise. Never force either motion — if it doesn’t turn, the marks aren’t aligned.

Four mistakes send new DSLR owners back to Google repeatedly. Forgetting to remove the lens cap produces black frames. Leaving the lens on MF prevents autofocus from engaging. Skipping the battery and card check leaves you with a camera that powers on but won’t shoot. And removing the card or battery while the access lamp is lit can corrupt your files — Nikon warns against this specifically. Wait until the lamp goes out before touching either one.

When you’re ready to explore camera options beyond your current body, our roundup of the best DSLR cameras for photography compares current models across the major brands.