When you've just bought your first DSLR, the wealth of accessories can be downright confusing. A rule of thumb is to invest only in those that serve your purpose and desired photography style. To make this selection easier for you, here is a basic guide to the main components you should consider:
You may not have expected it, but backup batteries are a must-have; here is why: you'll be surprised how quickly you can go through one charge when you're grasping the basics of photographing with your new camera. You'll take long to learn how it works and calibrate it for each photo, with the battery on for all this time.
An off-camera flash
The built-in flash does more harm than good to your photos. Better picture quality is achieved through an external, better performing flash. Note that this will require even more battery power, so be prepared. You can add a smart versatile camera trigger .
Be it wired or wireless, a shutter release is what helps you take a photo when you can't actually touch the camera - e.g. when you are in the picture too, but also when you're shooting macros (close-ups) or long exposure scenes. By releasing the shutter remotely you avoid vibrations or moves that would ruin the result.
It's hard to avoid getting dust, water etc. on the lens, which is why you need something reliable to clean it. A blower is a good specialty tool, but may be a strange thing for a novice user. A lens pen is a much more intuitive tool, with two handy ends - one for brushing and the other for effective cleaning.
This lens accessory helps decrease reflections (such as from glass or various shiny surfaces), at the same time making colors look brighter through saturation increases. A lightning trigger is also a best option to add.
White balance cap for lens
This lens cap is a better replacement for the gray card, which helps you, set the correct white balance for every photograph. This will make every picture look the way you want it to.