Lenses
For most aviation photographers, the longer the lens the better. Many of us utilize lenses ranging from 70-200mm, 100-400mm, and 150-600mm. Personally, I have been using a Sigma 150-600mm lens for the past three years. It is my tried and true lens that has not done me any wrong. With using a crop sensor camera it is important to know that the ranges in camera are 225-900mm. This is a game changer if you are seeking close up shots at airshows that you otherwise may never achieve.
Camera Settings
Most photographers utilize shutter priority or TV mode (Canon EOS camera systems). I have found that using this setting is important if you are seeking prop blur when you need shutters as low as 1/100-1/160. For jets I usually stick between 1/1250 and 1/1600. This helps achieve a crystal clear image that is crisp. Manual also works if you are familiar with sport photography and know how to change settings frequently.
Best Cameras for Aviation
Aviation photographers want cameras that have high frames per second rates. However, it is okay to utilize any camera you have or can afford. It is important that you stick the camera on continuous focus mode for the frames though. Single frame does not work in aviation.
Recommended Cameras:
Canon R3
Canon R7
Canon R8
Canon R
Canon T7 (this is actually what I use most of the time)