Another way to overcome this issue is to use a webcam. You can set it up and just watch yourself on screen. As soon as you have achieved a decent erection you can either take single shots or a video clip depending on the final result you want, for example, a cum video. Once you are feeling comfortable with your results you could then move onto Skypeing if you wish.

I used to be like this.....I'm no exhibitionist and was naturally shy about showing my full arousal and sexuality in public photos, especially since I was very lacking in sexual confidence due to derogatory comments from a previous female partner.....

Actually taking photos turned out to be a cathartic experience that I found liberating once I 're-programed' my psychology and learned to admire my hardness and functioning masculinity. So, be patient with yourself and just enjoy being erect and aroused in front of the camera until if feels more natural. As Cruiser says, it helps to set up the camera in advance so that there does not need to be much distraction to snap a pic when you get the chance and you will eventually just forget the camera.

Try using a timer on your camera and set it up pointing at your cock. When you get your cock up hard hit the start button and gently stroke your cock to keep it up hard. Take your hand away with 2 seconds to go and tense your cock muscle so your erection cranks up for the last second, then wait for the click. I took some of my own boner pictures like that.