Eos 7d Autofocus Problem
Canon EOS Lens rattles when shaken?
I have a Canon EOS 7D and with it came a lens that is an EFS 18-135mm. I got this lens about 1.5 years ago and it has never been a problem before. But now, when the lens is given a little shake you can hear a loose part inside rattling. The autofocus also gets stuck sometimes when I am trying to take a picture and I just have to give it a little shake to move the loose part and it functions fine. I am going to take it in to a Canon shop for repair but I have recently bought a EFS 55-250mm lens which also rattles although I am not sure if the autofocus gets stuck at all on this one. I am wondering whether this is supposed to happen or should I take this new lens back to the store. What do you think?
indeed, thats not supposed to happen. I am going to say that it is a rare coincidence that you now have two rattling canon lenses
Eos 7d Autofocus Problem
The good thing about bird photography is that it can happen anywhere on our beautiful planet. The thing is not very nice, is that birds are small or shy, and you should be able come close enough to your computer. In this article we will examine the ideal equipment for bird photography. We will also have a brief explanation of how to operate this equipment.
body camera
We live in the world of digital photography, and, therefore, can not be discussed digital camera bodies. I'm also a big fan of Canon, so I will talk Canon, and you can translate to other manufacturers if necessary.
You will need a decent housing allows you to define the image blurry shot continuous RAW image quality. The cheapest body allowing you to Canon EOS 20D it is. However, it is really cheap. The reason it is not affordable is that it is actually a very good set the body of the camera serious amateur or professional. You can not go wrong with this body …
Lentils
Many fans believe that a decent really long zoom will solve all their problems. I was a child there, and it is not. Do what professionals do and get the First long lens.
I used the Canon EF 100-400mm f/4.5-5.6L IS USM for a long time and my results were decent but not enough. This is not the strongest lens. If you need to use zoom and do not continue with the Canon EF 200mm IS USM 70-f/2.8L. It is razor sharp.
I use the Canon EF 500mm f/4L IS USM and is the best thing that could happen to my photography. He is very strong and very fast at the same time. A little heavy sometimes, but I need the exercise! To this end, most use a Canon 1.4x II Extender for a focal length of 1120 mm with autofocus! It's a lot for a bird, and I can not imagine getting a lot of pictures of birds with some good runs.
Incidentally, do not use manual focus. Today, the cameras have not been built for manual focus as the viewfinders are small and do can not see enough detail for effective manual focusing.
Photographing flying birds
Well, now you have all the equipment and goes on the ground to get this award-winning photograph of a flock of birds. You need enough light to enter lens in a shutter speed fast enough to freeze the action. We also want your camera to focus where the bird is in that split second will give before pulling away. So what to do …?
Set your camera to 400 ISO speed. In the sun, which should be enough fast. The reason for not using ISO 100 or 200, is that you photograph the action and do not want to blur.
You must also ensure that its objective is open to fully open. Canon EF 500mm f/4L IS USM A with a Canon 1.4x Extender II offers a maximum aperture of 5.6, and that is what I use when shooting birds in flight.
In addition, make sure your camera is set to continuous autofocus. Canon calls this establishment AI Servo focus. This is essential and Main reason I'm not a fan of camera bodies like the Canon EOS 350D. They will not let you use this approach with the raw images … With Canon?
I also set my image stabilizer to Mode 2 for photographing subjects in motion, to avoid actually working against that sharp picture, rather than for it …
Now all that remains is moving around this heavy lens while birds fly. Good shooting!
Conclusion
Professionals have a way to give the impression that some did not need a computer good to be a good photographer. Is the total absence of meaning. Get decent team and see why the pros get vaccinated and no.
The other thing that makes professional much more than the average amateur is patience. Go sit somewhere where there are birds, forcing yourself to not move for three hours, and you get the magic shots. Your patience will be rewarded.
Dries Cronje is a freelance nature photographer operating in Southern Africa. He has a passion for teaching and has dedicated one of his sites, http://www.africa-nature-photography.com, purely to helping his fellow nature photographers.
15-85 on EOS 7D (Taken on iPhone 4)