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There are a few different philosophies about deleting images. Some people like to delete images that they think are bad so that they don't drown in image glut when they start their postproduction. Other people say you should never delete an image because you never know whether it might be useful or not until later. For the sake of this discussion, let's split the difference and say that there will occasionally be images that you know will have zero utility later, those images were your fingers in front of the camera or you left the lens cap on or something like that. Your camera provides a number of ways to delete images, as well as to lock images so that they can't be deleted.
To delete an image I first need to go into Playback mode and find the image I don't like. Yeah, I can't stand this image. So, to delete it I would simply press the Trashcan button here. That asks me to confirm. Pressing the Trashcan button again is Yes. It's not the OK button; it's the Trashcan again. So let's press it again and it's gone. If I have a bunch of images to get rid of, this is going to take a while because I've got to scroll around. Well, that's completely garbage. Let's get rid of that, okay. Anyway, I would have to scroll around and find all of those images.
There's another way to do this which is to go into my menu, and in my Playback menu the very first item is Delete. Now this gives me the option to Delete All, to erase the entire card. You don't ever want to do this. As we've discussed at length before, rather than using Delete All you want to use the Format command. It will make your card much more reliable over the long haul. That said, the Delete command is still useful, thanks to the Selected option here. If I choose this, it thinks for a minute and then it gives me this thumbnail view, and this lets me scroll through and simply mark images for deleting. So I find one I want to get rid of, I press the center button, and you can see a little Trashcan icon appear here.
So I'm going to go through here and mark a bunch of images. Let's scroll up a couple of times to get a better view. So I can move around here and find a bunch of images that I don't like. When I have chosen all the images that I want to delete, I hit the OK button. Note that I can also zoom in if I want to. If you're not sure if that's really the one you're aiming for, you can zoom in and get a closer look, and then hit the OK button. It ask me to confirm whether I want to delete these 8 images. I'm going to say OK and now those are gone. Now, there's another use for the Delete function.
Perhaps this has happened to you. You shoot all day long, you take hundreds of images, you go, you dump them into your computer. You forget to delete the card. You come out the next morning, you put the card in your camera, you shoot 20 shots and then realize, oh no, I've still got those 200 pictures that I took yesterday plus the 20 new ones. So now you don't have as much space on your card. When you get home and dump the card, you're going to have a bunch of duplicates. So you might think, oh boy, now I have to go in with Delete selected command here and delete those 200 images. That's going to take forever.
There's actually another way you can do this that's a little bit easier. Rather than choosing to delete 200 images, you can choose to save the 20 that you just shot. So I'm going to go through here. I accidentally shot some images in black and white earlier, because I forgot to change out of the black-and-white picture control, so there's a good lesson for you. So I would like to get rid of just these images at the beginning, and there are a lot of them. I want to keep this color images. So what I'm going to do is protect them. There is a button here that has a key on it. With any image selected, I can hit the Key button and now there is little Lock icon appears up here. So I can quickly go through here and lock the images that I want to keep.
Once I've got that done, I can go into my menu and say Delete and go down here and choose All, and I want to pick the card that I'm going to delete. I hit OK. All images in all folders will be deleted. That may sound ominous, but actually it's not going to delete the ones that have been protected. It says it's Done. If I go back to my Playback screen, you can see that they are still here. Now, they are still locked which means there's no way to delete them with the Delete command. That's okay. I'm going to go ahead and spend the rest of my day shooting, shoot another 200 images, take them back to my computer, copy them all over, and then put the card back in and format.
Format actually does wipe out images that are protected. So delete and protect work well in concert together--either of them are a way of cleaning up your card--but again, don't go too nuts deleting images in camera. Some things are obviously bad, like when you accidentally shoot black and white and you mean color or when you have left a finger in front of the lens or something like that, but it's difficult to judge image quality on the back of the screen, so don't write off an image once and for all--in most cases--until you get back to your computer.
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