High score! ! ! 3 photography focusing problem, 1 light problem. Please answer the master's question. Copy and paste large pieces. Don't bother if you don't pretend to understand.

The first question of bird shooting: I don't know what lens you are using. Generally, birds in cages are close-ups, so the gap between birds and cages seen in the focus picture should still be relatively large. Just pay attention and try to focus on birds; Another method is manual focusing, because birds in cages generally don't move too much, so it is an ideal method to switch to manual focusing.

The second question about shooting fish: In fact, as you know, shooting fish in an aquarium is really dim and not suitable for flashing, so a large aperture lens is the best solution. As for the background and prospect you mentioned, it becomes empty. Isn't this better? Also, if your SLR is high-end, such as D3S, then improve the ISO. ISO6400 of D3S is also good.

The third question is interesting. I don't know what your knife is like, but there are generally two reflective shooting techniques. High-level direct manual shooting works well. If you have bad eyes and only AF, then I'll teach you a trick: If you want to blur the knife, focus directly on the place where the reflected scenery is clearest; On the contrary, it is enough to put the knife on a flat surface where it does not reflect light. Of course, if the knife's reflective effect is not good, autofocus may not be able to focus on the reflective scenery. At this time, you can put a mirror with the same angle next to the knife to focus on the mirror, or focus it manually.

There is actually no special way to solve the last problem. The effect of taking portraits without lights is definitely poor. A reflector may also be used. There is no special way. Of course, if you really don't want to use lighting, you can take spot metering and matrix metering, but it is difficult to operate because the model will keep moving, and it is difficult to take two identical photos to synthesize. Generally speaking, shooting scenes can often improve tolerance. At present, the camera's tolerance is still very high. You can try to shoot with matrix photometry, and then brighten the model's face when you go home.

Midnight code word, give some encouragement ...