85 questions linked to/from What exactly determines depth of field?
20k views

### Do I use the crop factor in calculating aperture size and area?

How do I calculate the aperture size and area, considering an 35mm equivalent focal length value and non-equivalent aperture f-number (in terms of exposure, no multiplication of the crop factor of the ...
3k views

### Is camera lens focus an exact point or a range?

I have often wondered if the focus of a lens at a particular focal length is an exact point or a range within a few millimeters. This becomes all the more important when manually focussing. How far ...
18k views

### At what shutter speed threshold does a tripod start to matter?

I use a Nikon D7000 with a prime 35mm/f1.8 lens. I usually shoot at the highest aperture with 200-1000 ISO, holding the camera steady and taking 6 or more shots in the hope of at least one coming out ...
6k views

### What are the depth-of-field capabilities of point & shoot cameras?

Is it possible to show following by using a point-and-shoot camera? shallow depth of field deep depth of field
4k views

### What is the “Circle of Confusion?”

I know that when I want to calculate Depth of Field by hand one of the variable elements in that equation is the Circle of Confusion. In layman's terms, what is the "Circle of Confusion," how do I ...
5k views

### What does small depth of field mean?

Can anyone clarify for me the various terms used to describe depth of field? There are so many it's hard without a photo dictionary to relate in my head what's actually being said to me about the ...
9k views

### Will a lens with a low aperture value give me better portrait photos?

I want to take pictures of people from 5-20 feet away. I attend lots of group events and am free to walk around and snap photos. I just purchased a Canon t3i and it comes with a 18-55mm kit lens. The ...
2k views

### How can I focus on only part of the scene when there are multiple objects at the same distance?

I just wanted to have the red leaf focus only, and not have the nearby twigs in focus too. How can I achieve that? I locked the focus on the read leaf then move the camera to reposition the scene. ...
19k views

### Why do I keep getting out of focus shots on manual focus?

I have a Nikon D3300. I recently switched over into complete manual mode (on the camera) with manual focus (on the lens). I find that the camera does not focus at all. All I get is out-of-focus shots. ...
1k views

### Is depth of field and bokeh influenced by distance to the subject?

I know that the aperture size has a direct effect on the depth of field. However, what about distance to the subject? Let's say I took two pictures, one at 24mm and one at 70mm, using the same lens ...
1k views

### How can I achieve this effect, where the flower is sharp and everything else is blurry?

I was wondering how it is possible to take a picture like this. Please have a look here for some example pictures. The flower is sharp, and everything else looks like taken with a long shutter. Is ...
2k views

### How to focus on an area correctly, while still blurring everything else?

I made a picture (see below) of an almond cake with the following settings: 4/3 sensor 25mm focal length Aperture f1.4 Shutter speed 1/30 sec I chose an appropriate shutter speed with the biggest ...
1k views

### Where to focus when shooting landscapes?

When I am shooting landscapes, where (at what point) should I focus when using Auto Focus? Or if I am shooting the lit up skyline of the city, what should be my focus point? The reason I ask is that ...