Linked Questions

57
votes
9answers
143k views

What is aperture, and how does it affect my photographs?

How does aperture affect my photographs? Why should I care about the aperture with which a photo was taken?
31
votes
8answers
36k views

Why are my photos not crisp?

I use a Canon EOS Rebel T3i (600D) with the kit lens. I have experimented a lot with different settings and modes, but I feel like I have wasted many good shots that could have looked amazing, if only ...
67
votes
7answers
22k views

What is a “diffraction limit”?

I've seen the term used, but what is a "diffraction limit", when should I worry about it, and what undesirable effects are a result of it ?
68
votes
5answers
10k views

What exactly determines depth of field?

There are several questions here about the definition of depth of field, about focal length, and about subject distance. And of course there's the basic how does aperture affect my photographs. And ...
28
votes
5answers
3k views

What are the best practices for DOF stacking?

What are the best practices for DOF stacking? How do you get the frames with focus just right amount apart? How do you stack them in post processing?
37
votes
4answers
4k views

How do I interpret an MTF Chart?

As part of how Canon (and other lens makers) give technical information about their lenses, they supply an MTF (Modulation Transfer Function) chart. How do I read and interpret what the chart is ...
10
votes
4answers
4k views

What is Depth Of Field bracketing?

I understand the concept of (auto-)bracketing, in general. And I understand that exposure bracketing is used for HDR and focus bracketing is used for focus stacking. But I am unable to imagine what ...
25
votes
3answers
6k views

Why isn't this portrait taken at f/29 sharp?

I am confused as to why this picture is not sharp. This is a portrait shot at F/29 ISO100 1/250 with a 17-85mm lens focused at 38mm. The subject distance was 1.2M. My DOF app tells me that my DOF ...
0
votes
3answers
883 views

How to get someone razor-sharp from head to toe from a distance of 12 feet (3-4 meter)?

I have tried several apertures, but I still can't get the entire body of the subject to be super-sharp. When the subject extends the arms, I find the hands to be less sharp than the eyes. I'm using a ...
3
votes
2answers
321 views

Is there a difference in sharpness between aperture stops?

Is there a notable difference in sharpness between aperture stops of a lens? If so, where can I find that information for my Canon 550d Kit lenses?