Beginner angle of camera affect depth of feild?

[kellett]

Hello

I understand about lower f numbers produce a shallower depth of feild and and higher f number produce a deeper depth of feild. Different focal lengths also have an affect. Distance between you and your subject alongside and Distance between the object and background all have an affect. My question is if the angle of your camera is so extreme would this affect your depth of feild?

Kellett

 

[Kodiak Qc]

•
My first reflex is to answer NO!
…but this simple question may turn out to be a trap unless I know more
about what you mean by —angle of camera— just to be on the safe side!

 

[DuncanDisorderly]

Yes it does....
The same subject at the same distance - at 15mm there will be huge depth of field even at f4, pretty much everything sharp from about 10ft away to infinity. Whereas 400mm f4 will end up with a very shallow depth of field.
Totally different images resulting though so hard to compare other than pure depth of field.

The practical side of this is my cave photography often uses 15mm and I've never needed to stop down from f4, the DoF is that good.
Can't use f4 at 24mm in the same locations as the DoF is too shallow, never mind the problems of using longer focal lengths

 

[kellett]

Yes it does....
The same subject at the same distance - at 15mm there will be huge depth of field even at f4, pretty much everything sharp from about 10ft away to infinity. Whereas 400mm f4 will end up with a very shallow depth of field.
Totally different images resulting though so hard to compare other than pure depth of field.

The practical side of this is my cave photography often uses 15mm and I've never needed to stop down from f4, the DoF is that good.
Can't use f4 at 24mm in the same locations as the DoF is too shallow, never mind the problems of using longer focal lengths

Thanks for the response just to get my head around it a little more say 15mm and f8 if you had the camera on tripod with a rock as the main subject if you were to angle the camera level would the feild of view be the same if you had the camera at the same height but angled 45 degrees towards the rock would the depth of feild be affected from back to front (having all the scene sharp)

Hope that makes sense

Cheers kellett

 

[Phil V]

Thanks for the response just to get my head around it a little more say 15mm and f8 if you had the camera on tripod with a rock as the main subject if you were to angle the camera level would the feild of view be the same if you had the camera at the same height but angled 45 degrees towards the rock would the depth of feild be affected from back to front (having all the scene sharp)

Hope that makes sense

Cheers kellett

The shot would look odd. But your thinking is spot on, what you need is a tilt shift lens to take advantage of that phenomenon.

 

[Alastair]

Distance-to-subject is distance-to-subject, it doesn't matter what direction your camera is pointing in.

But changing the angle of the camera may change the relative angle between the plane of the sensor and the plane of the subject (it depends on the subject). It won't change the depth of field but it will change the distance-to-camera of other parts of the scene adjacent to the subject.

Trigonometry, Pythagoras, a2+b2=c2 and all that stuff you told your maths teacher would never be useful...

 

[kellett]

The shot would look odd. But your thinking is spot on, what you need is a tilt shift lens to take advantage of that phenomenon.

Understand the shot would be 'different' are they worth the asking price they come with?

 

[kellett]

Trigonometry, Pythagoras, a2+b2=c2 and all that stuff you told your maths teacher would never be useful...

Made me chuckle remember this being said a few times in class, thanks for the input

Kellett

 

[Phil V]

Understand the shot would be 'different' are they worth the asking price they come with?

If you need one, there's no option. There's a cheap alternative though (Samyang) and sometimes you can find a second hand bargain.

But (I'm not a landscape shooter) if I want front to back focus, I shoot it on my phone

 

[RichardTaylor]

Understand the shot would be 'different' are they worth the asking price they come with?

I have a few friends who own them.They love them when shooting 'scapes and it is not just the tilt function.

 

[snerkler]

Thanks for the response just to get my head around it a little more say 15mm and f8 if you had the camera on tripod with a rock as the main subject if you were to angle the camera level would the feild of view be the same if you had the camera at the same height but angled 45 degrees towards the rock would the depth of feild be affected from back to front (having all the scene sharp)

Hope that makes sense

Cheers kellett

Depth of field won't change unless you change the subject/focus distance. If you're focus point is the rock then camera to subject distance may fractionally change by tilting the camera and therefore DOF would correspondingly change. However the change in camera to subject distance will be so small changes in DOF will be negligible (unless some extreme example with wide aperture).