don't quite undestand the question. what test do you propose i do?
Depth Of Field Preview Button
- Thread starter Red4Ever
- Start date
- Status
Headshotzx
Senior Member
You will only notice a change if you stop down your aperture. Like if its a f/2.8 lens, and you stop down to f/4, you will see the viewfinder darken etc.
luntut
Senior Member
i think it could be better. the quick whatever button above it should change places with the DOF button. i reach to that button more easily to the DOF button. middle finger longer.
you gotta go to M or A mode, set your aperture on your dial, den press that DOF button. it will stop down to the aperture size you selected. if you dun select, how to have something. if you dun see anything after u selected, time to send your cam in to NSC.
ahbian
Senior Member
Means your max aperture is f1.4 and you set it to f1.4? Then there should be no difference. Try setting to a smaller aperture.
Thanks all for the information. I can see the viewfinder darken when put to smaller aperture.
I am using 50mm f1.4 but i thought it was lock at f2.8, so when i set to f1.4, i would expect it to see shallower DOF but didn't notice that. Instead the physical aperture seems to closed up a bit, i guess my assumption of it is lock at f2.8 is wrong.
Another strange thing is that the picture capture seems to have shallower DOF then what i see from the viewfinder. Does anyone have this experience of it is just because the picture captured has been properly exposed.
I am using 50mm f1.4 but i thought it was lock at f2.8, so when i set to f1.4, i would expect it to see shallower DOF but didn't notice that. Instead the physical aperture seems to closed up a bit, i guess my assumption of it is lock at f2.8 is wrong.
Another strange thing is that the picture capture seems to have shallower DOF then what i see from the viewfinder. Does anyone have this experience of it is just because the picture captured has been properly exposed.
What do you mean lock at f/2.8?
When you have a f/1.4 lens, the aperture stays at f/1.4 until you shoot or press the DOF preview button. Then, it will stop down depending on what aperture setting you chose.
aungzawwin
New Member
which shooting mode you use when your 1.4 lens switch to 2.8?
i mean...if you use P mode, the cam may automatically set to f2.8 and appropriate shutter speed..
Av mode should be used to fix your aparture you set.
personally, I find it difficult to see the DOF preview through the view finder especially with large aparture..the preview does not turn darken.
except for curious reason, I never use that DOF preview thing:lovegrin:
Canik wrote: "Another strange thing is that the picture capture seems to have shallower DOF then what i see from the viewfinder. Does anyone have this experience of it is just because the picture captured has been properly exposed....."
This is due to the fact that your eyes has an aperture. In some conditions - low light - your aperture opens up = shallower preview. In brighter conditions, your eyes aperture becomes smaller = more depth of field. This is scene dependent.
Therefore, you will see the difference in what the actual DOF through view finder and the DOF of the actual image. Not many photographers realize this. This is based on my personal observations while doing macro photography and this is one key thing to note.
However the DOF gives a close resemblance of the final image.
This is due to the fact that your eyes has an aperture. In some conditions - low light - your aperture opens up = shallower preview. In brighter conditions, your eyes aperture becomes smaller = more depth of field. This is scene dependent.
Therefore, you will see the difference in what the actual DOF through view finder and the DOF of the actual image. Not many photographers realize this. This is based on my personal observations while doing macro photography and this is one key thing to note.
However the DOF gives a close resemblance of the final image.
Last edited:
on the 50mm f1.4, if i can visualize correctly, there is lock switch which can only be lock when f2.8 aperture ring is turn to that location. this is required to use the lens for DSLR.
It seems that f1.4 is not totally wide on the lense because when i select f1.4 and press DOF, the aperture blade actually close up slightly.
I was using Av or A in nikon. when you say large aperture do you mean higher or lower f value? If it is higher f value, my viewfinder will darken. But it looks to me now that the DOF feature in the camera isn't really great.
No, I think you are mistaken. The aperture ring locks at its smallest aperture size (which should be f/16). This is also why when you remove the lens from your camera, the aperture springs down to its smallest size. The markings for the lock happen to be above f/2.8, so that is probably what is causing confusion.
I do not understand what you are writing on the whole because of your failure to express in proper terminology.
aungzawwin
New Member
yeah..that's why I previously expressed to the TS why we need DOF thingy important to use..since we can take a shot and check on the LCD..
but I was once remarked by a senior bro that I was saying nonsense so I was a bit reluctant to say it again:sweatsm:
it seems I'm only curious.. and you are serious about this..
I'll keep reading this thread anyway
A lower F number gives you a larger aperture. oh and yes, the DOF function is great. maybe you have not found out how to use it yet. Its not about seeing how much the image will darken when pressing but checking the DOF of the shot. Yes, when one stops down the aperture, the image looks really dark, but it is still enough to check that the DOF is what you want.
LittleWolf
New Member
Not really. The reason is that focusing screens in most contemporary (d)SLRs deliberately compromise on their purpose in order to boost viewfinder brightness.
For a focusing screen to work, it needs to diffuse whatever light falls on it. This also means a significant part of the diffused light will not reach the eyepiece of the viewfinder, hence the viewfinder is not super-bright.
Modern focusing screens use micorolenses or similar structures that diffuse the light only rather slightly. More light reaches the eyepiece, but ouf-of-focus images do not get effectively blurred by the focusing screen anymore.
This is a deliberate marketing-driven compromise to make the viewfinders look better than they are, while simultaneously actually degrading viewfinder performance. AF SLRs inherently suffer from dark viewfinders as a lot of light is lost due to the semitransparent primary mirror; to make AF SLRs viewfinders look less awful next to manual focus cameras, poor focusing screens are used. Old SLRs from the 70s or early 80s are VASTLY better than the current crop when it comes to manual focusing or DOF preview.
The extreme case are clear glass focusing screens - they are used e.g. in microscopy and astrophotography. The picture appears pretty much always in focus, and an entirely different method for focusing (parallax focusing) is used.
yeah..that's why I previously expressed to the TS why we need DOF thingy important to use..since we can take a shot and check on the LCD..
but I was once remarked by a senior bro that I was saying nonsense so I was a bit reluctant to say it again:sweatsm:
it seems I'm only curious.. and you are serious about this..
I'll keep reading this thread anyway
Eh bro, don't say already lah...it was a misunderstanding. Haha.
sgfreestyler
Senior Member
i give it a try jsut now ..
the viewfinder did turn darker .. then from there how do i know the DOF ?
the viewfinder did turn darker .. then from there how do i know the DOF ?
sgfreestyler
Senior Member
so after i click on the DOF button .. i will snap lor
- Status
Similar threads
