Mr Yahhhoooooooo, below is Rashkae's 2nd post in this thread. The 1st one wasn't quite related so I didn't quote it.
What he's saying is that if you
1) shoot 1 photo with the APS-C camera
2) without moving either the subject or the camera, switch the same lens to an FX camera and shoot again
3) Crop off the image from the FX camera to give same angle of view (or subject-to-image size)
the DOF does not change.
So please don't go plugging in the DOF calculator numbers and use 75mm focal length to argue your point.
Looking briefly at the points you've raised, I don't think you're technically incorrect. Just that you did not understand Rashkae's point, and have repeatedly misquoted him in order to have some online argument.
Actually I would like to chime in by saying that if lens, aperture, and camera-subject distance don't change, switching from DX to FX increases the DOF, due to the larger CoC of the FX sensor
Last edited by ZerocoolAstra; 23rd September 2011 at 05:30 PM. Reason: typo: replaced "didn't" with "did"
Just as an example, here are 5 of the times I have said that changing the distance will affect the DOF, which is the opposite of what you claim I said (that the DOF stays the same):
Please, if you still cannot comprehend what you read, stop posting. It will make the world a better place.
And what you gotta say about this:
Since you are smart. Can you enlighten me please? when I have already made this point:
But your sentence saying:
"Originally Posted by Rashkae
but since you need to shift closer to the subject to maintain the same frame subject size as on APS-C, you change the perspective, thus causing a thinner DOF."
already contradicted with it, didn't it?
Come on, grow up and accept new things
This is interesting. Same lens give the same DOF NO MATTER WHICH BODY IS USED. Oops. Time for more flaming ...
Last edited by Yahooo; 23rd September 2011 at 05:39 PM.
Yahoo I hope you ain't lose your ability to see this photo I posted. How the flip does focal length not affect perspective? I absolutely love people who answer questions selectively, because they ain't got no answer.Originally Posted by tehzeh
As for the question you posted to me, I don't have an answer for you because that was my assumption and I have the guts to face it.
A very talented display of cowarrdice through exhibiting indifference and lack of the ability to understand anything, deliberately, I would say.
Therefore I find it kind of amusing that this whole 'disagreement' took place at all
The arguments kind of got twisted in all sorts of weird ways. Best you take a pause and re-read through the posts, or else just walk away
To answer your question, yes I did look at the photos. I see the effort to maintain the same subject sizes in the 4 photos. However, it seems to me that this was done using different focal lengths at different distances. When you change the distance to subject, yes you change perspective.
If you put camera + 70-200mm on tripod. Shoot a picture @70mm. Shoot another picture @200mm without moving the camera. Take the picture @70mm and crop to match the subject size of 200mm picture, you will get 2 identical images. No "compression effect' difference. Which was done, test and verified in this: http://photography-on-the.net/forum/...d.php?t=672913
It looks like you didn't even bother reading the link I posted
first things first (and if i am permitted to say this), you guys are crazy enuf to fall for TS' trick to start a flame war. go to his post history and you will see he has done this before. post 1 post of potentially inflammatory remarks, and see who is dumb enuf to fall for it. works every time in CS, as far as i am concern cos a lot of people here are quick to shoot off their keyboards.
so rather than infracting everyone who started this bitchfest, which takes up too much of my time, i suggest you all take the chill pill and go watch the F1 practice sessions.
If Life worked on auto mode then manual mode for photography would have never existed.” ― Deeksha Mittal