BastianK wrote: j4nu wrote: BastianK wrote:
Well, if you try to show something maybe you should do a proper tripod based comparison and with a non moving object.
And check first how decentered the lenses are, as that may also have an influence on the results.
And turn off IBIS.
And how does decentering affect bokeh in the center which I posted first?
You have a better explanation why the top of the lamp is clearly in the focal plane in one picture but not in the other?
I don't, except for either something being wrong with one of the lenses or your testing methods.
In the second comparison, which is a crop from the right side of the frame, Viltrox'es top of the lamp is in focus (more or less), while the Sigma's one is not. My only explanation is the difference in DoF between the lenses.
I'll redo the shot tomorrow with the camera upside down to check if it changes the focal plane with the lamp top in it:
*no off-axis comparison due to differences in my copies between the Sigma and the Viltrox.*
I see now it was a mistake on my part to post the off-axis comparison, as obviously I have not been diligent enough to measure my lenses' tilt and decentering beforehand and, subsequently, the transition zone of the Sigma does not fall in the same place as Viltrox'es one (which might be the case even if I had been diligent).
My main point was though, that even in the center Sigma's bokeh is smoother.
q.e.d.
BastianK wrote: j4nu wrote: BastianK wrote:
Well, if you try to show something maybe you should do a proper tripod based comparison and with a non moving object.
And check first how decentered the lenses are, as that may also have an influence on the results.
And turn off IBIS.
And how does decentering affect bokeh in the center which I posted first?
You have a better explanation why the top of the lamp is clearly in the focal plane in one picture but not in the other?
I don't, except for either something being wrong with one of the lenses or your testing methods.
In the second comparison, which is a crop from the right side of the frame, Viltrox'es top of the lamp is in focus (more or less), while the Sigma's one is not. My only explanation is the difference in DoF between the lenses.
I'll redo the shot tomorrow with the camera upside down to check if it changes the focal plane with the lamp top in it:
no off-axis comparison due to differences in copies between the Sigma and the Viltrox.
I see now it was a mistake on my part to post the off-axis comparison, as obviously I have not been diligent enough to measure my lenses' tilt and decentering beforehand and, subsequently, the transition zone of the Sigma does not fall in the same place as Viltrox'es one (which might be the case even if I had been diligent).
My main point was though, that even in the center Sigma's bokeh is smoother.
q.e.d.
BastianK wrote: j4nu wrote: BastianK wrote:
Well, if you try to show something maybe you should do a proper tripod based comparison and with a non moving object.
And check first how decentered the lenses are, as that may also have an influence on the results.
And turn off IBIS.
And how does decentering affect bokeh in the center which I posted first?
You have a better explanation why the top of the lamp is clearly in the focal plane in one picture but not in the other?
I don't, except for either something being wrong with one of the lenses or your testing methods.
In the second comparison, which is a crop from the right side of the frame, Viltrox'es top of the lamp is in focus (more or less), while the Sigma's one is not. My only explanation is the difference in DoF between the lenses.
I'll redo the shot tomorrow with the camera upside down to check if it changes the focal plane with the lamp top in it:
[/quote}
no off-axis comparison due to differences in copies between the Sigma and the Viltrox.
I see now it was a mistake on my part to post the off-axis comparison, as obviously I have not been diligent enough to measure my lenses' tilt and decentering beforehand and, subsequently, the transition zone of the Sigma does not fall in the same place as Viltrox'es one (which might be the case even if I had been diligent).
My main point was though, that even in the center Sigma's bokeh is smoother.
q.e.d.
BastianK wrote: j4nu wrote: BastianK wrote:
Well, if you try to show something maybe you should do a proper tripod based comparison and with a non moving object.
And check first how decentered the lenses are, as that may also have an influence on the results.
And turn off IBIS.
And how does decentering affect bokeh in the center which I posted first?
You have a better explanation why the top of the lamp is clearly in the focal plane in one picture but not in the other?
I don't, except for either something being wrong with one of the lenses or your testing methods.
In the second comparison, which is a crop from the right side of the frame, Viltrox'es top of the lamp is in focus (more or less), while the Sigma's one is not. My only explanation is the difference in DoF between the lenses.
I'll redo the shot tomorrow with the camera upside down to check if it changes the focal plane with the lamp top in it:
no off-axis comparison due to differences in copies between the Sigma and the Viltrox.
I see now it was a mistake on my part to post the off-axis comparison, as obviously I have not been diligent enough to measure my lenses' tilt and decentering beforehand and, subsequently, the transition zone of the Sigma does not fall in the same place as Viltrox'es one (which might be the case even if I had been diligent).
My main point was though, that even in the center Sigma's bokeh is smoother.
q.e.d.
BastianK wrote: j4nu wrote: BastianK wrote:
Well, if you try to show something maybe you should do a proper tripod based comparison and with a non moving object.
And check first how decentered the lenses are, as that may also have an influence on the results.
And turn off IBIS.
And how does decentering affect bokeh in the center which I posted first?
You have a better explanation why the top of the lamp is clearly in the focal plane in one picture but not in the other?
I don't, except for either something being wrong with one of the lenses or your testing methods.
In the first comparison I posted, which is a crop from close to center of the frame, no top of the lamp is in focus in my eyes:
In the second comparison, which is a crop from the right side of the frame, Viltrox'es top of the lamp is in focus (more or less), while the Sigma's one is not. My only explanation is the difference in DoF between the lenses.
I'll redo the shot tomorrow with the camera upside down to check if it changes the focal plane with the lamp top in it:
I see now it was a mistake on my part to post the off-axis comparison, as obviously I have not been diligent enough to measure my lenses' tilt and decentering beforehand and, subsequently, the transition zone of the Sigma does not fall in the same place as Viltrox'es one (which might be the case even if I had been diligent).
My main point was though, that even in the center Sigma's bokeh is smoother.
q.e.d.
BastianK wrote: j4nu wrote: BastianK wrote:
Well, if you try to show something maybe you should do a proper tripod based comparison and with a non moving object.
And check first how decentered the lenses are, as that may also have an influence on the results.
And turn off IBIS.
And how does decentering affect bokeh in the center which I posted first?
You have a better explanation why the top of the lamp is clearly in the focal plane in one picture but not in the other?
I don't, except for either something being wrong with one of the lenses or your testing methods.
In the first comparison I posted, which is a crop from close to center of the frame, no top of the lamp is in focus in my eyes:
In the second comparison, which is a crop from the right side of the frame, Viltrox'es top of the lamp is in focus (more or less), while the Sigma's one is not. My only explanation is the difference in DoF between the lenses.
I'll redo the shot tomorrow with the camera upside down to check if it changes the focal plane with the lamp top in it:
I see now it was a mistake on my part to post the off-axis comparison, as obviously I have not been dilligent enough to measure my lenses' tilt and decentering beforehand and, subsequently, the transition zone of the Sigma does not fall in the same place as Viltrox'es one (which might be the case even if I had been dilligent).
My main point was though, that even in the center Sigma's bokeh is smoother.
q.e.d.
BastianK wrote: j4nu wrote: BastianK wrote:
Well, if you try to show something maybe you should do a proper tripod based comparison and with a non moving object.
And check first how decentered the lenses are, as that may also have an influence on the results.
And turn off IBIS.
And how does decentering affect bokeh in the center which I posted first?
You have a better explanation why the top of the lamp is clearly in the focal plane in one picture but not in the other?
I don't, except for either something being wrong with one of the lenses or your testing methods.
In the first comparison I posted, which is a crop from close to center of the frame, no top of the lamp is in focus in my eyes:
In the second comparison, which is a crop from the right side of the frame, Viltrox'es top of the lamp is in focus (more or less), while the Sigma's one is not. My only explanation is the difference in DoF between the lenses. I'll redo the shot tomorrow with the camera upside down to check if it changes the focal plane with the lamp top in it:
I see now it was a mistake on my part to post the off-axis comparison, as obviously I have not been dilligent enough to measure my lenses' tilt and decentering beforehand and, subsequently, the transition zone of the Sigma does not fall in the same place as Viltrox'es one (which might be the case even if I had been dilligent).
My main point was though, that even in the center Sigma's bokeh is smoother.
q.e.d.
BastianK wrote: j4nu wrote: BastianK wrote:
Well, if you try to show something maybe you should do a proper tripod based comparison and with a non moving object.
And check first how decentered the lenses are, as that may also have an influence on the results.
And turn off IBIS.
And how does decentering affect bokeh in the center which I posted first?
You have a better explanation why the top of the lamp is clearly in the focal plane in one picture but not in the other?
I don't, except for either something being wrong with one of the lenses or your testing methods.
In the first comparison I posted, which is a crop from close to center of the frame, no top of the lamp is in focus in my eyes:
In the second comparison, which is a crop from the right side of the frame, Viltrox'es top of the lamp is in focus (more or less), while the Sigma's one is not. My only explanation is the difference in DoF between the lenses. I'll redo the shot tomorrow with the camera upside down to check if it changes the focal plane with the lamp top in it.
I see now it was a mistake on my part to post the off-axis comparison, as obviously I have not been dilligent enough to measure my lenses' tilt and decentering beforehand and, subsequently, the transition zone of the Sigma does not fall in the same place as Viltrox'es one (which might be the case even if I had been dilligent).
My main point was though, that even in the center Sigma's bokeh is smoother.
q.e.d.
