01-16-2012, 12:36 PM
[quote name='nandadevieast' timestamp='1326688922' post='14894']
Thanks.
Blur the background equally...For the same framing or the same distance?
Klaus: Can you elaborate, give me an example of 1.4x method you mentioned.
Brightcolours: What will be the DOF behind the subject wide open, if shot from the same distance from both the lenses? WHAT will be the DOF for the same framing? Which will blur the background more if the framing is same....
In terms of DOF/background blur, will these lenses behave like 60 and 90mm lenses or will they behave like 90 and 135mm lenses on a 1.5 crop camera?
In 35mm terms, the lenses are actually F4 and F2.8...so they will behave like this even on a crop camera, right?
Little complicated....but i will go by your general advice that both will blur the background equally.
Joachim: I like the 60 for its IF, i hate tubular lenses, visually.
[/quote]
Blur the background equally for the same framing.
I prefer to talk about amount of blur, than depth of focus. To me it makes little to no sense in talking about same distance... one frames the subject, one does not make distance to subject leading.
The blur will be about the same with the subject same size in each photo. That is due to the same aperture size. The shorter lens will show more possible distracting background, though, giving a more busy impression.
In terms of how much they blur, they behave like lenses with a 30mm aperture. In terms of field of view, they behave like 90 and 135mm lenses on FF. And like 60 and 90mm lenses on APS-C.
Personal note:
I will prefer the 90mm for portraits for its narrower filed of view and tele compression of distances.
I will prefer the 60mm for macro for its wider field of view. Not a fan at all of the 90-105mm macro class on APS-C, prefer either shorter or longer.
Thanks.
Blur the background equally...For the same framing or the same distance?
Klaus: Can you elaborate, give me an example of 1.4x method you mentioned.
Brightcolours: What will be the DOF behind the subject wide open, if shot from the same distance from both the lenses? WHAT will be the DOF for the same framing? Which will blur the background more if the framing is same....
In terms of DOF/background blur, will these lenses behave like 60 and 90mm lenses or will they behave like 90 and 135mm lenses on a 1.5 crop camera?
In 35mm terms, the lenses are actually F4 and F2.8...so they will behave like this even on a crop camera, right?
Little complicated....but i will go by your general advice that both will blur the background equally.
Joachim: I like the 60 for its IF, i hate tubular lenses, visually.
[/quote]
Blur the background equally for the same framing.
I prefer to talk about amount of blur, than depth of focus. To me it makes little to no sense in talking about same distance... one frames the subject, one does not make distance to subject leading.
The blur will be about the same with the subject same size in each photo. That is due to the same aperture size. The shorter lens will show more possible distracting background, though, giving a more busy impression.
In terms of how much they blur, they behave like lenses with a 30mm aperture. In terms of field of view, they behave like 90 and 135mm lenses on FF. And like 60 and 90mm lenses on APS-C.
Personal note:
I will prefer the 90mm for portraits for its narrower filed of view and tele compression of distances.
I will prefer the 60mm for macro for its wider field of view. Not a fan at all of the 90-105mm macro class on APS-C, prefer either shorter or longer.