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09/07/2007 11:31:21 AM · #1 |
I just got a 90mm tilt shift lens. Can someone tell me how exactly I should be focusing with this lens? This is what I do. Let's say I am interested in shift not tilt. I have tilt/shift in O position. I focus then I shift. The back of the object gets sharper but the part I focused on originally gets blurry. Once I shift I refocus on the part I had in focus originally.
Is this how this should be done? |
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09/07/2007 12:09:26 PM · #2 |
| Don't know but can't wait to see some pics! Have been considering buying one for architectural shots. |
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09/07/2007 12:09:52 PM · #3 |
That's odd, because you are describing a focus shift that typically appears during tilt, not shift. In theory the focus will remain t.he same during shift. Regardless, when using tilt/shift lenses it is always best to rough focus, make the movements, then refocus. They are lenses intended for use from a tripod, and designed with precision focusing in mind.
For using the tilt, you'd be wise to familiarize yourself with the Sceimpflug Rule,, which states that when the plane of the subject, the plane of the film/sensor, and a plane perpendicular to the axis of the lens all intersect at the same point, then everything along the subject plane will be in focus at the same time. You can look at the linked illustration and then google for further discussion.
Or ask me, if you have further questions :-)
R.
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09/07/2007 12:11:24 PM · #4 |
Originally posted by routerguy666:
Don't know but can't wait to see some pics! Have been considering buying one for architectural shots. |
90mm is nowhere near wide enough for architecture, though. Need the 24mm version, really. That'll work pretty wide on the 5D :-)
R.
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09/07/2007 12:46:22 PM · #5 |
| Well the tilt-shift in general I mean. |
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09/07/2007 12:48:41 PM · #6 |
Originally posted by routerguy666:
Well the tilt-shift in general I mean. |
Gotcha. I used to have the 24mm and 35mm tilters for my Nikon. I loved those lenses...
R.
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09/07/2007 07:40:14 PM · #7 |
Originally posted by Bear_Music:
That's odd, because you are describing a focus shift that typically appears during tilt, not shift. In theory the focus will remain t.he same during shift. Regardless, when using tilt/shift lenses it is always best to rough focus, make the movements, then refocus. They are lenses intended for use from a tripod, and designed with precision focusing in mind.
For using the tilt, you'd be wise to familiarize yourself with the Sceimpflug Rule,, which states that when the plane of the subject, the plane of the film/sensor, and a plane perpendicular to the axis of the lens all intersect at the same point, then everything along the subject plane will be in focus at the same time. You can look at the linked illustration and then google for further discussion.
Or ask me, if you have further questions :-)
R. |
Sorry, you are right, I meant to say tilt when I said shift. I am going to read a bit and then I will come back when I have questions.
I am not using this lens for architecture.
Message edited by author 2007-09-07 19:41:59. |
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09/07/2007 08:03:15 PM · #8 |
I found this article to be very helpful
Article
I will try to shoot tomorrow
Message edited by author 2007-09-07 20:04:43. |
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09/07/2007 08:05:42 PM · #9 |
Originally posted by Bear_Music:
That's odd, because you are describing a focus shift that typically appears during tilt, not shift. In theory the focus will remain t.he same during shift. Regardless, when using tilt/shift lenses it is always best to rough focus, make the movements, then refocus. They are lenses intended for use from a tripod, and designed with precision focusing in mind.
For using the tilt, you'd be wise to familiarize yourself with the Sceimpflug Rule,, which states that when the plane of the subject, the plane of the film/sensor, and a plane perpendicular to the axis of the lens all intersect at the same point, then everything along the subject plane will be in focus at the same time. You can look at the linked illustration and then google for further discussion.
Or ask me, if you have further questions :-)
R. |
when I refocus, do focus on the front of the subject? |
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