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Converters, adapters and extension tubes All those lens accessories that get in between the lens and the camera.

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  #1  
Old 2nd November 2013
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Using IS as a shift adapter?

Hi there!

Does anyone know how far the sensor moves on IS equiped cameras? My reason for asking is that if the sensor can move a considerable amount (more than 1/3rd the width / height of the sensor) in each direction, then it should be possible to use the IS as a shift lens. This is presuming that you would be using the camera on a tripod (to keep it level) so IS isn't needed.

All it should need is a rewrite of the firmware to give an additional mode where it tells the IS sensor shift to move the sensor to the maximum in the required direction. Because the lenses are designed to work with the IS at full travel it should remain inside the image circle so there wouldn't be any vignetting (or because the camera knows about it it could compensate for it.)

It would be a great free extra feature which the other manufacturers wouldn't have!

Cheers for reading my ramblings,

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Old 2nd November 2013
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Re: Using IS as a shift adapter?

It would be interesting but surely it doesn't move that much?
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Old 2nd November 2013
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Re: Using IS as a shift adapter?

I don't know, but I guess movement would not exceed 1mm.
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Old 2nd November 2013
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Re: Using IS as a shift adapter?

I don't think there's to much movement, a mm or two maybe. Some years ago there was a thread on a 4/3 site about someone building a shift lens for 4/3 using a Tamron 17mm and a microscope stage. Should be easier with n4/3 as you've got more space between a legacy lens and the sensor.
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Old 2nd November 2013
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Re: Using IS as a shift adapter?

I meant a greater distance between a legacy lens and the lens mount on a m4/3 body. Early morning here an not enough coffee in me yet.
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Old 2nd November 2013
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Re: Using IS as a shift adapter?

On a slightly different tack, when I called in to SRS about a year ago I was told that the Pentax was favoured by astro-photographers because the IS could be used to 'track' objects. Don't know how you'd do it mind. A 'dummy' sensor model they showed me really had quite a few mm of movement in either direction.

Edit Just done a bit of Googling and found this: http://e-group.uk.net/forum/showthread.php?t=29923

Specifcally, the para "The compass shows magnetic north so is ideal for astro-photographers and it's this aspect that the unit really shines. It has an Astrotracer feature that utilises the camera's anti-shake feature to adjust the sensor in sync with stars so they remain in a fixed position as solid points in the photo, making night sky photography easier."
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Re: Using IS as a shift adapter?

Hi there everyone!

I seem to remember seeing a demo video of one of the early olympus IS cameras where they had the sensor exposed and were moving it by nudging the gyros. I think it moved more than a mm, but it may not be enough to emulate a shift lens - I would think that it would need to move at least 5mm to be of any use. I can see this ending up with my opening up my E-510 for a poke about

Cheers,

Ralph.

Ps the pentax moving sensor for astrophotography idea is a great one!
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Old 19th February 2016
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Re: Using IS as a shift adapter?

Affordable shift adapters are now available.

Harold
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Old 19th February 2016
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Re: Using IS as a shift adapter?

I doubt very much if it's more than a millimetre, if even that much. It's designed to cope with an unsteady hand, not major movements. If you enable the preview function you can see that you don't need to move the camera much at all before the viewfinder image follows it.
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Old 19th February 2016
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Re: Using IS as a shift adapter?

It would be nice but I doubt it is possible just from the movement needed. You would also need a new lens with a larger image circle to avoid shifting the sensor into darkness... or use an adapted legacy OM lens [other lenses are available].

It would be nice if Oly could adopt the astro tracking function though but I'm not sure how much tracking time there is available.
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Old 20th February 2016
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Re: Using IS as a shift adapter?

Quote:
Originally Posted by OM USer View Post
It would be nice but I doubt it is possible just from the movement needed. You would also need a new lens with a larger image circle to avoid shifting the sensor into darkness... or use an adapted legacy OM lens [other lenses are available].

It would be nice if Oly could adopt the astro tracking function though but I'm not sure how much tracking time there is available.
It would also need a wider lens opening so the displaced portion of the sensor still gets to see the image...

There are now a range of clever extras being done with sensor movement, but I'm afraid shift isn't going to be a practical one. Fortunately there are a number of shift adapters available for old lenses - none yet down to the price I can justify to play with the technique unfortunately
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Old 20th February 2016
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Re: Using IS as a shift adapter?

Just to throw a spanner in the works of this old thread. How about tilting the sensor for depth of field control.
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Old 20th February 2016
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Re: Using IS as a shift adapter?

Quote:
Originally Posted by David M View Post
Just to throw a spanner in the works of this old thread. How about tilting the sensor for depth of field control.
More practical but the range of movement is probably still an issue.

In tilt photography, the plane the sensor is part of, plane of focus & an imaginary plane perpendicular to the lens axis must all meet at a line. On normal cameras this happens at infinity as all 3 are parallel. Sorry for the poor explanation but I refuse to try & spell the Sch......flug principle

To get a significant effect with 4/3 using a tilt adapter I usually have to tilt the lens by at least 5
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Old 20th February 2016
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Re: Using IS as a shift adapter?

Quote:
Originally Posted by Petrochemist View Post
More practical but the range of movement is probably still an issue.

In tilt photography, the plane the sensor is part of, plane of focus & an imaginary plane perpendicular to the lens axis must all meet at a line. On normal cameras this happens at infinity as all 3 are parallel. Sorry for the poor explanation but I refuse to try & spell the Sch......flug principle

To get a significant effect with 4/3 using a tilt adapter I usually have to tilt the lens by at least 5
I can't be bothered researching or plotting it out but off the top of my head, shouldn't the angular tilt required be the same regardless of size/format?

But even a moderate 10 tilt would require a lot of space inside a body so maybe not a practical idea.
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Old 21st February 2016
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Re: Using IS as a shift adapter?

Quote:
Originally Posted by David M View Post
I can't be bothered researching or plotting it out but off the top of my head, shouldn't the angular tilt required be the same regardless of size/format?
For increasing effective DOF by aligning the plane of focus with the subjects, I suppose it would.
Shift is frequently used for fake miniatures these days, where more tilt is needed with small formats to overcome their greater DOF. Sadly all I've done with it recently has been along this line. I really must do some more creative shots with it!
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