MFDB to exclude for shift-tilted shots

[favalim]

I've been told from a Phase One seller that the P30 is not good to be used  with tilt/shift lenses or used on a view camera. So is there the same problem with other MFDB from Leaf, Sinar or Hasselblad?

Thanks

[michael]

The P30 uses microlenses, which make it inappropriate for use with camera movements. The P45 and P25 don't, and thus have no such problem.

Michael

[RKH]

The P30 uses microlenses, which make it inappropriate for use with camera movements. The P45 and P25 don't, and thus have no such problem.

Michael
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How severe are the colour shifts though; has anyone tried this combination with say a Hartblei Super Rotator? Are the shifts so severe that they cannot be corrected to a usable-degree?

Ras

[Don Libby]

My research on this is that it only comes into play with a view camera.  I finaly got a Hartible 45 T/S Super Rotator.  Waited for about 5 weeks and it just came yesterday.  I tried it out about five minutes after unpacking it on my Mamiya 645 AFD w/loaner P30.  Other than screwing up the focus, I was pleased with the overall image.  I'll try for another one and see about posting it.

This is a cut and paste from Phase One site re the P30:

Technical & large format camera support
Note: Wide angle and large format tilt and swing positions may produce a colorcast in the image
4" x 5": Arca Swiss, Cambo 4x5, Rollei Xact, Linhof M679/4x5, Toyo, Sinar, Plaubel, Horseman

This is the only mention of the P30 having a problem with T/S

Don

[RKH]

My research on this is that it only comes into play with a view camera.  I finaly got a Hartible 45 T/S Super Rotator.  Waited for about 5 weeks and it just came yesterday.  I tried it out about five minutes after unpacking it on my Mamiya 645 AFD w/loaner P30.  Other than screwing up the focus, I was pleased with the overall image.  I'll try for another one and see about posting it.

Don
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That's great to hear Don. I look forward to your findings upon further testing!

All the best,

Ras

[clawery]

Both the P30 and P21 have microlenses that can effect your image with extreme shifts/tilts.  It's not to say that you can not use a P30 or P21 on a technical camera, but be aware of some of effects with movements.  I would recommend two things:  1. Shoot a LCC with a major shift or tilt.  2. Test your camera and DB with the types of shifts you might encounter when shooting.

Chris Lawery
Sales Manager
Capture Integration
www.captureintegration.com

[snickgrr]

Wikipedia list thirty five different possiblities for LCC but none seem relevant.
What is LCC?

[peterhorsley]

The P30 uses microlenses, which make it inappropriate for use with camera movements. The P45 and P25 don't, and thus have no such problem.

Michael
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Are the micro lenses the only factor?  Canon sensors (CMOS) have micro lenses and seem to work OK with TSE lenses.  Perhaps it's a CCD/micro lens thing?

Cheers

Peter

[ctz]

LCC stands for Lens Cast Correction.
You shoot with a plexi in front of the lens and then this shot may be used as a reference by the Capture One software to correct the actual shots.
Might sound a bit annoying, but the feature is in fact simple and does a very good job when you need this kind of correction.

[snickgrr]

Like the Gain files in the Leaf vernacular.

[ctz]

Not sure what Leaf Gain is/does.

[snickgrr]

Well, I'm glad I didn't say the GF then....it's the same as the LCC, plexi in front of the lens to create a software correction for tilts, etc.

[favalim]

What about Leaf and Hasselblad DB? Do they also use microlenses in some of their models?

Thanks

[thsinar]

... and so are the Sinarbacks: whatever model, they DON'T use microlenses on top of the pixels, making them suitable for any shift, tilt or swing on a view camera.

Thierry

The P30 uses microlenses, which make it inappropriate for use with camera movements. The P45 and P25 don't, and thus have no such problem.

Michael
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[clawery]

Here is an article that Walter Borchenko has posted on Phase One's web site.  It will tell you a bit about what an LCC (Lens Cast Calibration) is and how to use it in your workflow.  Bascially, it creates a mask that you can easily create, save and apply.

http://www.phaseone.com/Global/LCC.aspx

Chris Lawery
Sales Manager
Capture Integration
www.captureintegration.com

[Ken Doo]

Here is an article that Walter Borchenko has posted on Phase One's web site.  It will tell you a bit about what an LCC (Lens Cast Calibration) is and how to use it in your workflow.  Bascially, it creates a mask that you can easily create, save and apply.

http://www.phaseone.com/Global/LCC.aspx

Chris Lawery
Sales Manager
Capture Integration
www.captureintegration.com
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I think it is worth looking into----I don't have much time to play, but would love to see some results on T/S and the P30 on medium format.  Even in Borchenko's article the context is for large format cameras....  I think the advice from Chris Lawery is good----you just need to be aware of the possibility of LCC with t/s lenses.....

"Lens casts typically occurs when working with camera backs on large format cameras and with wide angle capture. In Capture One PRO it is easy to compensate for lens cast by doing a lens cast calibration, LCC...." (Borchenko)