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07-15-2013, 02:35 PM   #1
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Tilt / Shift tables for us APS-C users?

Hi,

I have a Mirex Pentax 645 to K mount Tilt / Shift adapter. I have been doing a lot of reading on how to achieve the proper tilt angle fairly quickly based on the "j" distance. I was wondering if anyone knows if the tables widely available (from Luminous Landscape & North Light Images) are applicable for the APS-C sensors? I'm guessing the sensor size doesn't have anything to do with the formula.

I am using Pentax 645 35, 45, & 75mm lenses with the adapter, and was also wondering how to make the calculations for those specific focal lengths? All of the info I've found pertains to the Canon T/S lenses, which besides the 45 are all different. I was hoping to make my own little tables based on my specific setup.

I'm hoping someone here has found this info and could pass it along.

Thanks!

George

07-15-2013, 04:39 PM   #2
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Where did you buy the Mirex and how much did you pay?
I didn't know it existed!
07-15-2013, 05:03 PM   #3
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They are not cheap. Over $600 delivered tonthe USA.
07-15-2013, 05:19 PM   #4
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QuoteOriginally posted by gsrokmix Quote
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They are not cheap. Over $600 delivered tonthe USA.
$600 is cheaper than other options, so it's relative.
I sent an email to them.
Thanks!

07-15-2013, 05:55 PM   #5
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Let us know how this performs, could be a great T&S option!
07-15-2013, 06:20 PM   #6
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What field of view are you able to get with your widest lens? ie, does the adapter affect the field of view of the lens?
07-15-2013, 06:45 PM   #7
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Here is a bit more information (be it in a M42 mount on a Sony, using Mamiya 645 lenses) along with pictures.....

Last edited by interested_observer; 07-15-2013 at 06:51 PM.
07-15-2013, 07:25 PM   #8
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Calsan,

FOV is the same as any lens at a given focal lemgth. The much larger image circle lets you move the lens around via the tllting and shifting. The one thing I wish I had with this adapter is the ability to use both tilt and rise and fall together. The way the adapter is made you can only do tilt with shift, or rise and fall with swing.

07-15-2013, 07:46 PM   #9
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QuoteOriginally posted by gsrokmix Quote
Calsan,

FOV is the same as any lens at a given focal lemgth. The much larger image circle lets you move the lens around via the tllting and shifting. The one thing I wish I had with this adapter is the ability to use both tilt and rise and fall together. The way the adapter is made you can only do tilt with shift, or rise and fall with swing.
And the problem is that the shortest 645 focal length priced appropriately for mortals is 35mm. That is a little long for effective T/S with APS-C, but would work quite nicely for FF 35mm film.


Steve
07-15-2013, 08:49 PM   #10
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Thanks for the replies. So we're not there yet, as far as the ideal of having a 70 or 90 degree TS for digital... oh well, there's always photoshop.
07-16-2013, 09:23 AM   #11
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QuoteOriginally posted by calsan Quote
Thanks for the replies. So we're not there yet, as far as the ideal of having a 70 or 90 degree TS for digital... oh well, there's always photoshop.
Well, if Pentax had a 24x36mm sensor, you could still use this adapter...

Id love to try some TS lens but its too expensive for me.

@gsrokmix please post some photos when possible.
07-16-2013, 04:41 PM   #12
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When I have some pix of things other than focus charts, I will definitely post them!
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