Creating Pano 2 shots 17mm tilt shift lens

[Rob Christy]

PTGui creates a keystone in the pano that I caanot correct for. Sides always stay keystoned. Canera was dead level. Converted the RAW files to TIF as recommended by PTGui. Optomizer says

Very Good"

I am new with this software. Using the same camers Canon 5DSR and 17mm TS I did an 8 shot pano in the vertical/portrait mode with no issues. Looked perfect

Both are swimming pool images with pool cages, pool cage shadows, custum shaped pools and stone pool deck with prominent grout lines. Lots of "stuff to line up. I am impressed. Was hit or miss when attemting to do this in Photoshop 2019CC. The issue is keystoning in the pano shot.

What am I doing wrong with this image please.

[John Houghton]

Rob, It would have been helpful to supply copies of the camera images, but I have done what I can with small thumbnail images extracted from the screen shots. The problem is the lens shift.  You need to help things along by adjusting the vertical shift (the short side shift) of the lens parameters (in Advanced mode) to approximately -14%. This will get the horizon into its normal position running across the centre of the Panorama Editor window.  Including that parameter in the optimization will fine tune its value.  Vertical line control points on vertical features will take care of the overall levelling. If you care to supply copies of the images (half size jpegs would be ok), I would be happy to create a project file for the stitch.

John 

[Rob Christy]

Thank you for your help.

I am commited to mastering your software. I have a nice long term contract with a major high end pool company her in Florida. I have phootgraphed 30 so far using my Canon 24 and 17mm tilt shift lens and 16-35 wide angle. I know they have another 40 poosl to photograph before I get caught up with newer ones being constucted in 2019. I want to stop using Photoshops stiching software...sometimes it is ok sometimes not. Taking to much time.

First clarification on these 2 images. The lens may have been shifted down slightly to frame the shots...I just don't remember. After this I took 2 shots by moving the camera to the left and then one more by moving the camera right on a Really Right Stuff BH 55 Ball head and their panning head and rail... perfectly level. and located on the rail after determining the nodal point.Shifing was only used to frame the 2 shots. 

So I read this in your help section later. Do I do this when shifting is part of the actual photo process only or as I described above where shifting is not?

In either case when using my tilt shift do I need to run the optomizer by processing F5 evrytime I stitch a set of individual shots to create a pano? Or does the software defaut to the optomized setting whenever I use the tilt shift lens either for framing or shifted  for each shot

If you do want to stitch images taken with a shift lens in PTGui, change the following parameters:

• Switch to Advanced mode by pressing the Advanced button in the side bar
• In the Lens Settings tab, select 'Individual Shift Parameters' for all images for which the lens was shifted
• Run the optimizer by pressing F5

Second question: Shooting swimming pools am I better to take more shots in the portrait mode or fewer shots in the lanscale mode to achieve the same pano image? Does it matter which way is best?

Attached are the 2 RAW files i saved in Photoshop 2019cc at 72 dpi

Thank you John. I await your respose when you have time available

Rob Christy

[John Houghton]

Rob, While PTGui will stitch many (most?) sets of run-of-the-mill images in automatic mode using the Align Images function, it does have the flexibility to cope with images shot in a less conventional manner.  To do so may involve some manual intervention in the stitching process.  This is generally achieved by accessing operations available in Advanced mode.  In particular, you may need to customize options on the Lens settings tab and the Optimizer tab, depending on how you shot the images. By doing so, you can successfully stitch sets of images shot with a mixture of different cameras/lenses at any angles you fancy and in different orientations - not arranged in any particular rows and columns fashion. However, processing is considerably eased by shooting in as consistent way as possible to avoid the use of individual image/lens parameters as possible.  So if you choose to use a variety of lens shifts for the various shots in the panorama, the optimizer will need to take this into account by varying individual lens shift parameters rather than relying on a global parameter that applies to all of the shots. It's therefore sensible to shoot all of the images as far as possible in an identical fashion. It doesn't matter to PTGui whether you shoot all of the images in portrait orientation or landscape orientation.  The end result will be the same.  Normal photographic considerations of such things as focus and depth of field may influence your choice.

I've attached the project to stitch your pair of images. Display the settings used in the Optimizer's advanced page. I used vertical line control points to level the panorama (see levelling tutorial at www.johnhpanos.com/levtut.htm ).

John

[PTGui Support]

Hi Rob,

You can of course use the TS lens but I would just let it sit in the
center shift position. Don't shift the lens, there's really no benefit
at all.

Don't forget to check your setup for parallax.

"Individual Shift parameters" should be enabled only if you used
different shift positions for the images in the panorama.

If you used the same shift, PTGui should in priciple be able to figure
that out, just run Align Images. Only if the shift was large you will
need to help PTGui a bit by entering the approximate shift value in the
Lens Settings tab. If you keep the TS lens in its center position, you
can just run Align Images and you shouldn't have to fiddle with the
advanced settings in PTGui.

In general it's easier to create spherical panoramas using a fisheye
lens because these have a wider field of view. You'll have fewer images
to stitch, and reduce the chance of images containing only blue sky or a
white wall. Only if you need the higher resolution a longer lens would
be needed.

Kind regards,

Joost Nieuwenhuijse
www.ptgui.com

> * Switch to Advanced mode by pressing the Advanced button in the
> side bar
> * In the Lens Settings tab, select 'Individual Shift Parameters'

> for all images for which the lens was shifted

> * Run the optimizer by pressing F5

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