panorama

[dogs100]

I am looking for some advice on the problem shown in the attachment. I can understand what causes the small loss shown in the top, bottom and right side edges but can't see why there is such a large, even rectangular loss on the top left corner. I am using a nodal ninja, have gone through all the set up routine and take care to level the tripod etc. I am convinced it's user error but am at a loss after that.
Any suggestions as to the cause or a solution would be welcome.
Thanks
Geoff

[wornish]

How many individual photos wide did you take to make the panorama?

and also

Looking at the EXIF it seems you did the panorama in Lightroom or was it done in-camera?


It does seem strange that the missing piece is such a large regular shape.

[dogs100]

Annoyingly I deleted the individual photos so I had to work it back from the frame no.s, but it was two rows and either 6 or 7 per row. I stitched them in lightroom and when I noticed this I ported them to photoshop and tried again, with the same result. I did another 4 panos on the same outing, all double rows and between 4 to 6 frames per row but this was the only one like that. Maybe a row of 7 (if it was that) was a frame too far.
I am intrigued but stumped.

[wanderer]

If its 2 rows, it looks like one of the upper ones is missing if you are using a big overlap vertically. Its easy to lose count of no. of shots and where you started ( and finished).
I notice you mention the use of a nodal ninja. I've never used one and have only had problems using a (very) wide lens for a panorama.
I generally try not to use a focal length (35mm equiv.) wider than 35mm and preferably on the long side of 50mm.

[dogs100]

Thanks for the input and that seems the logical explanation, ironically I use the ninja because it (in theory) makes me slow down and not make silly mistakes ... but in this case ... hmmm.
As an aside, I normally shoot my panos at around 25mm (50mm equiv) just because I feel comfortable with that although these were at 40 (80) equiv.

[wornish]

Did you use RAW files or jpg. I would have thought PS could handle 12 or 14 files without complaining, even if they are large in RAW format. If the individual frame in the top left lacked any clear defining objects the panorama algorithm might not know where to put it. In PS I think there is an option to fill in the blanks.

[dogs100]

They were raw files, off an e-m1ii so about 18-19 mb per frame. I wondered whether the lack of detail confused lightroom and after you mentioned it as well I checked back on another one from the same shoot (attached) which is also lacking in detail in the top left and that doesn't seem to have that problem. Filing in the blanks isn't an issue as I can use content aware but I am intrigued as to what caused the problem. I think the moral here is don't delete the originals ... it would have been interesting to see if that had the gap, from memory, (but it is only memory) it didn't.
Thanks for the input.