lens aperture question

[Giovanni]

Hi all,
interesting question for you:

if you stitch together two 50mm photographs, assuming the stiching is perfectly on the border, do you get a 100mm final composite photograph?

In other words, do you add up the zoom used for the single shots?
If you think in terms of angle (50mm about 39d), it makes sense...

thanks

regards

gio

[meanadam]

No. You have 2 50mm images.

[oconv]

i would say the other way round:

you will get a total angle of 75.5d horizontally, which corresponds to 22mm focal lenght, assuming yor using a 24x36 camera.

-oconv

[tricky]

But you wouldn't be able to stitch perfectly along the edge of one image as there would be multiple perspectives going on.

[Giovanni]

oops, right, the mm. do not add (that is the focal lenght), but basically the angle of your views does add up, as mentioned by oconv....

In other words, when you create a panoramic out of multiple images, you do increase the angle of view, as if you were using a wider lens, correct?

If you stitch together two 50mm (39d) images, and you need to match the view in MAX, you need to set your cam at 78d wide (or about)...

Of course, the stitched image is never very accurate, since there will be different vanishing points...ideally you would use a wider lens, or fish eye.


thank you,

regards

gio

[CCS]

I never put that much thought into it. I find I can do photomatches much better by eye than by any formula or wizard.

You could always render 2x 50mm and stitch renders before comp.