On Thu, 07 May 2015 01:40:37 -0800, (Floyd L.
Davidson) wrote:

Sandman wrote:
In article , Floyd L. Davidson wrote:

Peter Jason:
I have some old photos of my locality going
back about 70 years.

I want to compare these old scenes with their modern
equivalents.

How does one position a camera (and lens) to match the
ancient scenes so that the old & current images are
superimposable (or nearly so).

Peter

Sandman:
You take a wider shot and then crop. Photoshop can
help you fix perspective differences as well, but the closer
you are to the same spot when you take the pic, the better.

Floyd L. Davidson:
You can't change the perspective in post processing.

Sandman:
With modern software, you can.

You can not.

Incorrect.

Take a picture of a car parked in front of your house from across
the street with a 105mm macro lens. You'll be able to see a great
deal of your house.

Now use the same camera and lens to take a picture of the same car,
except shoot from 3 inches away from the car door at the door's
midpoint. You won't be able to even see your house, much less any
of it's details.

That is the perspective which is important in recreating an older
image. It depends entirely on the location of the camera when the
picture is taken. It cannot be adjusted even slightly in post
processing.

Learn to read, Floyd.

Yeah, right!

Sandman bites the dust... one more time. (And poor nospam goes too.)

You are right (about perspective). Perspective is determined by
'sight-lines' originating with the viewer's eye or, in this case, the
camera lenss. You can only chnge perrspective by changing the view
point. Focal length doesn't affct perspective. It only affects field
of view.
--

Regards,

Eric Stevens