Railfan Technology > This is for the rivet-counter-photo-buffs among us.

Check out these two photos. The top one was processed
in December, 2016, while the bottom one was processed
just today. When I began to flick between the two photos,
it became apparent to me that software that corrects
lens defects can really make a difference in the final
product. I use darktable (linux) to process the original
*.NEF files, and those are transferred into gimp, with
which the final processing is done.

I'm sure that there are good digi/photo editors in both
the Mac and Win worlds.

John.

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Nice Work!  
Photo -2 does look crisper to me.

James R.(Jim) Baker
Whittier, CA

Yes, it is. But notice how the track in the top
photo bends downward, but the bottom one shows
a straight track, which it is. Also notice the
brick building in the background. The top photo
has that column bending, while the bottom photo
straightens out the column. The barrel of the
boiler is much straighter in the bottom photo.

Heh. The lens was a nasty old Nikkor 24-120
3.5-5.6 which has poor focus on the digi cameras.
It's saving grace was that it was cheap, and it
gave me a good look at that zoom range, which I
really like on full-frame camera. It was cheap,
and I eventually decided to take a crack a refurbished
f4.0 version with stabilization.

So what does it look like straight up, in other words without fiddling with the photo? I see the distortion you speak of but exactly what caused it is up for grabs as there should be one untouched also. Just wondering.

The top photo does not have any distortion
control, while the bottom one does. The
best way to see the difference is to download
the photos and quickly switch between them
with a viewer.

John.

jkh2cpu Wrote:
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> I'm sure that there are good digi/photo editors in
> both
> the Mac and Win worlds.

Correct. Darktable is ported to both. :D

Arved Grass
Fleming Island, FL