Retina Xenon Barrel Distortion

mh2000 said:
using a bubble level and tripod, while a good thing, will not correct barrel distortion.

Yes, this shot was handheld and I doubt anything was perfectly plumb.
Click to expand...

However, my point was: if not perfectly aligned at the time of shooting, one cannot conclude much about barrel or other lens distortions from a pic. Or, in other words: from this (unaligned) picture no inference can be made on the lens.

And : perfect shot alignment can never undo a lens error, of course.
 
I scanned some images on a Epson V700 scanner. The images were of random nature stuff so nothing was apparent. However, when I loaded the negatives into that somewhat ridiculous negative holder I did notice that the negatives were not held perfectly flat.
Where would that take us with this discussion? Will a scanner introduce distortion??
 
I'm using a Coolscan V with the FH-3 so it's pretty flat... yeah, with MF in my Epson 4990 I get distortion from lack of film flatness.

Regarding a level and tripod, no matter how you shoot a straight line it should remain a straight line if there is not barrel distortion.
 
Just incidentally, barrel distortion is something typically found in wide angle lenses. Pincushion distortion is found in telephotos. The Retinas come with pretty good normal lenses (on a rangefinder even fairly good usually is superb, when compared to an SLR) and it shouldn't have either -- unless you are shooting something way too close to the lens.
 
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