ok i'll try that when i get home, klaus, they were from a canon 10-22 on a 30d at 10mm

I vote for a 17 mm rectilinear lens !

Reason: I made 3 attempts at 20 mm, 14 mm and 17 mm and the last one results in the vertical image sides being straight while other atempts show some curvature (I used APG and it was bloody fast!)

BTW, where is this amphiteatre ?

grapedrink wrote:

it is the colosseum in rome

looks unfamiliar, strange -wouldn´t have guessed.

grapedrink wrote:

ok i didn't read all the arguing, i've been using zoombrowser for years, when i download the pictures of my card it automatically re-orients the photos that were shot vertical, its worked fine for 5+ years. something must have happened because now it doesn't automatically do it so i went and highlighted all the vertical shots and did it manually. these manually rotated shots in zoombrowser are what app cannot stitch properly. then i took an example of four jpgs that app was having trouble with, highlighted them, right click>convert in zoombrowser. this is just a quick and easy way to compress a jpg from 3-4 megs to 500k, i guess in the process it strips the exif. these are the jpgs i uploaded to you guys, but these stitch fine. so all that to say manually rotating images in zoombrowser (for me) creates jpgs that app does not like (but work fine in autostitch). not a big deal because i only use those jpgs for test panos, i shoot raw+jpg and eventually tweak and re-output everything from bridge but hadn't gotten to that stage with these photos. hope this helps you all, thanks again!

Not sure how Zoombrowser works, but sometimes when you rotate an image, you redo the JPG compression, loosing a little image quality.

Check your camera, make sure the auto-rotate feature is turned on.  In zoombrowser, tools-> preferences ->rotation, make sure "rotate original image" is _not_ checked.  (this will re-save the JPG if you check it.)  I don't see a setting for zoombrowser to not rotate an image if the rotation data is there, so its probably a camera setting (or a failure of the switch in the camera).

But try using Digital Photo Pro -- its another editor from Canon, and its free (at least to DSLR users). See if using that changes the orientation.

Or I'll give you the advice any help desk for a Windows product will charge $30 or so for--if its broke 1) reboot your system.  If its still broken, 2) re-install your application

Last edited by hankkarl (2009-03-03 17:20:10)

klausesser wrote:

10mm - that´s pretty wide . . and the 10-22 produces heavy non-linear distortions (at last the one i tested some time ago). Pictures better should be treated before with lens-correction - as the actual Canon "ProfessionalPhotographer" does.

In the US, its DPP - digital photo pro

hankkarl: I don't know about that proprietary software, but nowadays most open source software allow for lossless jpg rotation (by 90° intervals only)... just fyi. ;]

grapedrink wrote:

what do you guys do to correction distortions before stitching? i have a trial version of ptlens but when i load one of my shots from the 10-22mm lens it does virtually nothing to them, i have to manually mess with the sliders..

afaik DPP dos it with the 10-22mm. If you own a Canon it´s on your CD/DVD and upgrades are free.

A fine tool is LensTweaker on Macs - you print out an A3 chard, take shots of it using different focal-lenghts and let the tool correct the ditortions for every focal-lenght you use with that lens. Then save the scripts.
From now on the tool corrects the distortions of that lens automatically using the scripts.

If you mainly use 10mm it´s enough to print-out, photograph, correct and script for 10mm (which is most likely the most heavy distortion.
LensTweaker is very cheap - and valuable. The way printing out and photographing the chard is the best way to get a good correction.

But Andrew´s right: DXO pro is a very good tool - but expensive.

I´d suggest first to try the (free) DPP.

Last edited by klausesser (2009-03-04 01:00:38)

ah thanks i use ACR, much much prefer it over DPP but i'll re-install DPP to check out its lens distortions correction, thanks!

grapedrink wrote:

well i installed trail dxo because i don't have my canon cd handy and loaded a heavily distored jpg shot at 10mm.. what do you do to correct the distortion? if its automatic it isn't doing much

What did you expect it to do?

And what is it you wish to be able to do?

grapedrink wrote:

i thought it was supposed to correction lens distortion, it does nothing

Ok - there must be something wrong: i used DXO to correct lens-distortions before i started to use lenses free of distortions . .

Which demo-version did you try? Only the PRO version can do it!

http://www.dxo.com/uk/photo/dxo_optics_ … distortion

Last edited by klausesser (2009-03-04 20:57:15)

i did that but it doesnt give me dpp as an option just some firmware and a bunch of pdfs, i installed dpp from my disk and theres no lens correction option.. but i think maybe its too old, v2.1.1.4