Hello,

Boris Liberman wrote:
Hi!

Here's another one from the Cassis little harbor town in France
riviera (some of you will remember the lighthouse).

http://www.lacouture.nom.fr/gallery/v/pano/pano-screen.jpg.html
Patrice, I think standard dpi measure is either 240 or 300... So it will have to be slightly smaller or slightly up-ressed.

Now, I have an idea... As an exercise for photographers they should be given a panorama image and a frame mask... The goal would be to extract a single frame image (with the mask) that would work.

I for one really like the lighthouse as it appears if I were to look on the left most part of the panorama. Strangely enough this Sigma lens holds the counter-light very well...

Boris
Thanks for viewing and for your comments.

I did the math with 220 dpi, because the max size my usual photo lab can give is 60cm wide by whatever you want long... And in this particular case it makes approx. 220 dpi.

As it is inkjet, with probably 5000+ dpi dot pitch and error diffusion patterns, there is no real need to stick to the machine's hardware resolution, like with digital minilabs based on DLP technology. I don't seriously intend to print anything this size anyway!

Regarding your "panorama and frame game", actually/ /I did the opposite. I shot the lighthouse alone first (earlier PESO visible here: http://www.lacouture.nom.fr/gallery/v/PESO/2006-02-27-Cassis---23.jpg.html or http://tinyurl.com/ffvpq) then wondered whether there would be a good pano around it.

I prefer the lighthouse alone, too.

Your game idea is good, though. I keep it for my Photo Club sessions. Nice exercise to train the newbies (and others!) eyes...

Regarding this Sigma lens, I've been very positively surprised with the images it produces since I bought it a few months ago, especially for the price (a bit below 300 EUR). As I post-process most images I shoot, its major flaws are not a big issue for me (huge distorsion at 18mm, vignetting at 18mm wide open, a bit of chromatic aberration - but not so much compared with many lenses), and the sharpness is not ridiculous given the 18-125mm range. Since I bought it, it only leaves by body to be replaced by the SMC A 50 f/1.7.

BTW, I left the UV filter on when shooting this pano. This must have slightly decreased the image quality regarding sunlight.

For those interested, I posted a "test" of my lenses at http://www.lacouture.nom.fr/LensTest/. This 18-125mm stands surprising well (of course, my 28-70 f/4 is broken and should not be taken into account).

These "tests" are not professional tests at all, and *do not* represent only the intrinsic characteristics of these lenses. They just reasonably represent what I can achieve with my gear by being a bit careful (tripod + AF + mirror lock-up).

Best regards

Patrice

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