Manual Focus Lenses Forum

eggplant · Joined: 27 May 2020 Posts: 517

FULL .png ALBUM https://flic.kr/s/aHBqjzV4hJ
FULL .svg Drive link: https://drive.google.com/drive/folders/1S_l19PnLXfbrgutyCGQsP9e---jUK-cs

Notes on process

from https://web.archive.org/web/20040116064342/http://www.sigma-photo.co.jp:80/english/brochures/pdf/SIGMA-lens-German.pdf

.pdf file imported into Inkscape (internal import, embed images off, 246.0 precision of approximating gradient meshes), lens diagrams saved individually as plain .svg files. PNGs created from .svg files at 4800dpi, RGBA_8 bit depth, default compression, CAIRO_ANTIALIAS_BEST antialiasing.

The lens technology text that is spread over different columns/pages has been 'stapled' together, to make one big paragraph. Irrelevant text on the floating system technology was removed.

eggplant · Joined: 27 May 2020 Posts: 517

Commentary

This might be a little too modern for some, but you'd be surprised at how inconsistent the documentation of these lenses can be, such as the resolution of the diagrams (or if they even have them at all). So it's useful to have.

At any rate we get a quality .svg of the popular 600mm f8, and some of the fisheyes which also date back to the 90s.

I already looked on Tamron/Minolta's website to see if they had any similar old .pdfs with lens diagrams in them, and couldn't find anything on wayback machine.

There are a couple of line errors (see 600mm f8 last element) but don't think it's an artifact of Inkscape, which can handle the .svg files with no trouble/errors. Some diagrams like the f1.8 fast wide primes have extra lines but they were visible in the .pdf brochure.