I would like to add a recent
topic about the theoretical foundations of photography with a certain amount of practical information. It will be interesting, first of all, to those who choose another camera or lens for themselves (regardless of the qualifications of the photographer and the level of technology):
www.dpreview.com - detailed reviews and comparisons of cameras, rather quickly replenished as new models are released. For people in the history of photographic equipment there is an archive over the past years;
www.photozone.de/Reviews/overview - high-quality and informative lens testing reports for SLR cameras from various manufacturers.
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Update: as far as sites suggested by readers, for which they are thankful :)
www.steves-digicams.com/ - technology reviews, forum, “HowTo” selection;
www.imaging-resource.com - a selection of reviews of cameras, lenses, printers, scanners and other accessories.
www.imaging-resource.com/IMCOMP/COMPS01.HTM - a fun page that allows you to select two cameras and get a set of test images for comparison;
www.pixel-peeper.com - a large number of test shots for various equipment and links to reviews;
lenstip.com - detailed reviews of a large number of lenses;
www.the-digital-picture.com - reviews and test picture galleries;
www.dxomark.com - a clever system for assessing and comparing cameras by the dynamic and tonal ranges, color sensitivity and other parameters.