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Experimental things
K5 with Sigma 70-210 manual-focus, KA mount. Zoomed all the way in to 210mm plus Vivitar 3X KA mount teleconverter; nominally 630mm. Not stopping...
K5 with Sigma 70-210 manual-focus, KA mount. Zoomed all the way out to 70mm plus Vivitar 3X KA mount teleconverter; nominally 210mm and looks it. Not...
K5 with Sigma 70-210 f/4-f/5.6 manual-focus, KA mount, at 210mm, ISO1600, f/4, shutter speed selected by camera (green button on manual) 1/8000 sec.



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