report on the 'ring artefacts' exhibited in some photomicrographs
by Klaus Henkel, Germany
Micscape Editor's note: Klaus Henkel has carried out an interesting study of the 'ring artefact' problem which can be encountered when using the Nikon Coolpix 900, 995 and 4500 consumer digicams for photomicroscopy. He has prepared an illustrated report of his findings and conclusions which the author has kindly allowed Micscape to mirror.
It is in Adobe Acrobat® 'pdf' format in both English and German. Right mouse click the link below to save to your PC, where it can be opened and read in Acrobat Reader®. This software is freely downloadable from Adobe's web site if required.
'Artefacts in photomicrographs' by Klaus Henkel. (pdf format, size 411 kbytes).
All comments to the author Klaus Henkel are welcomed.
'An imaging problem with digital cameras' - an article by Paul James discussing the 'ring artefacts' exhibited by the Minolta F300 digicam when used for photomicroscopy.
A recent sci.techniques.microscopy newsgroup discussion of the 'ring artefact' problem by microscopists prompted by the author's report.
Gordon Couger's and Brian Olson's web article '990 995 Coolpix shootout' on Gordon Couger's website.
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