Category Archives: Tech Talk

Canon lenses- Resolution Versus Aperture

When Reikan Technology’s FoCal application was recently updated to provide support for the Canon EOS R, it opened up a whole new avenue to test lenses for aperture sharpness. Since the EOS R is mirrorless, and its focusing pixels are … Continue reading

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Noise Reduction – Canon EOS R

I recently purchased a Canon EOS R and noticed that there were provisions there for high ISO noise reduction, just as there were in my previous Canon 5D MK III and 5D MK IV cameras. As I had never used … Continue reading

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Color Gamut – Epson Ultrachrome K3 vs HD Inks

I recently purchased an Epson SureColor P800 desktop printer.  Since it features the new 8-color Ultrachrome HD inks that are claimed to have a wider color gamut [the entire range of colors that can be produced by a given device] and … Continue reading

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Noise Test – Canon 5D Mk IV

In a previous post, Exposure Recovery-How Much Is Possible, we explored the result of under and over exposing an image at ISO 400 by 5 stops without any adjustment.  Then we looked at the result of trying to recover these  … Continue reading

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Exposure Recovery – How much is possible?

 In a previous post, Dynamic Range Test – Canon 5D MK IV, we illustrated that 8 stops appears to be the practical dynamic exposure range of a current well-regarded DSLR camera. Now we wish to take a look at what … Continue reading

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