Category Archives: Diffraction limits

Bellows extension, exposure correction and diffraction


USING bellows or extension tubes for close-up photography moves the iris of the lens away from the camera reducing the amount of light reaching the film or the sensor. Quite literally, the further away the light at the end of … Continue reading

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Diffraction can wreck your photos


SMALLER apertures are often recommended as they increase the depth of focus (DoF) in a photo – and don’t we often want to get as much as possible in focus? Unfortunately, as the iris size gets smaller, the light waves … Continue reading

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Triplet vs Tessar


HERE IS the result of a quick test I carried out using an old East German Ludwig Meritar 50mm f2.9 triplet (three lenses in three groups) design and a Soviet era Industar 50mm f3.5 Tessar-design (four lenses in three groups). … Continue reading

Posted in Cameras, Diffraction limits, Digital Cameras, Equipment, Industar-50-2, Lenses, Ludwig Meritar 50/2.9, Photography | Tagged , , , , , , , , , , , , , , , , , | Leave a comment