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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

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  1. Roy C

    Canon or Sigma lens ?

    Just to add to this, you do need to have the right type of extension tube. I have a set of tubes which has a square aperture and a Canon 1.4x tc will not fit in the aperture. I believe Canon tubes are OK though.
  2. Roy C

    Canon or Sigma lens ?

    Canon converters only fit certain Canon lenses because of a protrusion on the converter. I think the only lenses they fit are primes 200mm and longer plus the 70-200 series and the 100-400. You can, however use non Canon converters like Kenko on almost any lens as this does not have the...
  3. Roy C

    Canon or Sigma lens ?

    I am very interested in this Pete, could I ask which tc you are using please. (I used to use an old Kenko Pro 1.4x several years ago with the Canon 100 non IS lens and IQ was always good but I no longer have the converter).
  4. Roy C

    Canon or Sigma lens ?

    I upgraded from the Canon 100mm non IS to the Canon 100mm IS version and have been delighted with the results. Not only is the IS version a lot easier to hand hold but IMHO it also give better IQ. When shooting at 'macro' distances the IS version delivers around 1.5 - 2 stops of IS which when...
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