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Why our reviews don't measure transittance or T stop ?
(02-14-2020, 05:38 PM)davidmanze Wrote:
(02-14-2020, 05:25 PM)Brightcolours Wrote:
(02-14-2020, 02:22 PM)toni-a Wrote: Transmittance or T stop is very important mainly for lenses desiggned to be used in low light, you might pay plenty of extra $$$$ for a f1.2 lens over f1.4 lens for low light performance to discover that both are equal or worst the f1.4 lens has a lower T value and thus transmits more light 
can the transmittance be measured her in our tests ?? 
DXO is doing it so it is feasible

No, DXO is NOT doing it. DXO claims they do, but that is nonsense.
Their published T-stop values are just nonsense, and do not take into account the extra amplification a camera applies because of the F-stop used. Do I need to give examples, or will you accept me just telling you it is nonsense?

      No, go on BC explain it !!
What is the no to? To "Do I need to give examples"?

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RE: Why our reviews don't measure transittance or T stop ? - by Brightcolours - 02-14-2020, 06:32 PM

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