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02-21-2016, 03:12 AM   #16
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QuoteOriginally posted by Digitalis Quote
I'll have to dig through my test data, but from memory I recall the transmission from that lens is somewhere in the vicinity of T=3.5
Yeah ! Thank you very much
Don't need to dig in your test data, i only needed an approximation, because i did some trial and error, but i wasn't sure of the results. Your answer makes me happy so far

Thanks again !

02-25-2016, 03:20 PM   #17
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QuoteOriginally posted by Digitalis Quote
I'll have to dig through my test data, but from memory I recall the transmission from that lens is somewhere in the vicinity of T=3.5
i did a shooting with some friends, long story short : the Pentax k-x with the DA*55 @f3.5 (same iso and speed) provide more or less the same result in luminosity than the p6x7 and the 105 @2.4. (tested on Ilford Delta 3200).

So thank you for the info which seems quite correct

It did allow me also to test an app from my phone that offer a "lightmeter" with all the problem of accuracy and angle of mesurement linked with any phone app withing the front camera. i know now, the ajustement i need to take in account.
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