Anyone have any idea how Pop Photo measured flare ?
> alias@xxxxxxxxxxxxxxx <alias@xxxxxxxxxxxxxxx> wrote:
>
> The lab measured flare in the 35-70mm f/3.6 Zuiko seems to me to be
> well
> controlled, as measured by Popular Photography. In the text
> accompanying their review of the OM-2S/35-70mm f/3.6, they said: ". .
> .
> use of the hood results in a 20-percent reduction in flare level.
> (The
> test figures in this report were obtained with the hood in place.)
> Multilayer coating and good blackening, except for one rear edge,
> also
> helped keep the flare levels respectably low."
>
> They reported for percent flare:
> at 35mm .65
> at 50mm .9
> at 70mm 1.05
>
> in comparison:
> 50mm f/1.8 SC .86
> 35mm f/2.8 SC 1.1
> 100mm f/2.8 SC 1.55
> 24mm f/2 .6
> 40mm f/2 1.0
> 100mm f/2 .65
> 50mm f/2 .42
> 35mm f/2 lastest version .24
>
> 35-70mm f/3.5~4.5
> at 35mm .5
> at 50mm 1.05
> at 70mm 1.05
>
> 35-105mm f/3.5~4.5 early version
> at close focus 1.35
> at 35mm 1.55
> at 70mm 1.45
> at 105mm 1.6
>
> Someone posted the assumption that the latest "Meade Green" Zuiko
> multicoating is the best multicoating Olympus offered, hence the
> 35-70mm
> f/3.6 couldn't be up to present standards. I'm not necessarily in
> agreement. No one has tested that assumption and a counter argument
> can
> be made that it is a less costly multilayer coating than variations
> used
> in the early 1980s.
>
> Gary Reese
> Las Vegas, NV
>
>
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>
Wayne Harridge
http://members.optusnet.com.au/~w_harridge
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