Archived posting to the Leica Users Group, 2004/11/05

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Subject: [Leica] LHSA convention cluster bombs Part One The Beginning.
From: Frank.Dernie at btinternet.com (Frank Dernie)
Date: Fri Nov 5 00:12:19 2004
References: <BDAFCD50.9934%mark@rabinergroup.com>

I don't think that the fact that some makers wrongly mark lenses is a 
fault of the definition...
Perhaps just the lack of a legally supportable standard definition.
Frank


On 4 Nov, 2004, at 20:13, Mark Rabiner wrote:

> On 11/3/04 10:59 PM, "Slobodan Dimitrov" <s.dimitrov@charter.net> 
> typed:
>
>> I wouldn't go so far as to say that APO is a term projecting absolute
>> quality. It's more in the line of a relative value.
>> It's my understanding that apo lenses focus all the color sources at a
>> specific focus distance set by the manufacturer. The other ranges, 
>> more or
>> less, work like any other optic.
>> I'll gladly stand corrected if I'm wrong.
>> S. Dimitrov
>
> To me there are two definitions of APO.
> One for the better lens design companies and one for the unwashed 
> masses.
>
> For Leica Hasselblad etc it means they've really lined all three major
> colors to hit the same film plane at the same time with a tele lens.
> Otherwise apparently not even considered. They'd just go for two.
>
> For Tamron (My spell checker insists it's Tampon) or what ever 
> companies
> you'd call the unwashed masses (I'm Bullish on Sigma) the definition 
> of AP0
> is:
>
> It cost $199 instead of $99 and it's not a total piece of junk.
>
> It's ok to use in public.
>
> Somewhere in the lens assembly there is a part not made of plastic.
>
> And the glass is real glass not acrylic.
>
> Real nice typography on the lens barrel. They hired a graphic artist 
> who
> does it full time.
> :)
>
>
> Mark Rabiner
> Photography
> Portland Oregon
> http://rabinergroup.com/
>
>
>
>
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>


In reply to: Message from mark at rabinergroup.com (Mark Rabiner) ([Leica] LHSA convention cluster bombs Part One The Beginning.)