Archived posting to the Leica Users Group, 2004/11/03

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Subject: [Leica] apo extender 1.4 question
From: Frank.Dernie at btinternet.com (Frank Dernie)
Date: Wed Nov 3 11:53:02 2004
References: <79.3782b8f3.2eba698f@aol.com> <019101c4c1db$d0449290$4649c33e@sypcom>

My old 280 f2.8 showed 3.4 when wide open on my R8. I had a ROM fitted 
when it was serviced, not it reads 2.8 as expected. I got the 
impression from Leica GB this is common with long lenses.
Frank
On 3 Nov, 2004, at 19:32, animal wrote:

>
>
>> For Simon, the apo extender-R 1.4 can, indeed, be used on several  
>> other
>> Leica-R lenses, according to Sartorius in his "Indentifying Leica 
>> Lenses.''
>>  He says that while the extender was "designed for specific use" with 
>>  the
>> Apo-Tely- R 280/2.8 to transform it into a 400mm/f4 Leica "does 
>> guarantee
>> excellent results'' with following other Leica-R lenses: the 
>> Macro-Elmar R
>> 100mm/f4, the Elmar-R 180mm/f.2.8, the Telyt-R 400m/f6.8 and the 
>> Telyt-R
>> 800mm/f6.3. The 800mm, Sartorius notes, would be transformed into a 
>> 1120mm/f8.8.
>>  He also says that Leica's illustrated brochures guarantee that if  
>> the
>> extender is used with the Apo lenses, there would be "absolutely no 
>> loss in  their
>> extraordinary optical performance.''  -- bob cole
>>
>
> Thanks for all your replies.
> I tried it carefully today with my 180 f2.0 and it fits without 
> hitting anything.
> Strangely though the aperture shown in the viewfinder is now 3.4 .
> I expected 2.8.Now that i,m at last developping my own film i,ll do a 
> ring around test and will check the true aperture of the combo as 
> well.
> best regards,simon jessurun
> amsterdam,the netherlands
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> Leica Users Group.
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>


In reply to: Message from Thinkofcole at aol.com (Thinkofcole@aol.com) ([Leica] apo extender 1.4 question)
Message from s.jessurun95 at chello.nl (animal) ([Leica] apo extender 1.4 question)