Archived posting to the Leica Users Group, 2000/05/24

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Subject: RE: [Leica] 100 R Macro (was 60 Macro Elmarit-R)
From: "Ben Ho ^_^ (IFLJ)" <benho@longjohngroup.com>
Date: Thu, 25 May 2000 10:46:22 +0800

Hello,

I have been using the APO2X with 100/2.8.  The outcome is great and I can obtain 1:1 magnification.  (BTW, this is quite subjective because I have not compared this combo with the Elpro.)

Personally, I think the 2x is quite a good deal.  It doubles up the focal length of all my lenses and is very userfriendly if i want to travel light.


Best regards,
Ben




> -----Original Message-----
> From: owner-leica-users@mejac.palo-alto.ca.us 
> [mailto:owner-leica-users@mejac.palo-alto.ca.us]On Behalf Of 
> Anderson, Ferrel E
> Sent: Saturday, May 20, 2000 2:35 AM
> To: 'leica users group'
> Subject: [Leica] 100 R Macro (was 60 Macro Elmarit-R)
> 
> 
> Leica did not recommend the use of any device between the 100 APO lens and
> camera body, not even the 2X extender.  Since its advent, they do 
> recommend the
> use of the  APO 2X extender.  This leads to another question:  
> Can the APO 2X
> extender be used with the same optical performance as the 2x 
> extender on lenses
> which do not have internal focusing?   Or, conversely, does the 
> 2X extender
> result in acceptable performance on the internal focusing APO lenses?  My
> suspicion is that the APO 2X extender, and the APO 1.4X extender, 
> are designed
> for the internal focusing APO lenses, and the 2X extender is 
> designed for the
> non APO lenses (except for the 180 APO f3.4 Telyt) which use the 
> bellows effect
> for focusing.  Anyone know whether this is true?  I don't have any of the
> extenders, and, therefore, have no practical experience to draw on.
> 
> 
> Ferrel Anderson