Archived posting to the Leica Users Group, 2013/04/06

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Subject: [Leica] Nothing else for it
From: benedenia at gmail.com (Marty Deveney)
Date: Sat, 6 Apr 2013 23:12:42 +1030
References: <CABmfTOWLVPVF0XYrZ_D8gL9mwpeuORkn0qSyPHFZ0hp=T8EQZw@mail.gmail.com> <CD83F6D8.7A32%mark@rabinergroup.com> <CABmfTOWRnhE=x+=wkA1d=ZQmm+W_=sdOW_QieAmitXPi-nP0-Q@mail.gmail.com> <80F9701439F20347874CE5E4E03C22E9BD84FFCA@WHIZZMAIL02.whizz.org> <CABmfTOUrvFm7jTRjAZPoHORcUdE5jH4JpTrOVpxyLALc=Pz88w@mail.gmail.com> <F249FCFB-4B9A-4352-BDC1-B94700F91AA4@btinternet.com>

Yes, but the lowest limit of wobble in a bayonet mount plus the same in a
collapsible mount is still more wobble than in a rigid lens.  The two
samples f the 90 macro I've tested showed more optical decentring than
rigid 90 lenses.

Marty


On Saturday, 6 April 2013, Frank Dernie wrote:

> There is no reason why a  well engineered collapsible mount with a
> reasonable diameter bayonet lock inside, like the 90mm f4 macro, should be
> any more wobbly than a bayonet fixing lens to camera junction. Whilst
> expending between collapsed and locked , maybe - IME some are, some aren't
> - but when locked no reason to be wobbly at all.
> f4 -is- slow...
> FD
>
> On 5 Apr, 2013, at 23:47, Marty Deveney <benedenia at 
> gmail.com<javascript:;>>
> wrote:
>
> > Collapsible mounts are inherently wobbly, and f4 is much too slow...
>
>
> _______________________________________________
> Leica Users Group.
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>


Replies: Reply from mark at rabinergroup.com (Mark Rabiner) ([Leica] Nothing else for it)
In reply to: Message from benedenia at gmail.com (Marty Deveney) ([Leica] Nothing else for it)
Message from mark at rabinergroup.com (Mark Rabiner) ([Leica] Nothing else for it)
Message from benedenia at gmail.com (Marty Deveney) ([Leica] Nothing else for it)
Message from john at mcmaster.co.nz (John McMaster) ([Leica] Nothing else for it)
Message from benedenia at gmail.com (Marty Deveney) ([Leica] Nothing else for it)
Message from Frank.Dernie at btinternet.com (Frank Dernie) ([Leica] Nothing else for it)