Archived posting to the Leica Users Group, 2009/09/06

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Subject: [Leica] T-adapter for Leica M?
From: hlritter at bex.net (Howard Ritter)
Date: Sun, 6 Sep 2009 19:43:19 -0400
References: <EEF4B5A6-A66E-48BC-879A-71CF85400637@frozenlight.eu> <2613566EA4644F44BA30F068F86DA35C@jimnichols> <8AA86252-5445-480B-8B4B-AF3A7757E868@bex.net> <4AA3E714.1030305@panix.com> <p0623091cc6c9e69cd1a6@[10.1.16.145]>
 
Thanks, Henning.
With H-alpha at 656 nm, I don't need to actually get into IR. I think  
the problem with DSLRs and astrophotography is that the IR-cut filters  
intrude into the deep-red part of the spectrum.
I'll look into the T-to-R-to-M possibility. Thanks.

?howard


On Sep 6, 2009, at 6:26 PM, Henning Wulff wrote:

> The visoflex T-adapter would have the wrong register. You can,  
> however, get a Nikon or Leica R T-adapter and then Nikon or Leica R  
> to M. I have never seen a T-adapter for Leica M directly.
>
> The M8 has decent IR sensitivity, but it still has a weak IR filter.  
> A modified Canon or other camera with the IR filter removed has  
> about 3 stops more sensitivity to light of about 720nm.
In reply to: Message from photo at frozenlight.eu (Nathan) ([Leica] Nathan's PAD 05/09/2009: the mean streets of Perpignan)
Message from jhnichols at lighttube.net (Jim Nichols) ([Leica] Nathan's PAD 05/09/2009: the mean streets of Perpignan)
Message from hlritter at bex.net (Howard Ritter) ([Leica] T-adapter for Leica M?)
Message from shino at panix.com (Rei Shinozuka) ([Leica] T-adapter for Leica M?)
Message from henningw at archiphoto.com (Henning Wulff) ([Leica] T-adapter for Leica M?)