[LargeFormat] Gundlach 12" Radar in #5 Betax

[Ken Hough]

The (spacer) threaded bushing was done so that huge barrels outer diameter 
could be done. I just put a lens spanner in it and turn.  I have a lathe to hold 
the body of the shutter in.  All the ones I have are like that too.
By the way 1/50 top speed is a dream. if you adjust the 1 sec time the fastest
1/50 goes is 1/25. If you adjust the 1/50 so its correct, 1 sec is 1/2 sec.
I have several BRAND NEW Betax 5s. Every one is like that. 
Ken

From:           	"Clive Warren" <mobilton@hotmail.com>
To:             	largeformat@f32.net
Subject:        	Re: [LargeFormat] Gundlach 12" Radar in #5 Betax
Send reply to:  	largeformat@f32.net
Date sent:      	Mon, 31 Dec 2001 12:23:56 +0000

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>From: "Don Feinberg"
>Date: Sun, 30 Dec 2001 23:47:57 -0600
>
>I have one...
>
>----- Original Message -----
>From: "Clive Warren"
>
> > Does anyone have a Gundlach 12" Radar lens in a #5 Betax shutter? > I 
>have some questions about how the elements are spaced and held in > the 
>shutter!

Hello Don and Ken,

Good to know that you may both be able to help me!

I recently acquired the lens and am hoping to use the shutter with other 
lenses in addition to the 12" Radar. The Betax #5 shutter seems to have two 
spacers that the lens elements screw into. The rear elements unscrew from 
the shutter together with the rear spacer. The front elements unscrew from 
the front spacer but the spacer itself seems to be well and truly mated with 
the shutter - ie I cannot remove it. I do need to remove the spacer as the 
shutter needs a bit of TLC - only a few screws to tighten under the shutter 
front plate. The front plate will not pass over the front spacer so that 
spacer has to be removed.

On close inspection of the front spacer it seems that there are four holes 
that have been filled in on the inner diameter at the top. I cannot imagine 
that these would be for holding screws as the front spacer surely is screwed 
into the front of the shutter?

Anyway, before applying any real force to the front spacer in an attempt to 
unscrew it, does your 12" Radar have a similar spacer and does it unscrew? 
Are there four filled in holes in the top of the inner diameter of the 
spacer?

Cheers,
       Clive



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        ******Ken Hough Photographic Repair******
         Specializing in Deardorff Refinishing
          Lens Recementing and Shutter repair
          Contribitor to McKeowns Price Guide
                   Deardorff Section
           Custom machined Photographic items
           Text Contents Copyright 1999 KHPR
          http://deardorffcameras.0catch.com/
                   Est. 1980