[photo-3d] Re: "Euro" heat seal

["Charles (Chuck) Holzner" <cfholzner@xxxxxxxx>]

--- In photo-3d@xxxxxxxxxxx, Paul Talbot <list_post@xxxx> wrote:
> "Charles (Chuck) Holzner" wrote:
> 
> > I have found that cutting the film right is the most important
> > operation.  When cut properly the chips will fit well and align 
well.
> > 
> > Would sure like to find a source for euro heat seals mounts.
> > Developers please take note.   --Chuck
> 
> Chuck, you might want to carefully re-read your own message!  ;-)
> 
> You see, there is not one "euro" format.  Image size of all the
> various 7P cameras was somewhat different.  Contrast that with the
> 5P format for which there exists an ANSI specification for film
> size and mount dimensions.  (Not that any of the mounts on the
> market actually conform to the mount spec, but that's a different
> issue.)

I believe that what you are saying is that since there is a ANSI 
standard for 5P, you can cut film at the standard 5P intervals (5 X 
4.75MM = 23.75MM) and the chips will fit a mount made to that 
standard, therefore a heat seal mount with tabs exists.

Also, that a standard for 7P does not exist and that cutting the film 
every 7P (7 X 4.75MM = 33.25MM) will not work for all euro cameras.  
I will buy that; inorder to have a standard for 7P a standard must be 
developed and followed, and it wasn't, now it is too late.  I only 
have one "7P" camera and so didn't run into the differences.

> 
> You've pointed out that "cutting the film right is the most 
important
> operation."  How should the users of all the different 7P format
> stereo cameras (not to mention users of full-frame twin rigs and
> RBT cameras, who also use "euro" format mounts) cut their 
film "right"
> to successfully complete this "most important operation?"
> 
> RMM expects to carry a 7P heat seal mount in the future.  We will
> do so after we are satisfied that we have designed one that is
> sufficiently flexible to easily accommodate the variety of cameras
> producing images wider than 5P.  One of the many beauties of the
> Spicer lineup is that cutting the film is not the most important
> operation.  The tab-free design really is the best choice for wide
> format stereo images.
> 
 I find that the mounting tabs on the 5P heat mounts are a great 
help, when I have 3 rolls of 29 each I can mount them in one evening 
without staying up all night or spending a weeks pay on mounts.  If I 
carefully cut the chips squarely at 5P intervals they fit quite well 
and I can mount better then Kodak.

I do not shoot my FED much because, lacking heat seal mounts, I use 
the RBT mounts.  They are great mounts and I like them but they are 
expensive.

Since the 7P cameras use the same film as the 5P Realist format 
cameras the height of the chips should conform to the ANSI Specs.  
 You could put in the Vertical centering tabs and leave off the 
horzontal centering tabs, I can set the window when I check it before 
sealing.
You may want to make a couple of different window widths just as RBT 
does for their other 7P width and maybe the 8P format (no standard 
either?).  
I would like to test some in 23 X 28MM.

Thank you Paul,

Chuck



> Paul Talbot