Re: Saltzman enlarger has arrived

In article <1eist3pmgrbap8orv4s1f260u8581ent7s@[EMAIL PROTECTED]
>,
John  <use_net@[EMAIL PROTECTED]
> wrote:
>On Sun, 16 Mar 2008 18:07:01 -0700, "Richard Knoppow"
><dickburk@[EMAIL PROTECTED]
> wrote:
>
>>The latter was mostly made for aerial mapping from
>>10x10 negatives.
>
>Just a little question about this as the previous owner of my D138 was
>working in this field. How fast do they usually fly and at what
>altitude ? I'm pretty sure he told me they were using 5" roll film for
>this.

I thought aero film for mapping was 10" or 5" rolls, giving a 4 3/4" or
9" square negative?

The diagonal of 9" square aero format is a little smaller than the
diagonal of 8x10" sheet film which is, supposedly, why some lenses
designed for mapping work, such as the Metrogon, do not really cover
8x10.

-- 
  Thor Lancelot Simon	                                    
tls@[EMAIL PROTECTED]
  "The inconsistency is startling, though admittedly, if consistency is to
   be abandoned or transcended, there is no problem."	      - Noam Chomsky