Re: lens coverage, selection, cost.. was why Re: actual vs ratio sizes

[Robert Monaghan <rmonagha@xxxxxxxxxxxxxxxx>]

Thanks! the horiz and vertical measures would be interesting (and/or 
diagonal), esp. if we can get some comparative data from Nathan and 
others on the panorama-L list... ;-)

the Longfellow 6x17cm (or 18cm) joining the pair of Ensign 620s used the
older and cheaper 90mm f/6.8 angulon (not super); evidently, it hits 150mm
coverage wide open (and the 156mm format used in the camera nicely); the
builder was also president of the MPP large format group in Britain, if I
recall the article text correctly. From my camera hacking point of view,
the cheaper lens makes it economical to hack a panoramic camera with
greater coverage, so collecting such factoids and info on actual film 
gate sizes is handy ;-) 

regards bobm

* Robert Monaghan POB752182 Dallas Tx 75275-2182 rmonagha@xxxxxxxxxxxxxxxx  *
* Medium Format Cameras: http://www.smu.edu/~rmonagha/mf/index.html megasite*

On Mon, 3 Apr 2000, Ellis Vener wrote:

> All good arguments that I had not considered! Try writing the various
> manufacturers. As soon as I find a mm ruler I'll send you specs for my
> V-Pan mark III. Do you want the film gate diagonal as well. You of
> course are aware that published specs for image circles are often
> conservative. And are talking about the older 90 mm f/6.8 Angulon or the
> current or original version of 90 mm f/6.8 Super Angulon? Three
> different lenses with different specs.
> 
> Ellis