Re: actual vs ratio sizes

[Ellis Vener <evphoto@xxxxxxxxxx>]

i think trying to do such strict measurements will be fruitless. The
Horseman 6x12 cm film gate is different in size from the Linhof and both
are different from the size of the Noblex film gate. And the V-pan 6x17
cm film gate is going to be different from the Art Pan, Fuji and Linhof
gates, much less the Noblex and homemade 6x17 backs made from old Navy
"torpedo" backs, plus we are all still waiting to see what the 6x17 back
from Canham will look like. I think the best you can do is make the
rough assumption that 17 cm means 17 cm, 12 cm means 12 cm, etc. I think
none but the most anal of us are all that concerned with the actual
dimensions of the film gate on a specific camera or film back. meanest 

Ellis Vener

Robert Monaghan wrote:
> 
> I would like to extend my actual vs ratio size table on my medium format FAQ
> pages at http://www.smu.edu/~rmonagha/mf/mffaq.html, but before I do so,
> I wanted to confirm that 6x12cm is really 2:1 based on 55mm (56?) x 110mm
> or thereabouts, and 6x17cm is really 2.83:1 or 55mm x 156mm etc. Since
> the "6cm" is really 55mm or 56mm long, then the longer axis has to be
> less to keep the (printing) ratio. But I want to verify this assumption!
> 
> Are the formats of the Fuji 6x17cm the same as the Linhof 6x17 etc.? 6x12?
> 
> Thanks! it is a bit counter intuitive that 6x12 is really 11 cm long, or
> that 6x17cm is really 15 1/2 cm long etc.
> 
> regards bobm
> 
> * Robert Monaghan POB752182 Dallas Tx 75275-2182 rmonagha@xxxxxxxxxxxxxxxx  *