Frame count method on Kodak No. 3 folder, 120 to118 roll?

[jay moussy]

I am toying with the idea of buying a Kodak No.3 folder from an antique shop - the horror! (a model M, a late one?)

Film was originally 118 size, so I plan on adapting 120.
Film gate is 3 1/4 by 4 1/4 inches.

What would be a good method to establish the film advance turn count?
Only thing I am thinking about is:
- use a spare backing paper, mark my frames ahead of time and spool that on empty 120.
- remove camera back, start rolling paper from 120 onto the original 118 spool
- count my advance knob turns as frames appear in the right position
.. and then apply a mystery corrective factor "x" to account for film thickness that was not present above!

Any other possible scheme?

 

[Disconnekt]

There is an adapter for using 120 film in cameras that originally took 118 film (here: https://www.camerhack.it/product/fak-118-120-to-118-film-adapter-kit/), and on the site it shows tips on how many turns for each photo (under "Film winding & frame numbering"), if anything that would be a good starting point to try & make minor adjustments to it

 

[Disconnekt]

Also, if you plan to use the adapter Film Photography Project has that adapter for $20 (here: https://filmphotographystore.com/products/adapter-118-to-120-film-adapter), shipping is cheap too

 

[jay moussy]

Thanks.
I am comfortable with my DIY adapting method with 116 and 616, so I can skip the commercial "printed" adapter and adjust for 118.

Only concern is frame count, so I can take keep an eye on the recommended figure (initial 16 half turns, then 5 half turns each) while attempting my proposed method and see if between the two, I get a reasonable match.

 

[BrianShaw]

1906 Kodak 3A

The Kodak No. 3A Model B2, which I have adapted, was made between 1904 and 1906 as far as I could determine from the available literature. It was a "Pocket Folding Kodak" but pockets must have been very big back then because this one measures (in inches) about 10 x 4-3/4 x 2. The No. 3A was one...

www.photrio.com

Your proposed methodology is sound and works. Make sure you have a consistent start point. I didn’t worry about space between frames as long as the first two don’t overlap. Using a consistent number of turns between frames reduces potential error. I’d rather reduce potential error than maximized a few millimeters of film.

 

[jay moussy]

Thanks Brian and others

Duh.. I cannot believe a related question to mine (120 length, count) was up this Wednesday and I did not notice!

Other: the shop where the No.3 is also has an Autographic and both have smooth shutters and clean lenses!