DIY Open Source Field Camera Design

[Joe Smigiel]

It's probably obvious to most, but scaling down or up between different formats is not going to be equal in all three dimensions. Thickness and weight are going to be factors with the materials to be used, so a simple scaling in the XY plane will very likely be different than the remaining third dimension.

Film holder specifications for different formats are a good example of this.

Just thinking aloud...

[Joe Smigiel]

I agree, use published data. 8x10 is a well known size, ULF can differ.

Single Measurements are often crude and inaccurate.

You will never get us to measure 100's of them for a statistical study.

Agreed. Here's some measurements and data I made or gathered from the web for whole-plate holders. They are all over the place.



I would strongly recommend obtaining the actual ANSI specifications for 8x10 holders and going with that. Somewhere I have a copy and I'll look for the numbers. (The derived one illustrated on the web is not accurate.) In any event, I think the cost of the actual ANSI document is something like $35 and it contains all the other standard large formats (except whole-plate). IIRC, I think it went to up to 14x17 or 16x20 as well.

[Daniel Moore]

I found this quick little weekend project very inspiring:

https://www.behance.net/gallery/1269...-of-Jirkon-4x5

[brandon allen]

I would strongly recommend obtaining the actual ANSI specifications for 8x10 holders and going with that. Somewhere I have a copy and I'll look for the numbers. (The derived one illustrated on the web is not accurate.) In any event, I think the cost of the actual ANSI document is something like $35 and it contains all the other standard large formats (except whole-plate). IIRC, I think it went to up to 14x17 or 16x20 as well.

I just searched and browsed through the ISO and ANSI websites and cannot locate the relevant standard. I located the specs for the sizes of sheet film: DIN ISO 1012:2000, but not the film holders. And the prices for various documents ranged from about $80-$300.

Can somebody help here? Joe if you have it, that would be fabulous!

[brandon allen]

I agree, use published data. 8x10 is a well known size, ULF can differ.

Single Measurements are often crude and inaccurate.

You will never get us to measure 100's of them for a statistical study.

Ok, can you supply the needed specs?

I can't.

[Jim Jones]

I found this quick little weekend project very inspiring:

https://www.behance.net/gallery/1269...-of-Jirkon-4x5

Having occasionally made small metal parts with basic tools, I'm impressed by Jirka's skill. One suggestion: long slots in aluminum can be made on a table saw with a fence. Exercise care both for results and for safety.

[Joe Smigiel]

I just searched and browsed through the ISO and ANSI websites and cannot locate the relevant standard. I located the specs for the sizes of sheet film: DIN ISO 1012:2000, but not the film holders. And the prices for various documents ranged from about $80-$300.

Can somebody help here? Joe if you have it, that would be fabulous!

ANSI IT3.108 1998 Edition, April 28, 1998
Photography (Cameras) - Double Film Holders (Lock-Rib Type) - Dimensions

Here's the page:
https://global.ihs.com/doc_detail.cf...put_doc_title=

$25 but it looks like it is no longer available through this source.

Here's another possible way of ordering it though I don't know if the cost would be the same.

ANSI/PIMA IT3.108-1998, Photography (Cameras) - Double Film
Holders (Lock-Rib Type) - Dimensions (withdrawal of ANSI/PIMA
IT3.108-1998)
Order from: ANSl
Send comments (with copy to BSR) to: James Peyton, I3A;
i3astds@i3a.o

I'll look for my long lost copy.

[barnacle]

I found this quick little weekend project very inspiring:

https://www.behance.net/gallery/1269...-of-Jirkon-4x5

It's people like that who make us up our game... I bet that took more than a weekend!

[Jerry51]

Hello guys are we getting any closer to camera design i'm getting anxious to build my 8x10 field camera and I'm not getting any younger.
Thanks

[barnacle]

Just collecting possibilities:

Delrin racks, in a couple of sizes: I prefer the smaller 0.5 mod. http://www.motionco.co.uk/racks-plas...-32_42_71.html
Matching delrin spur gears: smaller the better for precise focus: http://www.motionco.co.uk/spur-gears...-32_33_34.html

Both very reasonably priced but delrin can be a devil to glue to anything.

Neil