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I've built my own 3D printer so the only cost is the cost of the filament, about $20 per kilo.

Hi,

I'm out for a week so I can post any photos, but the paper bellow is just for test so I didn't reinforced the corners.
I'm going to make proper fabric bellow when I'll be back.

Hi,

A while ago I've decided to design and print large format camera.
The goal is to make 5x7 camera, but I've decided to make 4x5 first as it will allow to print some elements in single piece...

Rear standard is 30x30cm inside.
Focusing mechanism is simple rack&pinion gear. It's quite big, but works smooth and when locked is very stable.
I'm learning some more advanced woodworking and I...

I was rather thinking about $300-400 range to keep it affordable. This should be the started kit, with all the movements for those who want to try how it's to shoot LF. Shooting with x-ray film makes...

You've made me start thinking about this and maybe I should try?
How much do you think will be a reasonable price for such simple, but not crude camera?
I mean monorail, standards, back ready for...

Thanks for the kind words.
Interesting idea about making another for sale, but...
This was my first, more advanced wooden project I've ever made.
If I was able to do it then almost everybody could...

There is also OrthoCam for Android which I've created to help visualize effect of green or blue sensitive films. It also has light meter. ...

I can't compare because I've never used LF camera but mine, but with new wooden frames it's much sturdier. At least it doesn't have any problems with handling Zeiss Tessar 300/4.5 which isn't small...

My camera has new front standard and new focusing mechanism. It works much better now and yesterday I've took it out for a very first time.
This is how it looks in the field:
...

Yesterday I've took my camera out for first time and here is the result.

https://farm4.staticflickr.com/3941/15616382156_32e70d4d4e_o.jpg
...

This thing is a light meter :) Set the aperture, ISO and you are ready to use it. You can zoom to measure smaller part of the scene. It calculates the exposure for displayed frame.

Hi,

New v. 1.2

- added zoom function
- layout fixes
- faster refresh rate on high resolution screens

Hi,

I've published v. 1.1.

- added light meter function
- added touch on preview to set exposure area
- added portrait layout
- app now saves current state on exit

Light meter function...

As I've recently wrote very simple android app to show realtime simulated ortho film look I wonder about adding option to zoom frame to simulate coverage of different lenses.
Don't you think it will...

My first more or less sharp portrait made with large format camera. It's pretty hard to to keep children steady for 1-2s ;)
https://farm4.staticflickr.com/3937/15461804546_90a1a1cc1a_b.jpg

Unfortunately, as far I know there is no android phone with IR sensitive camera. I can only work on RGB image.
If you have IR filter which cuts visible light you can try to put this in front of you...

Well, adding shutter button is easy, but it involves some design decisions: image ratio choosing, focusing, exposure etc.
But I when I'll have some spare time for bigger project I think I could add...

X-ray shooters may be interested in my simple Android app which helps you to visualize how the scene will look using orthochromatic film....

Hi,

I've just published very simple app on Google Play which helps you to visualize how the scene will look using orthochromatic film.
You can enable/disable RGB color components to see how...

I had similar problem with no relief visible. The solution was to lower pigment concentration. Now relief on wet photo is very visible and still visible when dry.
Lower pigment concentration means...

It's fun to look how x-ray film handles the red color.

https://farm6.staticflickr.com/5590/15058167068_f3fd5d3c4b_o.jpg

Carbon print from 18x24 cm green sensitive Kodak x-ray film developed...

I've tried to point my red LEDs directly at the film at about 5cm for several seconds while developing and nothing happened. No fog at all.

I have small bathroom which works as my darkroom when needed and I can use only one Paterson developing tray for developing, stop bath and fixing ;) I've used very fine sandpaper to smooth tray...

Here in Europe I just order x-ray film in desired size over Internet.
It's cheap (about $30 for 100 18x24cm sheets) and you can develop by inspection which is really nice because you don't have to...

I've bought small, used face tanning unit from Phillips for about $20. It covers more than 8x10 and exposure times are from 2min for Kallitype to 8min for carbon printing using my glop. I just had to...

I was afraid of mixing pure soot with glop, but looks like one I buy in alt photo store works really nice. Just add some clear glop to powder, mix nice mud and add it to the glop. Actualy it's easier...

My first more or less successful print done without many fails, from fresh glop. Just one test print before to be sure glop is good.
...

If by standard you mean focal length close to film diagonal then it will be about 31" (800mm). This will be equivalent to about 43mm in 35mm film format.

But in this case film width is few times greater than height, so horizontal field curvature will be much stronger.

Maybe you could bend the negative? ;)
Then it will be much easier to fix the field curvature problem because you have panoramic format.
Ground glass could be made of acrylic so it should be...

Inspired by this thread and by my old wooden holder breaking apart I've decided to try to make my own 18x24cm holder for my diy camera.
I've made it using MDF board from broken photo frames and of...

https://farm8.staticflickr.com/7365/13949141017_e385273fb3_o.jpg

diy 18x24cm camera with diy film holder
Zeiss Tessar 210

https://farm8.staticflickr.com/7365/13949141017_e385273fb3_o.jpg

diy 18x24cm camera with diy film holder
Zeiss Tessar 210

Sky in second picture was that dirty in reality. It was about 30s exposure so clouds moved a little and it looks bit weird.
Your and David Chalmers YT videos made me thinking about trying this by...

After few weeks of trying different pigment concentrations, different sensitizer amounts and changing other variables I have some decent (at least for me) carbon prints.
It took me a while and about...

Chomium(VI) from dichromate is converted into chromium(III) after exposure and only this one will be say with hardened gelatin on the print.
Unexposed chromium(VI) will go to developing batch.
I'm...

Carbon print from x-ray negative:
https://farm8.staticflickr.com/7257/13533121953_8196684093_o.jpg

I've build my 18x24cm (bit smaller than 8x10) camera for about $100 and got two Zeiss Tessar's: 210/4.5 and 300/4.50 for about $50 each.
I use only x-ray film: about $30 for 100 sheets. I made my...

Well my first attempts are not as successful as yours.
My prints have way to much contrast and are completely flat without any trace of relief.
I think I have to use much lower amount of pigment....