Using and Modifying the Travelwide 4x5 camera

[plywood]

About loupes. I often have used a 50mm lens, looking through the front. Just move it back and forth until you see the ground glass surface clearly, I think it would be about 5X at that point. My magnifiers are 'as found' and I've also have a 80mm viewing lens from a wrecked TLR. For even closer I use a 34mm lens that was a projection lens from a microfilm reader. The plastic calbration screen does not have a very fine surface so the hi mag 34mm lens is not of much use. The 80 seems about right for this screen.

[Jac@stafford.net]

I am a bit surprised that no one suggested aerial focusing.

[fatcontroller99]

Tried my zacuto video viewfinder for kicks, view was pretty clear, but 3x not quite enough to get that fine control.

[Tin Can]

Aerial focusing thread as I was unfocused...

http://www.largeformatphotography.in...l=1#post433645

[plywood]

I wanted to have the option of a longer lens so I built an extension back out of plywood and foam core so I can use an old Kodak 130mm f7.7, seems to cover ok, even at infinity. The film plane sits back 41mm from the TW and balances well and only weighs about 5.4oz.

[Drew Bedo]

Plywood: Pictures? This approach will open up the TW to the use of lenses out to perhaps 150mm . the limit will be weight, balance and handling I think.

Perhaps someone will develop a 3D printed extension series of rear extensions.

[plywood]

Pictures.....yes ok, never have done that but I'll try. I'll ask the missus to help, she is the computer savvy one in the family.

Should also mention that this back is 'universal' with the foam core insert cut to length that depends on the lens FFD. That depth would have to be at least 120mm for my design to work. If a lens has a FFD between say 100 to 119 mm it would be hard to get my extension back close enough to focus to infinity. Clear as mud?

[Kuzano]

I think this would lead to a 3d printed set of adaptors for 120 and 150. OK getting too complex. But I have a computer client who makes bicycle parts CNC and I have talked with them about cutting a back that will mount a Graflok set of mounts for my roll back and Fuji Quickload holder.

Hoping to get a shipping track notification soon for my two TW's

[Ben Syverson]

CNC is the way to go for something like this. Exciting! I'd love to see some photos.

[Drew Bedo]

I only have a vague knowledge of this stuff but . . . .it is my understanding that it is possible to have a 3D CAD file printed in aluminum now by consumer oriented companies.

Have I got that right?