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    Re: DIY 8x10 (or larger) Enlarger Chassis

    I'm only planning on doing VC printing myself, but in theory it should work for color as well. Remember that the green hue created by a color head and RA-4 paper is not determined by the frequency of...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    I didn't get started on the electronics yet, as I decided to re design the light source a bit. My new design uses less expensive and slightly less powerful LEDs, but more of them allow for more even...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    I just finished modeling screw/bolt holes, and adding other bits and pieces that were missing from the design. I'm using almost all 1/4-20 screws, with the exceptions being mounting bolts for the...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

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    I think the design is nearly complete, at least the basic parts of it. Now comes the slightly less exciting (to me, anyway) part of figuring out all the details like...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    That definitely is a great way to get into enlarging 8x10, but I’ve already got a wall mount 8x10 enlarger, and am designing this as an upgrade to that.

    On another note, I’ve seen that video as...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    Ic-racer is correct, there aren’t any counterweights. Each stage has rollers which should keep any sideways torque off of the lead screw, so the only force on it will be the downwards force of...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    Made a few more changes. While driving home from work today, I realized that the table never needs to go above ~30 inches, and the lens stage never needs to be more than ~600mm from the negative...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    whole plate is a full 1.5 inches larger in both directions than 5x7. Most 5x7 enlargers won't have a large enough light source to cover that. I think it will be a lot easier to just get an 8x10...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

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    Added some more struts to the design
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    you may be right. There are 2 1x2" extruded aluminum beam which go back into the column that the head is attached to. I think that may be sturdy enough, but it couldn't hurt to add a triangular brace...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

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    Some more images of the enlarger, now with the head and lens stage finished. I'm fairly confident the cantilevered weight of the stages is well enough supported in this current...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

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    Some more in progress renders
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    I was aware durst had made some similar mechanisms, but I hadn't been able to take a close look at them, so thanks for those images! is that an oiling port on the side?

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    This is my design...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    I've made some changes to the enlarger chassis design. I was inspired by seeing the heiland enlarger which was announced yesterday to make all the movements of my enlarger motorized, like they have...
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    Heiland 8x10 enlarger

    Saw this on Instagram this morning.

    https://www.instagram.com/p/CTEy3xkIYrY/?utm_medium=copy_link

    Don’t know what the price will be yet, though a friend of mine heard a rumor that it will be...
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    Re: Film, etc. from Japan

    Kumar... I just read that Fuji is stopping sales of Velvia 100 in the US due to one of the chemicals being banned. Will you still be able to sell it to us from Japan?
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    Update-

    I've made a lot of progress on the arduino code for the control unit, it's almost done I think. If you want to check out the code, you can test it out using this simulator here:
    ...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    So... more thoughts on the info from my last post.

    I've learned that there's no simple conversion, since color filters don't apply evenly or linearly to the light source, and the (usually...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    I'm working on writing the code for the color controller. I want to have two modes for CMY and RGB color, because RGB is more useful for black and white in my opinion, but CMY is the more traditional...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    lol, I'm famous!


    https://www.youtube.com/watch?v=18hkA5nN3ag
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    In working on the timer, I spent today figuring out the math behind f-stop printing. I compiled my equations in a Desmos (online graphing calculator) graph, which you can look at here:
    ...
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    Re: Can the Devere 507 be converted to the 5108?

    a Rodagon 300mm for 8x10" negatives. The goal is making 32x40 prints possible, and the path I'm currently looking down is to build a new Chassis, which I've posted in the DIY section
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    Hah! though somewhat true I suppose, my main passion is shooting the photographs, not making the equipment. I do enjoy designing and building things, but after a few of the same it starts to get...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    Here's the finished chassis design. It's looking like the chassis will cost $1900 to build, which is a bit more than I had been hoping for, so I might fiddle around with it some more and see if I can...
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    Re: Looking for some help on Enlargers

    Just called the beseler 810. It’s not made anymore and can be hard to find. I think there’s also a guy in Europe who makes a simple led cold light conversion. If you’re up for som diy electronics,...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    Looks good! The black anodized aluminum definitely looks nicer than the plain, if it wasn't more expensive I would definitely use it for my enlarger design.

    How are you planning on controlling...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    I am planning on using t slot extrusion for the chassis. The thought on galvanized steel ducts was about processing tubes for large prints
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    Re: Rare lens maybe only exists in catalog

    what kind of shutter is that? Do you know what it's maximum aperture size (in mm) is? I'm curious if an aerial lens could be mounted in it
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    I wonder if galvanized steel would work for tubes? I'll probably just buy some to test with. a 12" wide duct sealed with some epoxy and a cap on either end should work I think, as long as the...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    I was going on the assumption that however I processed the large paper it would require a large amount of chemistry, but your drum thought has intrigued me. Are they just wide diameter pvc tubes?
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    for pvc pipe ones, are you thinking of just a drum the print goes in? A drum with a circumference large enough for a 30x40 sheet would take up a lot of space, so my thinking is that by spiraling the...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    My concept for processing paper, which is another thing I'll need to do some tests on, is to make a sort of developing reel. Inspired by the reels used for processing roll film. It would hold the...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    While that is a definite possibility, if I can make a rigid enough system myself, I would prefer to do that. I'm not sure it's a great reason but I would like to have a cohesive system, rather than...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    I'm trying to make it as compact as possible while still being a full size enlarger. Horizontal enlargers would take up too much space in my opinion.
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    If you're able, I would love to see some images of how you built yours. One of my concerns is that the column design I have won't be rigid enough, it's made from aluminum extrusion, but I'm...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    My goal for print size is 32x40. I don't imagine I'd print many that large, not too many people have the room for something like that in their house, but it'd be cool to have a few for myself in my...
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    Re: DIY 8x10 (or larger) Enlarger Chassis

    I saw that post when looking to see if anyone had a lower chassis. That was around the time I got my first 8x10 camera, and I only joined the forum a couple months later. Sometimes my timing isn't...
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    DIY 8x10 (or larger) Enlarger Chassis

    I have a DeVere wall mount 5108 I use for printing my 8x10 negatives, but I've always sort of wished it was a floor standing model. Recently I've been doing some research into converting it to a...
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    Re: Can the Devere 507 be converted to the 5108?

    hah, yeah. I don't know if I'd trust him to disassemble it, given that he sells all manner of things and doesn't specialize in enlargers
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    Re: Can the Devere 507 be converted to the 5108?

    That's one of the ones I was looking at, but apparently because it is more than 8 feet tall freight shipping isn't possible, despite what the post says
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