I need to make some refinements to the 3D printed adapter, but the initial prototype works well. https://mastodon.emory.coffee/media/JSLhkTDzqqFjupP6n04 https://mastodon.emory.coffee/media/_hPkDjlr__ItYUpKhrk
The next step is finding a new lens. The 85mm that came with it doesn’t have PC sync and my 150mm is too long.
I think I've settled on the design for the real adapter. The goal is for it to be easy to make, ideally in a single CNC run on the back side.
The 65 mm lens arrived so I was able to properly test the adapter. It's safe to say I do not have the sensor registered to the ground glass correctly 🙁
Using my professional-grade Sensor Registration Marking System (painters tape) I have a new offset of -3.5 mm.
Now to wait 3 hours for a new print. https://mastodon.emory.coffee/media/RM_Xsuzvps09NVEUE_0
After a couple of near misses I think I might have the correct registration offset. The current math says I need to offset the adapter _inside_ the body of the camera.
The adapter does indeed need to be inset by 0.8 mm. With one final print last night I was able to confirm that the registration is correct!
I painted the adapter “photo black” and the contrast in the images is definitely better.
Ideally it would be printed out of a black plastic or even metal. https://mastodon.emory.coffee/media/on_V4xY7cJcMISElnp0 https://mastodon.emory.coffee/media/Y-LOKXBjR5TwJwOv5oE
Just for fun, a quick recording of state of the art live view, circa 2008.
@emorydunn Oh, that’s a bummer. Do you have an idea of how far off you are?
@pjonori Looks like it's a whole 3.5 mm! It looks like both my measurements and assumption of how deep the sensor is were wrong.
@emorydunn Yikes! That's a decent amount in regards to optical engineering.
@pjonori It's certainly more than I was expecting. Of course I'm working entirely from measurements with no reference specs, so perhaps it's not surprising.
@emorydunn Seems like a major challenge. My statement was in no way intended to criticize - more to call out the frustratingly exacting precision needed for construction.
@pjonori No criticism taken. I'm gaining a new appreciation for camera construction. I have CAD and a 3D printer, I can't imagine doing all of this by hand.
@emorydunn I'm not going to lie, I'm following your project with a lot of fascination and appreciation.
I've always wanted to build a camera. Then I start thinking about how much goes into it and I need to breath into a paper bag.
@pjonori I'm glad other people can get something out of my pet project.
I'm constantly amazed at the DIY cameras people build. Though it's rare to see the process behind it.
I'm going to have to suffer through the "live" view on the back to figure out whether the adapter is too thick or thin.