September 12, 2015 at 10:45PM

0

More help needed: D mount lens for 8mm cam adapt to M4/3

Among the multitude of old-ass lenses I bought from ebay, I bought two D-mount lenses (a 13mm prime and a 1 1/2"? prime) meant for 8mm cameras. I could not find a D-mount to Micro 4/3 adapter, so I got a D-mount to C-mount little thread ring, and a C-mount to M4/3 adapter. I'm not great at reading descriptions so I got a "super slim" model that's a pain to put on my camera and I'll definitley be getting another one.

So I get my lens all jerry-rigged to my camera. The 13mm has a good amount of vignetting, but I can probably crop some of that out if I shoot in 4k. The 1 1/2" covers the sensor quite nicely.

On both of them though, they act like macro lenses. They'll only focus extremely close to the camera. The 13 doesnt even have a focus, just an aperture ring. The 1 1/2" focuses only like a foot in front of the lens.

Is anyone knowledgeable enough with lens mechanics to help me get a further focus? Is it just lens and sensor spacing? Do I need different adapters or maybe some type of speedbooster/reducer? Or is this going to work at all?

On a cooler note, I discovered I could invert the 13 and put it right up to the 1 1/2 and get some extreme macro. So if nothing, I have myself a nice macro setup I can put to good use.

3 Comments

If you can't get infinity focus it means your lenses are too far from the sensor, so you need to find a way to bring them a little closer. With an 8mm lens I imagine that we are talking about bringing it only a few millimeters closer to the sensor. ( with the 1.5 inch lens this might be as much as 12mm closer to the sensor )

...Oh and by the way, here's a link to a low cost custom D-mount to Micro 4/3 adapter.

http://goo.gl/NlWEgP

September 13, 2015 at 3:20PM

0
Reply
Guy McLoughlin
Video Producer
30541

Thanks Guy! only problem is this lenses are basically touching the adapter. They aren't, I'm not that stupid, but they're super close. 12 mm closer isn't an option. I'll play with it a bit, and check out that link.

Torsten Pearson

September 14, 2015 at 12:17AM

Yeah I think I'll order me one of those adapters and see what happens. Thanks again! I'll give you a shout out in one of my movies for all your help figuring out my camera.

Torsten Pearson

September 14, 2015 at 12:19AM

Your Comment