New 75mm Hypergon Lens

[Mark Sawyer]

So one needs to have two air bulbs with hose to make an exposure with this lens? One to blow the little fan on the front and the other one for the Packard shutter?

You'll need one air bulb to blow the little "fan", and a second bulb or cable release to release the little fan to fall away during the exposure. With an angle of view that wide, reaching in to release it would put your hand in the image. A Packard shutter would require yet another air bulb, so up to three separate releases.

[Kiwi7475]

So glad I have three hands

[Hugo Zhang]

I use a sinar DB shutter rather than a packard shutter so only one air bulb is needed.

I would love to see a video to show how you use a Sinar DB shutter with this lens. Does the shutter front have enough clearance for the lens rear element?

[rayfor]

I would love to see a video to show how you use a Sinar DB shutter with this lens. Does the shutter front have enough clearance for the lens rear element?

Here's a photo showing how this work. I made a flange to mount the lens diretly onto shutter thread rather than lensboard. There's enough space on both sides.

[Hugo Zhang]

Here's a photo showing how this work. I made a flange to mount the lens diretly onto shutter thread rather than lensboard. There's enough space on both sides.

I see you flipped the Sinar DB shutter over and used the thread on its back to mount your lens. Clever as you can't mount this lens on the front without an adapter which would add more space and probably block the lens coverage.

[rayfor]

Update 2023-07-24

I've made two sample, sandblasted(Fig1 Upper Left) and raw surface(Fig1 Bottom Left), with anodized color.

It seems the one with raw surface looks better, even better than the original hypergon(Fig1 Bottom Right)



It's not easy to mount hypergon on any shutter, even sinar db shutter would block some light when shoting 8x10. It seesm it is necessary to build a unique shutter for this lens to work with high speed film. Or maybe adding ND filters is an easier choice?

[Joshua Dunn]

Would it be possible to mount the Hypergon directly on a Sinar shutter, meaning do not mount it to a lens board in front on the shutter. Mount it as close as you can to the shutter blades to (hopefully) prevent it from vignetting.

-Joshua

[rayfor]

Would it be possible to mount the Hypergon directly on a Sinar shutter, meaning do not mount it to a lens board in front on the shutter. Mount it as close as you can to the shutter blades to (hopefully) prevent it from vignetting.

-Joshua

I've tried mounting on the thread of sinar shutter, but the blower tube will prevent the lens going deep enough.

[J. Patric Dahlen]

They look excellent! Just one question: Who owns the rights to the Goerz name these days?

[Mark Sawyer]

I'd be a bit concerned that making such faithful copies and putting the Goerz name on them crosses the line into counterfeiting..