New 75mm Hypergon Lens

[ic-racer]

I also added a little spring which works very well!
I made the spring out of Lexan.

[Kiwi7475]

On our shots, the raw brass did not affect this much. Maybe it was the problem of the chemical we used on our final product to make these brass parts even more shinier. I will do some further test next weekend.

Hi, what do you mean by “much”? Some effect was visible?

Thanks, yes, it would be real nice if you could run a couple of tests with the final version, not just indoors as with the example you shared, but also outdoors in a bright day.

[ic-racer]

I inverted the photograph of my 8x10 negatives. The dramatic effect of blackening the spinner is easier to see:

[Corran]

Thanks for testing and reporting on this ic. I'll have to do the same.

[ic-racer]

I'm very happy with this image.

The lens is very sharp but focus is critical. Also, alignment of the standards needs to be perfect.
You can get an idea of the angle of view by seeing how close I was to the guitars and how far away the appear in the negative.

[Kiwi7475]

I'm very happy with this image.

The lens is very sharp but focus is critical. Also, alignment of the standards needs to be perfect.
You can get an idea of the angle of view by seeing how close I was to the guitars and how far away the appear in the negative.

That looks really great… all the previous issues solved, seems like. Can I send you mine to do the same that you did for yours? As a paid service of course :-)

[rayfor]

Hi, what do you mean by “much”? Some effect was visible?

Thanks, yes, it would be real nice if you could run a couple of tests with the final version, not just indoors as with the example you shared, but also outdoors in a bright day.

I said much since it perform the same as my orignal hypergon. There is no coating on oringal hypergon which makes it's harder to notice this central contrast loss .
Also thanks for these tests, it seems the black print does help a lot in direct light.

[Ron in Arcata California]

Here is a shot made several years ago in Skagway Alaska with my original 75mm hypergon. The exposure if I remember right was one minute with the fan followed by 6 seconds full exposure. That would be a 10:1 ratio, it sorta worked for me on that cloudy rainy day still a bit uneven. The lens is reasonably sharp but not perfect.



window detail

[Ron in Arcata California]

This is very similar to the original air bulb that powered the fan. It has a second bulb in a net that helps feather the air pressure like the original. I added a small valve from an aquarium supply story to regulate the air even more. You don't need the thing spinning like an airplane propeller, but stopping and starting isn't good either. Again, this isn't perfect but with a little tinkering it worked for me.

I still might figure out a way to use a small air tank to keep it running. Trust me, using a squeeze bulb causes problems.
My best shots were made with the fan spinning before I removed the lens cap. You almost need to be an octopus to handle everything and not shake the camera in the process.

Walter Stern 206 Rubber Bulb

It is available at several places just Google a search. I think I paid about $25 for mine.

[John Layton]

Ron that detail in the window looks plenty sharp...and the complete lack of distortion is surreal!