The Imagon 200 5.8 for 4x5?

[Ed Vatza]

One last question. Will a disk from the 250 fit on the 200? Both take the same filter size so I am wondering if the disks are the same? Or not?

I think the answer is no but I'm not positive. Can someone please verify.

Ed

[Jac@stafford.net]

I've used my 300mm Imagon on 8x10 a number of times without issue. (That extrapolates to 150mm on 4x5.)

I am not certain that is accurate for the Imagon, but willing to be shown wrong.

[Bob Salomon]

One last question. Will a disk from the 250 fit on the 200? Both take the same filter size so I am wondering if the disks are the same? Or not? Thanks.

Ed

The 200, 250 and 300 all have the same front mount and accept the same filters and hoods. However the disks are different as their center hole sizes are different for the same range of T stops.
So yes, a 250 disk will fit but the halation will be different then the proper disk.

The same is true with the 120 and 150 Imagons. Their disks will interchange with each other but they will also have different halation.

[B.S.Kumar]

I "expect" lenses to do what I want, not what the data sheet wants.

Worth noticing that only the Imagon and Fuji SF use discs at all. Every other SF lens on the planet has used the aperture as a means of selectively controlling the effect to the photographer's own preferences.

The Mamiya RB and RZ SF lenses are similar to the Fujinon SF lenses, with disks behind the front cell.

Kumar

[Ed Vatza]

The 200, 250 and 300 all have the same front mount and accept the same filters and hoods. However the disks are different as their center hole sizes are different for the same range of T stops.
So yes, a 250 disk will fit but the halation will be different then the proper disk.

The same is true with the 120 and 150 Imagons. Their disks will interchange with each other but they will also have different halation.

Interesting! And thank you. The 200 I am looking at has the 7.7/9.5 and 9.5/11.5 disks but is missing the 5.8/7.7 disk. I know where I can pick up a 5.8/7.7 disk from the 250. It could be interesting to see what I think of the effect.

Ed

[cowanw]

Not all 250 mm Imagon have the same size discs, some are 53mm and some are 68mm in diameter.

[Bob Salomon]

Interesting! And thank you. The 200 I am looking at has the 7.7/9.5 and 9.5/11.5 disks but is missing the 5.8/7.7 disk. I know where I can pick up a 5.8/7.7 disk from the 250. It could be interesting to see what I think of the effect.

Ed

Too bad you didn’t ask a few years ago, we stocked spare disks but once the Imagon was discontinued we sold them all out.

Portrait and wedding photographers were the largest market for the Imagons after Monte Zucker, Al Gilbert, Tibor Horvath and some others began their various seminars and classes in the mid to late 60s. All of these guys used Hasselblad 250mm lens mounts with an adapter to mount the 200mm or special mounts and focus mounts for the 200 and virtually all of them used the 5.8 disk with the periphery holes closed to shoot at 7.7. So that is probably the hardest disk to find today.

[Bob Salomon]

Not all 250 mm Imagon have the same size discs, some are 53mm and some are 68mm in diameter.

All ones made since at least 1986 have the same mount. But the lens goes back decades before that, so changes could have easily occurred in all the time they were made.
I know since 86 as that was the year that we became the Rodenstock distributor in the USA.

[B.S.Kumar]

Some information:

https://www.largeformatphotography.i...=1#post1305012

Kumar

[Mark Sawyer]

I've used my 300mm Imagon on 8x10 a number of times without issue. (That extrapolates to 150mm on 4x5.) I've used both disks and conventional aperture, and found I prefer a conventional aperture closed down slightly. I've never had a problem with vignetting, but the corners go quite soft.

I am not certain that is accurate for the Imagon, but willing to be shown wrong.

Here are a couple of old ones done with the 300mm Imagon on 8x10, wide open. I believe a number of people here use the 300mm on 8x10. It probably illuminates 11x14. Most landscape lenses are so short-barreled they tend to throw a very wide cone of light.