ISCOMORPHOT 8/1,5x questions

[jpolzfuss]

Hi,

I just bought a cheap ISCOMORPHOT 8/1,5x on eBay. It looks like it was made for one of those Bauer-Double8-cameras since it came in a Bauer-leatherbag. (It came without adapters for the thread or the anamorphot for the viewfinder though.)

Unfortunately the seller hasn't got any clue and it came without manual... hence my "stupid" questions:

• Is this an anamorphic attachment or a complete lens?
• If it's an attachment: Do I have to focus the camera to "infinity" and then only focus with the Isco? Or is this one of the older models where both lenses have to be set to the same distance?
• What's the light-loss of this Isco? 1/3 f-stop? Or more/less? (I want to use it on a camera without TTL-exposure)

Thanks,
Jörg

[jpolzfuss]

*bump*

[arnaud]

I haven't been able to find your answer on this great database.
But I guess that :
1/ If you've got an f stop ring on the lens then it's a prime, if you just have a focus one then it's an A-lens.
2/ You might have to test it first of all but usualy Isco goes infinity and focus on the A-lens. If it's a prime, well the question is null and void.
3/ You could try a spot meter through the lens and without it (ask a photo's shop if you don't own one).
a.

[arnaud]

••••twin submit••••

[romeojesus]

i bought one of these on a fleamarket last summer (5euro)...

I hoped the rear end was large enough to cover the front of my leicina specials 10mm cinegon...unfortunately it was not
too sad because it is a nice small anamorphotic lens
and i am eager to shoot some anamorphotic stuff...

....it is not a complete lens, because it has no iris..

somewhere I read that fits one of those older leicinas with an additional bracket...due to the fact that those leicinas have a built in prime lens (i think
it was a 9mm) and all additional lenses are added to that basic lens by a thread...( so can the iscomprphot..focussing is then achieved with the iscos focus ring) the iris is in the cameras body..not the additional lenses..
i think i found this an cinematography.com...but i am not sure


christian

[kontrabass]

I just bought a expensive iscomorphot 8 1.5x on ebay, 261EUR, I am waiting for the adapter to connect to my NIZO 3056. it has very tiny rear element, the rear thread is 24mm. so it can only be used on the long end of the zoom on Nizo 3056 which has 52mm filter thread.

I am searching some other super 8 camera which has smaller filter size, but they are either have only 18fps or need mercury cell battery for light meter.

[nikonr10]

Bringing this one back from the grave ? Can anyone tell me what's the filter at the back rear of the len's is for , Thank you !

[jpolzfuss]

Can anyone tell me what's the filter at the back rear of the len's is for

You've got a filter at the rear? Strange! My guess is that the the previous owner only had filters that fit his camera's lens. So he simply placed the filter between camera and isco. And when removing the isco, the filter accidentally stuck to the isco (instead of remaining at the camera) and was then stored and forgotten...
...another idea: Is it a rotatable filter? If yes, the previous owner probably used it for easier alignment of the Isco...
...another idea: Could it be that the filter does have a different filter-thread in front? If yes, the filter might have been used instead of a step-up-/step-down-ring

[nikonr10]

Can anyone tell me what's the filter at the back rear of the len's is for

You've got a filter at the rear? Strange! My guess is that the the previous owner only had filters that fit his camera's lens. So he simply placed the filter between camera and isco. And when removing the isco, the filter accidentally stuck to the isco (instead of remaining at the camera) and was then stored and forgotten...
...another idea: Is it a rotatable filter? If yes, the previous owner probably used it for easier alignment of the Isco...
...another idea: Could it be that the filter does have a different filter-thread in front? If yes, the filter might have been used instead of a step-up-/step-down-ring

When I did a search on the iscomorphot via the all knowing internet , I found that it did come with a rear filter , just wanted know what it was for ,
but thank you ,

[jpolzfuss]

I found that it did come with a rear filter

Do you probably mean "rear filter thread"?

Rear filter = a real filter mounted on the rear, e.g. an ND-filter like this one: http://www.tiffen.com/displayproduct.ht ... mnum=77vnd
Rear filter thread = just a male thread ( http://en.wikipedia.org/wiki/Screw_thread or http://www.cs.mtu.edu/~shene/DigiCam/Us ... rings.html ) on the rear that can either be used to mount a filter on the rear or to mount the anamorphic attachment onto the camera's lens (=into the camera's lens filter thread - which is a female thread)

[nikonr10]

I found that it did come with a rear filter

Do you probably mean "rear filter thread"?

Rear filter = a real filter mounted on the rear, e.g. an ND-filter like this one: http://www.tiffen.com/displayproduct.ht ... mnum=77vnd
Rear filter thread = just a male thread ( http://en.wikipedia.org/wiki/Screw_thread or http://www.cs.mtu.edu/~shene/DigiCam/Us ... rings.html ) on the rear that can either be used to mount a filter on the rear or to mount the anamorphic attachment onto the camera's lens (=into the camera's lens filter thread - which is a female thread)

Ok have the lens here ! when you look at the rear of the len's there a small filter type that screw into the back , it you unscrew this small filter you can now see the rear of the isco lens glass ? this small filter screw inside the rear of the lens , I want to know is what it is for ?/ or is to just protect the rear of the lens ,
as there is no manual out there that I can find as yet, for the rest this is such a nice well made len's ! what a little Gem ,

[jpolzfuss]

At the rear of my Iscomorphot there's a metal "filter thread adapter". While the Isco is mainly black, this adapter is silver and hold in place by 3-4 small screws. But it's only an empty metallic ring that was designed to act as a "step up ring"/"step down ring". It's not a filter as there aren't any optical elements.
Is there anything engraved into / printed onto your filter? When it's an UV- or skylight-filter, then it was mainly used as a "lens protector". When it's a polarizing-filter (sometimes only marked as CP or LP), then it might have been used to reduce reflections. When it's something else (ND, yellow, green, Wratten 85, Wratten 80A...) then it was most likely used to reduce problems caused by the camera's limitations (ND) or to adjust the image to the used film-stock (yellow and green are typical b&w-filters, while the mentioned Wratten-filters are used for color-film-stocks for "inappropriate light sources").
There's also a chance that the "filter" isn't a filter, but a "macro adapter", "wide angle adapter" or "telephoto adapter" to reduce vignetting or to overcome the limitations of the camera's lens.

[nikonr10]

At the rear of my Iscomorphot there's a metal "filter thread adapter". While the Isco is mainly black, this adapter is silver and hold in place by 3-4 small screws. But it's only an empty metallic ring that was designed to act as a "step up ring"/"step down ring". It's not a filter as there aren't any optical elements.
Is there anything engraved into / printed onto your filter? When it's an UV- or skylight-filter, then it was mainly used as a "lens protector". When it's a polarizing-filter (sometimes only marked as CP or LP), then it might have been used to reduce reflections. When it's something else (ND, yellow, green, Wratten 85, Wratten 80A...) then it was most likely used to reduce problems caused by the camera's limitations (ND) or to adjust the image to the used film-stock (yellow and green are typical b&w-filters, while the mentioned Wratten-filters are used for color-film-stocks for "inappropriate light sources").
There's also a chance that the "filter" isn't a filter, but a "macro adapter", "wide angle adapter" or "telephoto adapter" to reduce vignetting or to overcome the limitations of the camera's lens.

it you look at rear of your isco lens do you have apart you can unscrew it's like a small round piece of glass that screw into the back of the lens ,
just want to know what it is for ?

[jpolzfuss]

Tja, da staunt der Laie und der Fachmann wundert sich!
(= No clue other than my previous guesses as this is the first time I've heard of something like this.)

[nikonr10]

Tja, da staunt der Laie und der Fachmann wundert sich!
(= No clue other than my previous guesses as this is the first time I've heard of something like this.)

As some years has gone by/ maybe more light on this gem of a lens !
Thank you for your input , very hard to find much about this lens, apart from some picture here and there , but no real depth ,
but you can but try , will keep on searching ,

Keep it DIY ,