What does the name ISCORAMA CU 1.5x stand for?
"54" refers to the size of the back lens of the ISCORAMA in mm. (Please note that this limits the use of bigger taking lenses.)
"CU" stands for Close-up. We improved the close focus function of the new ISCORAMA to approximately 1.4 m compared to 2 m of the original ISCORAMA version from the 60s.
"1.5 x" represents the average squeeze ration the ISCORAMA is working with.
Can I buy the ISCORAMA 54 CU 1.5x anamorphic adapter separately?
No, the ISCORAMA 54 CU 1.5x is part of the ISCO4all set and cannot be bought separately. The same holds true for the ISCOsphericals A+.
What is the ISCORAMA's squeeze factor?
The average squeeze factor is 1.5x. This factor varies slightly throughout the entire picture. In the middle, it will be a little less while it increases slightly towards the edges. Additionally, the squeeze factor decreases with longer focusing distances. This is an optical phenomenon that you will find with any anamorphic front attachment as well as generic anamorphic lenses when focused with a variable diopter system.
Does the ISCORAMA work with hf / electronic / manual follow focus systems?
When mounted correctly while using standard gears on FF or motor, it will work flawlessly. However, mounting the motor is a bit tricky. The gearing will travel through the motor's gear. In some cases, the use of a wider gear might be recommended or mandatory.
What is the size of the ISCORAMA's front filter thread?
The size of the ISCORAMA's front filter thread is 95 mm.
What is the size of the ISCORAMA's mounting thread?
The size of the ISCORAMA's mounting thread is 77 mm.
What is the minimum object distance (MOD) of the ISCORAMA 54 CU 1.5x?
Compared to the original ISCORAMA 54, we have improved the close focus from 2 m to 1.4 m. If you need to get closer, we recommend using diopters.
Do I need a mechanical support for the ISCORAMA?
We highly recommend using a rod support to take stress off your valuable taking lens. That is why our ISCORAMA 54 CU 1.5x is delivered with a mounted 1/4"-20 support bracket.
Furthermore, we also offer a bigger ISCORAMA 54 Support Bracket with a 1/4 and 3/8 thread as an additional accessory.
What is meant by the 1/4"-20 UNC Support Mount?
1/4"-20 UNC is the description of the thread used for the 15 mm rod support. It is the standard camera support thread used on most tripods and baseplate kits.
Can I mount the ISCORAMA 54 CU 1.5x on a LWS rod mount system?
Our ISCORAMA 54 CU 1.5x is delivered with a mounted 1/4"/20 support bracket. However, to address this issue, we offer an optional bigger and stronger support bracket with 1/4 and 3/8 thread: "ISCORAMA 54 SUPPORT BRACKET 1/4 + 3/8" (ID 1103882). For more details, take a look at the list of ISCO4all's additional accessories.
Please note: We strongly recommend using the ISCORAMA with a support, especially when used in combination with old and precious vintage lenses.
How can I mount the ISCORAMA on a third party and/or vintage lens?
Basically, you can use any step-up adapter ring to mount the ISCORAMA to a third party lens. We offer a set of custom-built adapter rings providing perfect fit for lenses from 52 up to 72 mm (ID 1104771). These adapter rings minimize the airgap between your taking lens and the ISCORAMA's back lens.
For the use with the ISCOspherical A+ 43 mm (T2.4), we added a slim version of the 72 to 77 mm adapter ring to minimize vignetting in FF mode.
Minimizing the air gap is crucial to keep the viewing angle as wide as possible.
Please note: Make sure that the front lens of your taking lens does not touch the back lens of the ISCORAMA, e.g. while focusing, as this will most likely damage both elements.
Which lenses can be used with the ISCORAMA 54 CU 1.5x adapter?
You can use any lens with a maximum diameter of 54 mm (of the actual front lens, not the barrel). We offer a set of adapter rings from 72 to 52 to make sure that you do not have to combine several step-up rings. Keeping the air gap between the lenses as small as possible is crucial to maintain the widest possible viewing angle.
Please note: We do not recommend using big and modern cine lenses as these usually have a big light trap in front, which reduces the maximum viewing angle. The original ISCORAMA was optimized for 50 mm lenses. Thus, the design limits the use of lenses with a wider field of view. The limit is somewhere between 40 mm and app. 35 mm when used with a full frame sensor - depending on the build of the taking lens used.
Does the front lens of the ISCORAMA rotate/travel?
The front element turns and travels app. 8 mm while focusing from the infinity to close focus position.
Is there a lightloss when mounting the ISCORAMA in front of a taking lens?
No, there is no lightloss.
Does the ISCORAMA provide a single focus solution?
Yes. The ISCORAMA 54 CU 1.5x has got a built-in patented and variable diopter.
For further details, take a look at question "How can I adjust the focus while using the ISCORAMA?" (s. below).
Do I have to set the taking lens to infinity?
Yes, we recommend you to do that. For further information, just take a look at the question below: "How can I adjust the focus while using the ISCORAMA?"
How can I adjust the focus while using the ISCORAMA?
ISCORAMA has got a built-in patented single focus solution based on a variable diopter. After the taking lens has been set to infinity, the focus can be adjusted with the focus ring of the anamorphic adapter/attachment.
Furthermore, we offer a focus lock for the ISCOsphericals (ID 1104521) as an additional accessory to prevent unwanted focus shifts on the taking lens.