FAQ
The questions will be updated frequently.
Should your question not be included below please contact und directly!
Questions about Expander
How big is the offset of the focus mark on the lens when using the expanders?
It is exactly the length between the Expanders Mounts (for example PL to PL Mount for the PLx2VV).
What advantages do Expanders offer over Extenders?
Extenders increase the focal length and are optimized for the larger final sensor format. Extenders assume that the sensor remains the same size.
Questions about Converter
What’s the difference between Mark I, II and II of the HDx35?
The HDx35 Mark I differs mechanically and optically from the Mark II and Mark III. It has no UMS Mount system for example.
The difference between Mark II and Mark III is a small mechanical ring.
The Mark II had a small ring to protect the last lens. There were a few cameras where this ring led to a collision, especially when using our UMS EF Mounts too.
Because of that we removed that ring. The optical system is the same on both systems.
What’s the difference between the HDx35 MarkIII and the HDx6K?
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What is the max. input stop I can use for the HDx35?
The adapter is build for lenses down to T1.8. Larger apertures have no effect.
Why does the HDx35 adapter loss 2.5 stops of light?
It´s a physical issue. The adapter is build with 2.7x magnification.
The 2/3" image (11 mm circle) will be expanded to the Super-35 image frame
(28.5 mm). The same light have to cover a bigger image area therefore.
Can I use the zoom motor of my HD lenses
Yes. There are several power cables for different cameras available in our shop.
Can I use the built in 2x extender and do I get the same result ?
Users may have the idea to use the built in extender and a mechanical adapter on the ENG lenses to get the same result as with our optical adapter HDx35.
No. The extenders will spread your image, but both the built in extender in a ENG lens and any external extender does just care for the image circle for the 2/3 " CCD format.
All the outer rays, that now will be captured by a bigger sensor, as the Canon C300 do not have any correction on image aberration.
This is why it is more easy to correct for an 2x extender , keeping the image circle constant at 11,6 mm than doing a correction that solves for the color aberration issue and corrects for the larger field.
Be aware of that.
Do the Converters have support shoes and posts?
The HDx2 MarkII, HDx35 MarkIII and HDx6K have a lens support shoe with a tread of 3/8". The Converters are delivered with posts
Questions about Raptor Macro lenses
Why do I need a special Macro lens, and what makes RAPTOR lenses stand out?
RAPTOR Macro lenses are optimized for close-up images up to 1:1; this means that the loss of image sharpness is reduced to a minimum.
Gerneral Questions
What is the difference between the mechanical adapter and the IB/E OPTICS optical adapter?
There are many mechanical adapters for B4 mount lenses and the the latest cameras.
These allow the mechanical connection of the expensive 3 CCD lenses on the new cameras, like the new Canon C300, C500, Alexa, F3, Epic, etc.
This adaptation is only mechanical. The image formed by the B4 mount lens that approximately is 11.4 mm, remains constant.
In conjunction with the bigger sized new cameras this B4 lens image is projected onto a chip of 27.8 or 32 mm. This gives an image standing in the middle that has significant light loss at the edge and significantly poorer image quality than you may know it from your video camera.
Why?
B4 mount lenses are designed for video cameras with 3 CCD sensors. In these cameras there sits a multi-part prism block which separates the white light into the 3 primary colors and directs each to a separate CCD. For each color channel so we do get full resolution. It delivers excellent optical quality that you would expect to have after you put the B4 lens onto the new high-resolution cameras.
The issue is: This multi part prisms ; or prismatic blocks consist of approximately 65 mm glass. As everyone knows from physics, prisms produce chromatic aberration. The engineers of the B4 lenses designed and corrected for this color aberration to let you get the best quality at the sensor.
If you now put your good old and well known B4 - zoom on the new camera and you only use a mechanical adapter, this combination misses this splitting prism. Thus, there is no prism introduced chromatic aberration anymore and so the lens is corrected in the wrong way. There is no glass in the beam path anymore.
A further effect on this missing glass is that this causes a change in the back focal length, ie the perfect distance to the sensor with infinite setting. Thus, the distance setting on the lens is not working at all.
The mechanical adapter just delivers the mechanical adaptation, nothing else.
Our optical adaptersgo a significant step further.
The HDx35 adaptor, for example
- provides a large image circle for all the latest cameras such as the Alexa, Sony, Canon and others to operate with.
- is equipped with a multi-lens, highly corrected optical system that take care for the missing glass for best picture quality.
- the distance setting remain true.
So take your favorite lens, combine it with the HDx35 adapter and you suddenly have the latest camera with your handy zoom.
The "look", i.e. the field angle range - everything remains just as you would expect from your video camera! See for yourself.
We already have many satisfied customers who are using the HDx35 even with the excellent ZEISS Digiprimes, Digizoom as well as Canon and Fuji Zoom lenses.
I have a 17-120mm in EF mount and would like to use it in PL once in a while. On EF i dont want to lose the AF capability. Which conversion would suit that?
You can use our e-UMS für Canon Zoom CN7x17 - Mark II. It allows you to swith between PL and EF very easily with the UMS system.
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