＊Cool down the temperature of CMOS sensor about 18 Celsius degree(±2℃) from that of ambient air.
＊Absolutely high-Quality image in B-shutter use compared with usual unmodified DSLR
＊Realtime Monitoring of the cooling temperature by digital thermometer
＊Drop-in filter system
＊Use of high efficiency Thermo electric cooler module
＊Power: 5V 1A DC (USB충전기, 보조배터리사용)
＊Low Pass Filter Removed.
＊Hoya MC Clear Filter Installed
＊Optimal design by 3D CAD modelling
＊Precision manufacturing by CNC machine
＊Perfect tuning of optical axis of CMOS sensor by 3 point alignment
＊Permanent Anti-dew system applied.
* Internal Silent cooling fan installed
* Live-view Focus function alive.
＊제거된 기능:Low Pass Filter, Mechanical shutter, Sensor Cleaning, Body to Lens communication(AF, Aperture Control), Image Stabilization
＊1년 무상수리 품질보증
Z6 is 24.5Mp Full Frame Mirrorless camera of Nikon. It’s 6μm x 6μm Pixel size New BSI image sensor is very good concept for Low light photography.
In case of traditional FSI(Front-Side Illumination) Sensor, the metal wiring layers are located above of photodiode layer and make small the effective pixel size. In contrast BSI(Back-Side Illumination)sensor is having the structure of photodiode over metal wiring layer and gives more wide pixel area. The factory process of BSI sensor is more difficult but the low light performance is more good than FSI sensor. Z6 is the first Mirrorless Full Frame camera of Nikon equipped BSI sensor and it will be a new good device for astro-photographers.
Tilting LCD Screen
Z6 features a bright, clear tilting LCD screen for shooting at a variety of angles. By easily switching between low and high angles, CDS Cooled Z6 freely enables angle adjustments even if the camera is mounted on refractor or newtonian telescope.
Touchscreen and Wifi will be so helpful for astrophotography too.
Permanent Anti-Dew System
‘Anti-Dew’ is very important and old issue in cooled camera design.
The Housing of cooling module of CDS Cooled Z6 is functioning as heatsink for heat radiation of Peltier element and it’s temperature is higher than that of ambient air.This housing deliver the heat to Clear Window in front of CMOS and make it warm.
Therefore it make Anti-Dew condition of window.The temperature of CMOS surface is very low and need more special Anti-Dew solution.First we made an airtight chamber with O-ring and blocked inflow of vapor into cooling module. And we prepared cold block with large surface area at cold surface on TEC.
CMOS is surrounding this cold block and cool down by the conduction from it.The surface of cold block captures vapor molecule more earlier than that of CMOS and this method prevent the dew condensation on CMOS surface.
As a result, permanent Anti-dew system is completed without any desiccants.
RELOCATION OF IMAGE SENSOR
We took out the image sensor and moved it towards the lens and made a cooling module.
Extracted CMOS sensor from camera body located in front of mechanical shutter, the exposure control by mechanical shutter is impossible and can’t use optical view finder. But there is sufficient extra space between CMOS and Mount Ring, we can install Drop-In Filter system in the space.
Drop-In Filter System
The back focus distance between the image sensor and lens mount allowed room for the drop in filter holder. This system makes it possible to install filters without removing the lens. This is very useful including for narrowband imaging.
With a filter(2mm thickness) in Drop-In Filter Holder, the Flange Back Distance of CDS Cooled Z6 lens Mount is 46.5mm, it’s same as the Nikon F-mount.
Most DSLRs control the exposure time by mechanical shutter in front of image sensor. In case of CDS Cooled Z6, exposure control by mechanical shutter is impossible because CMOS sensor is extracted from camera body.
But Z6 camera is having [ Silent Photography ] mode. This is based on Electronic Shutter and can control exposure time by only electronic shutter and need not mechanical shutter. This is very good function for modified camera, and using this functionCDS Cooled Z6 can take sub-second exposure shots with high speed shutter speed.
Since Astro 6D, we used active cooling method by 2 fans of EXcooler.
CDS Cooled Z6 inherited the concept of Astro 6D in cooling module and heatsink design. But instead of EXcooler, we added a fan on hot side of TEC.
In CDS Cooled Z6 , Heatsink on outer housing perform passive cooling to ambient air. And the fan on the rear side of TEC perform active cooling.
For efficient active cooling we added heatsink on back side and wind guide wall.
Therefore we can reduce the weight of camera and made small and simple cooled camera with high cooling performance.
In Astro imaging field, mount design is so important because the camera will be combined to so many types of OTA’s.
CF2 Mount is a standard Mount design for CentralDS cooled cameras having 22mm back focus distance .
The goal of CF2 mount design is minimized Vignetting / Various Connection / Steady and simple shape.
CF2 mount is having 22mm Flange back distance and support Full Frame and APS-C sensor. CF2 mount ring is fixed by 3 pcs of M3 Fixing screws to camera body and these fixing screws make possible CF2 mount to function as field rotator.
And this concept will be so valid for lenses installed rectangular baffle and to change the picture angle.
USB 5V 1A Power
Excooler of Old Astro 6D, Astro A7s accept 12V,3A DC input and make 8.5V for Peltier cooling module and 8V for canon camera body. Then supply these two DC Input to cooling Module and Canon dummy battery.
This method is convenient because 12V one source make two types of DC input and need not Canon’s Li-ion battery.
But it’s needed 12V 3A over DC adapter or Heavy weight Lead-sealed Battery for outdoor photography. Recently in very rare cases, we recognized electric interference of DC step down adapter for dummy battery in Excooler to Camera circuit.
In CDS Cooled Z6, Nikon’s Li-ion Battery (EN-EL15b) is the power source of Nikon camera body and we distinguished it from the power system of cooling module to get rid of the possibility of electric interference.
This isolated power system of cooling module consume only 5V 1A and you can use power bank of smartphone or smartphone charger as a power source of CDS Cooled Z6.
Upgraded Noise Removal
Highly intensive electric parts in digital cameras cause electric noise. Canon engineers installed many metal shield cover, EMI tapes etc on the PCB parts to guard image sensor from these noise source and can see the faithful Ground circuit design.
CMOS of CDS Cooled Z6 is isolated from the camera body and it’ free from the internal electric noise and fully protected from external noise by aluminum housing and it’s possible to catch noise free Astro images. In addition, the cooling module reduce the background noise dramatically.
Below is photoshop level stretched image comparison of above original shots. We can see cooled dark frame is absolutely plain without any hot pixels.