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High-speed setup with D300 picture 9409.jpg

High-speed setup with D300 picture 9409.jpg

Final high-speed setup, Olympus E-PL3 replaced by the Nikon D300 camera.

Why this replacement:
Better pictures, less noise.
ISO low to 100 better for longer camera capture time with internal shutter open.
Better acces to the memory card and the battery for exchanging.

Specs:
Nikon D300 camera in manual mode.
DIY adaptor to mount the Nikor AF105/2.8D macro lens.
Nikkor AF105/2.8D macro lens.
A DIY external shutter housing has the super fast Uniblitz VS14s shutter.
The shutter-lag is only 3.5ms, the opening time is 4.5 ms or 1/220 sec.
A DIY HT module control the 65V to the external shutter. The high power current for the external shutter is supplied by a flash capacitor 740 uF/330V.
The 2 flashes are SB-80-DX types (or SB800). They works in TTL mode and are controlled via my hardware modules. Via the keyboard all settings can be changed and stored into a flash eeprom. So the flashes are all controlled from the controller and no more individual on the flashes itself.
The hardware core is a FPGA module from terasic, the DE0-nano. Very powerfull and small. All high-speed timings are controlled from this board. More then 81 I/O pins are used.
All modules in this unit can be reprogrammed via an USB connection.

For high-speed in-flight insects capture I use a laser system to know when an insects come in focus. This laser system is very accurate and quickly. In just 50 us I know when an insects stay infocus. Thereafter the high-speed external shutter is activated into 3.5 ms to take a picture. Even super fast flying insects at macro closeup stay in the picture frame with this ultra short detecton delay and shutter-lag.

The detector has a 128 pixel line array to readout the laserbeam. A distance change of only 0.25 mm can be seen by the line array. Each pixel has an 8 bit value. The value, the position and the noise can be set into the parameters for optimal picture capture. Even super small insects of 0.5mm can be detected at 500 mm from the macro lens and this into the super short time of only 50 us (1/20.000 sec)

I use a power-pack module to powerup all the hardware. The racing pack module gives 7.5V @ 4200 mA. Multiple DC/DC convertors converts this to the correct voltage with high efficience. More then 10 hours autonomy is provided.

List of frame versus distance (object to frontside macro lens):

Free Distance ...... Frame
410 mm ............... 80 mm
360 mm ............... 70 mm
310 mm ............... 60 mm
280 mm ............... 50 mm
235 mm ............... 45 mm
215 mm ............... 40 mm
190 mm ............... 35 mm
165 mm ............... 30 mm
147 mm ............... 25 mm
125 mm ............... 20 mm
112 mm ............... 17 mm


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