I have decided my choice type led temperature. It will be five pieces at 5000K and 5 pieces at 3000 K. They will be alternately mounted. Thus I have the choice of a group of 3000K, 5000 K and a mix of both. I will make into the camera 3 presets for white balance. This way I can judge the impact of t...

The main issue with LEDs still remains: the valley in the cyan - green zone. I was looking to add a second ring SMD green leds, 10 pieces in series as one channel, mechanically it would go. But I do not see how to solder them. There are green LEDs having about 180 lumen/piece @3.65V and a size of l...

wow, 5m long SPI bus. I like 485 bus ..... You're right, that's a better solution. In my old stock, I found the RS422 driver - receivers type MC3487 and MC3486. So with 3 pieces each, I have to 12 differential RS422 lines. Thus, the outputs of my FPGA lines shall have a nice buffer to the outside a...

Thanks Chris for the comprehensive and detailed explanation. I now think even more about the choice of the color temperature of the LEDs. Especially considering my current LEDs used have also 5000K. At that time ( Sep 2014) the price was quite high and the power a lot smaller. Now you have much more...

No problem, I use twisted pair cable with terminating resistors and never wireless. I've never had any problems with signals up to 1 MHz clock. I would take RS485 for industrial use because this is indeed better. Another solution is with 50 ohm drivers. Start signal for the flash is via a separate d...

Can't wait to see your results. There is quite some work. The unit comes in my darkroom space this is 5 meters from the main controller. A SPI protocol line will send data and commands to the flash unit CPLD: http://www.photomacrography.net/forum/userpix/3850_flash_opbouw_10ch_1.png But I'm working...

To set the white balance, I have no problem with the D7100. Through the tethering software I can define the white balance and store it in the D7100 preset values. With a gray card this appears quite correct. My current power LEDs have a color temperature of 5000K and a CRI of 90. I shoot always in R...

I'm going to update my old LED flash for higher power. The old module has 12 Cree LEDs type 9V 400mA. There are 6 channels used for controlling. https://c8.staticflickr.com/4/3953/15756218415_d3d5c06dde_c.jpg Led flash module, leds + PCB PB102673 by Frans , on Flickr https://c3.staticflickr.com/8/75...

At my current setup is the flash LED module is on a separate mechanically track. The exposure across the object remains at the same distance. I have 6800 lumen power, hence the short exposure times who works as a flash. I use 6 channels to control the light direction If necessary. See: http://www.ph...

It seems the lighting variation would be perhaps a more vexing problem to solve than the bellow rear standard automation. As mentioned, nothing comes readily to mind using electronic flash. Continuous light seems more "doable" When I dabbled with the "OlyMinCan" I finally settled on just using auto...

Thanks for the links. The images are incredible sharp. One note, I always put the stereo window on the screen level, never before. This is a personal opinion. One reason is that my wife suffers to see the 3D images as they are in front of the window. In cross version this is less critical, but on th...

Excellent stereo images and very nice lighting!
I love these beautiful images.

Frans.

this maybe off topic, but nowadays, VR viewing boxes are so cheap, maybe it is helpful to output VR viewing device compatible 3D images, so we can view it with VR box. I have never able to view a 3D image with cross view method. Picked this up for 16USD the other day. Which file format you need to ...

Which glue are you using? I assume none of it is in a position to show, in the pictures. UV curing? There are no details on the bottle, just that it is colorless and especially suitable for the bonding of insects. http://www.vermandel.com/product/entomologie-producten/prepareren/opplakkarton/insekt...

Thanks everyone! With the standard cover slips 24x24mm 0.13 mm thickness there is hardly necessary postprocessing. I use colorless glue on the cover slips. The background level is set at recording time to gray : 128,128,128. This give a very pure background. 4 potentiometers determines the correct g...