Just asked the question what chip is better and I decided to write the thoughts here that there was no speculation in information by sellers of chips.

Vendors of dandelion chips

1. V. Lushnikov (Russia)
2. Big-Is (China)
3. optixpcb (Hong Kong?)
The 3rd option is godlessly obsolete and there is no sense to consider it.

Lushnikov’s adapter and Chinese are similar on ideology of operation. On the majority of lenses the camera calculates exposure correctly, irrespective of the exposed value of a diaphragm on the camera.
Some sellers hang out such information that Lushnikov’s adapter (at the left) strongly exceeds Chinese. Let’s understand explicitly differences.chip

And so it is nonsense.
First, production of Lushnikov chips in any way are not Europe. Russia or Ukraine. When we were included into the European Union?
Shape factor is identical. The small chip on a plastic substrate on  2012.


Leitax adapter with Lushnikov chip

Don’t pay attention to quality of the adapter — it is made in Spain and has very high quality. Also costs near 3500rub.


adapter M42

adapter C/Y-Canon EOS (Chinese)

adapter C/Y-Canon EOS (Chinese)

Both that and others for today the programmed chips. The Chinese programmable has marking of EMF.

The diaphragm is put on 1-45 on the Chinese adapter, but I something strongly doubt that it is required to someone more. As the expert in the lenses Lens-club.ru I will tell that such lenses are very popular. Generally the lenses allowing to put value of a diaphragm more than 32 are medium format (to F45). And to 64 (and further to 90) it is lenses on a big format. Thus there is no sense to do the minimum diaphragm by number more F45.
The focal distance on all types of chips is exposed identical the 1-65535th.
It would be interesting to look at such lens as noted one of readers :)

Leitax adapter with Lushnikov chip

Leitax adapter with Lushnikov chip

Adjustment of an autofocus is on all types of chips.
We don’t consider old inventories here! The modern chips of Lushnikov and the modern programmable EMF chips of Chinese.
— I will tell nothing about ETTL, I didn’t try it yet. Tomorrow the flashout will be charged and I will try it. Though the flash-out is generally angrily and when I use it, I transfer it to the M mode that it strongly didn’t load the artificial intelligence and didn’t spoil my pictures.

And still I will add information about ETTL. Today I loaded the flash-out for Canon 580 EX II rolling on the shelf and checked it. When I used the adapter with Lushnikov’s chip the diaphragm was almost open and any another is transferred to flash-out. But it is clear — on the camera in a case with this chip, we can not change a diaphragm. Accordingly the exposure is measured incorrectly and the result we have an underexpose.
In a case with the Chinese adapter we do not have this problem (maybe there are others, but I didn’t find it, it worked normally). Value of a diaphragm is transmitted to flash-out and exposure is calculated correctly.
AF/MF mode — what is it? It seems as there are chips to adapters on manual lenses.