Single lens data version M42-L1   producted by  Dyxum member jameslaot

Description:
 The M42->SONY-a/Minolta-AF electronic adapter, which has the electronic circuit inside, may simulates the data interface of the lens of M-AF format. Its electronic touch point connects to the same point on digital camera under normal condition. When digital camera is performing boot, it reports the simulating data of the lens for the digital camera. Thus, the digital camera will treat the MF lens as the AF lens. Then the Focuses Confirmation, as well as more important AS(for KM 5D/7D)/SSS(for SONY-a) functions can be started using.
For giving a maximum effect for AS/SSS, it should choose the same lens parameter as the MF, for instance, if you want use the Takumar 50/1.4, the best selection is simulating to the Electronic Adaptor of AF50/1.4. When you use the 135/2.8 MF lens, you’d better to select AF135/2.8. This may avoid remedy mistake because of the actual different focal distance brings from AS function.
The same as the above principle, we shouldn't suggest use focal variation manual lens for avoiding calculation adjustment error brings from the AS function. Since it is unable to provide the correct focal distance data to the camera, it inevitably brings the calculation adjustment error which can cause the vibration due to the system error.
The M42->SONY-a/Minolta-AF Adaptor features compact construction and limited space. Although this Adaptor adopts comprehensive technical method, and considers the situations of the majority of lens, it still has the possibility of the position interference with the using lens. It usually present with rough install for the lens screwing to the Adaptor, or strenuous. In this instance, we suggest not install forcefully and change to other lens, or you can grind the thread of the lens.

Customization:
Default len's data in the adapter is 50/1.4 . If you want Four len's data version,please see another item in my ebay lists.
You should leave message or email me if you want the custom lens data
All len's data could be selected by user before shipping.
    The focal lengths can be: 8,12,16,18,20,24,28,35,50,55,60,85,100,135,200,300,400,500,800,1000mm
    The Max apature can be 1.1,1.3,1.4,1.7,1.8,2.0,2.2,2.5,2.8,3.2,3.5,4,5.6...

Shipping:
    We can use Airmail shipping to worldwide , the shipping fee is about 7US$ .2US$ for per additional one. They are maybe reveived about 2 - 4 weeks or many more days.