Which adapter is being used here?

[Camerguy]

Lomo T43 40mm f/4 on canon EF mount

https://youtu.be/FI8Q6HSfJ20

I'm trying to figure out which mount he used. If anyone speaks Russian it would be of great help.

[Camerguy]

I am planning on using it on an APS-C XSi. I would need a helicoid if I don't use the original backplate (which I do have but contains small welded on parts which may get in the way of a simple filter. The T43 came off of a Smena Symbol with the shutter button behind the lens itself.) Wouldn't a helicoid increase the distance of the lens from the sensor too far away for it to function - not even considering focusing to infinity..

[lly3988]

Even if you use the thinnest helicoid, you may only be able to focus very close to the subject. Thus, limit the use of the modified lens in macro photography.