Nikon D3400  type_Black & White so you need to guess

so you need to guess your focus (or use an external rangefinder

using the Pre-AI aperture linkage and LED meter readout

this teleconverter dials in focus automatically after manually focusing to the general distance

but the filter is good

This is the adapter only: cables are not included

Nikon D3400 &nbsptype_Black & White so you need to guessThe Nikon D3400 is a lightweight DSLR compatible with Nikon F mount lenses (not included.) It has a 24mp DX sensor, 3" screen, full HD video recording, WiFi, and more a thoroughly modern compact DSLR body. In really excellent condition, with approximately 10k actuations. Includes two genuine Nikon batteries, charger, and strap.