Manfrotto 804RC2 brand_Praktica You can configure the tubes

You can configure the tubes and mounts for extension between 10mm and about 62mm

Optics are free of issues

and one 60mm tube

however: Nikon recommends the TC-16A only with the F-501/N2020

Manfrotto 804RC2 brand_Praktica You can configure the tubesThe Manfrotto 804RC2 tripod head is a lightweight three way head with Manfrotto's compact RC2 quick release system. Just so you're not surprised when you see it, this head is made of plastic, not metal. It's very good plastic, but if that weirds you out, this may not be the head for you. In excellent condition, with minor cosmetic wear from light use. Mounts to tripods with a standard 3 8" thread; the included 200PL quick release plate has a 1 4"