Lenses With Auto Iris

[Jus10m]

So I have a Red Rock adapter and I am hoping to use some Nikon lenses that I already have around. The problem is, is that the lenses need to connected to a Nikon still camera in order to tell it to open the f Stop - seeing the lens does not have a manual iris.

I heard of "hot swapping" in the forum here. Basically, attaching the lens to a digital still camera, setting the f Stop and then attaching it to the adapter. But when I attempt that, the lens never stays at the f Stop when I detach it from the still camera.

Any suggestions?
Thanks guys.

-Justin

 

[Huy Vu]

You need to press and hold DOF Preview and then detach the lens.

 

[Adam J McKay]

I just jammed something in the aperture control on the lens and away I went...

 

[Jus10m]

Hehe, I've used that advanced method as well - jamming a tiny piece of folded paper against the aperture control

As for the DOF preview, I'm having trouble finding it on my D2X or the D70.
Don't worry I'll search Google or hell maybe even the camera's manual before I pester you guys on where it is.


.... Unless you know and just want to tell me...?