Yestertech applied

[DrEntropy]

A set of Nikon extension tubes I've had almost forever, and a 50mm ∱1.4 AiS on a D850. This was just a "Quick-n-Dirty" experiment, came across the tubes in a hunt for other things.

 

[GregW]

Oh that leather case looks familiar. Mine came without instructions and I still don't really know what to do with them.

 

[waltesefalcon]

Is it for macro photography? Moving the relative position of the lens to the mirror makes for greater magnification and smaller field of view???

 

[DrEntropy]

Oh that leather case looks familiar. Mine came without instructions and I still don't really know what to do with them.

Other things were also in the leather cases "back then". I've a waist-level "flip-up" viewfinder for the Nikon F in one, too. Nikon was much classier in those times.

Is it for macro photography? Moving the relative position of the lens to the mirror makes for greater magnification and smaller field of view???

Yep. They are for closeup photography. Changing the distance from optic to film plane does increase magnification. Downside is that there's not as much adjustment as using a bellows. And only fully manual lenses (AI/AiS) work well with them. As I also commented, they really should be used on a tripod.

 

[GregW]

As I think about it more, I remember having to use Live mode for composing because the aperture doesn't go full open and stop down with the shutter click.

 

[DrEntropy]

As I think about it more, I remember having to use Live mode for composing because the aperture doesn't go full open and stop down with the shutter click.

Oh yeah. All manual. When you set an ∱-stop, it does close down the diaphragm. Focus wide open, stop down to shoot. Some small focus adjustment is possible with the lens barrel itself, but changing distance-to-subject is what works to set specific magnification. Tubes are marked A,B,C, for reference and combined with lens focal length to determine the degree of magnification. There were charts to give specifics, no idea where those have gone. ISTR I had them at some point.