Supplemental lenses & adapters
Here are several add-on lenses and their home-made adapters for mounting on my Nikon 105mm f/2.5 AI-S lens. I keep an inventory of damaged filters for scavenging rings to make a variety of adapters for working with a number of primary lenses.
On the left is an RMS thread to 52mm adapter, shown fitted with a Gaertner 80 mm microscope objective. Below is an unmounted 60mm. Their knurled mounting "position" rings have been color coded with a marker for quick reference... red = very short working distance, blue = longer working distance. The mounted objective / aluminum disc (fitted with a 52mm ring), is ready to be mounted on the front of the 105mm with the Gaertner objective facing the subject.
At top center is an adapter made from empty 58mm filter rings, and a Zeiss Microscope "dove-tail" accessory adapter (silver ribbed screw). The adapter is shown fitted with a Voss 75mm enlarging lens, below is an unmounted Laminex 90mm. An enlarging lens is screwed into a lens mounting ring locked in place by the silver knob, its aperture always at its widest setting... to minimize vignetting. This mounting ring remains locked in place allowing for quick changing of a number of enlarging lenses. The short stack of empty rings on the right is screwed onto the lens adapter just above the red ring, serving as a spacer to prevent the enlarging lens from contacting the Nikon 105mm objective, the adapter being mounted with the enlarging lens facing the camera.
Both adapters have threaded rings that face the subject, for mounting a home-made frozen dinner bowl flash diffuser fitted with an empty Raynox UAC 2000 snap on lens mount adapter.
These lenses provide very good magnification when used on the 105mm, which is always used focused at infinity to provide the greatest working distance.
DSC-9298
Supplemental lenses & adapters
Here are several add-on lenses and their home-made adapters for mounting on my Nikon 105mm f/2.5 AI-S lens. I keep an inventory of damaged filters for scavenging rings to make a variety of adapters for working with a number of primary lenses.
On the left is an RMS thread to 52mm adapter, shown fitted with a Gaertner 80 mm microscope objective. Below is an unmounted 60mm. Their knurled mounting "position" rings have been color coded with a marker for quick reference... red = very short working distance, blue = longer working distance. The mounted objective / aluminum disc (fitted with a 52mm ring), is ready to be mounted on the front of the 105mm with the Gaertner objective facing the subject.
At top center is an adapter made from empty 58mm filter rings, and a Zeiss Microscope "dove-tail" accessory adapter (silver ribbed screw). The adapter is shown fitted with a Voss 75mm enlarging lens, below is an unmounted Laminex 90mm. An enlarging lens is screwed into a lens mounting ring locked in place by the silver knob, its aperture always at its widest setting... to minimize vignetting. This mounting ring remains locked in place allowing for quick changing of a number of enlarging lenses. The short stack of empty rings on the right is screwed onto the lens adapter just above the red ring, serving as a spacer to prevent the enlarging lens from contacting the Nikon 105mm objective, the adapter being mounted with the enlarging lens facing the camera.
Both adapters have threaded rings that face the subject, for mounting a home-made frozen dinner bowl flash diffuser fitted with an empty Raynox UAC 2000 snap on lens mount adapter.
These lenses provide very good magnification when used on the 105mm, which is always used focused at infinity to provide the greatest working distance.
DSC-9298