SCHNEIDER KREUZNACH COMPONON S 50MM F/2.8 V-MOUNT MaKRO-IRIS Macro LENS

Schneider Componon S 50mm f/2.8 V-mount macro lens

This is Schneider's industrial V-mount version of the enlarging 50mm f/2.8 componon S. It is the same great performer with the same 6 element design. The only downside to this lens is that they are harder to find so the prices are higher than the normal enlarger body lens.

Technical Details

Like: 
Sharpness and image Quality
V-mount system
Working distance

Can live with: 
Used market prices

Can live without: 
5 blade Iris shape

Don't need:
Retail pricing

Type: Industrial macro lens Focal length: 50mm Aperture: 5 blades Controls: Aperture ring with lock knob.

Magnification range: 1X to 4X reversed, up to 0.5X forward mounted, sharpest at f/4 to f/5.6. 

Coverage: Full frame  Working distance: Good

Lateral Chromatic Aberration (CAs): minimal color fringing

Longitudinal Chromatic Aberration (LoCAs): minimal color fringing

Lens mounts: V-mount for forward and reverse mounting and M 37 x 0.75 accessory threads.

Normal or reverse mounting: For best image quality this lens should be mounted in reverse but thanks to the V-mount design its simple to reverse the lens and mount the lens hood back on the rear. Theses industrial lenses have both front and rear V-mount flanges. 

Cost: These are more expensive and a little harder to find than the enlarging version of this lens. Expect to pay about $100-200, I was lucky to find a misidentified  lens for $50.

Lens set-up

Schneider-50-componon-S-V-mount-on-D500-2017-Robert-OToole-Photography

With the V-mount system there are never any loose mis-matching threads or sizes and the components are quick and easy to set up and rock solid once they are locked together. I really prefer using this system to using normal threaded adapters and mounts.

Camera mount adapter: Nikon F-mount to 39mm

V-mount adapter: V-mount to 39mm

Extension tube: 75mm V-mount extension tube. There are also two types of variable V-mount  extension tubes.

Where to buy: Ebay has a good selection of V-mount lenses and adapters but some of the items like the Nikon F-mount to V-mount adapter rarely come up so the prices are still high. Other sources of V-mount gear:

Schneider Optics: https://www.schneideroptics.com/industrial/macro_system/lenses.htm
Edmunds: http://www.edmundoptics.com/imaging/imaging-lenses/fixed-focal-length-lenses/schneider-macro-imaging-lenses/3065/

Notes: Schneider and almost all other enlarging lens brands offer different quality grade lenses. For Schneider you have the budget line of Componar with 3 elements in 3 groups, the higher quality Comparon lenses with 4 elements in 3 groups, then the highest quality Componon with 6 elements in 4 groups with the S added to Comparon and Componon indicating the highest level of correction for flatness of field, contrast, and color.

Schneider componon s V-mount lens shroud and cap

Schneider Optics customer service
Last year I picked up an auction of various V-mount parts that happened to have a mystery V-mount lens installed in an extension tube. The lens was in perfect shape but is was missing the shroud (which has the name of the lens on it). I emailed Schneider Optics' Los Angeles office to price a replacement and customer service responded that they would send me a new shroud at no cost if I was okay with paying for postage. The free shroud arrives the next day complete with a free lens cap! That is customer service. In my experience is can be impossible to even get a response out of Canon and Nikon, much less free replacement parts.

Technical data on the Schneider Optics website: 
https://www.schneideroptics.com/industrial/macro_system/lenses.htm