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UltravioletPhotography

Prinzgalaxy 35mm f/3.5 vs Soligor KA Koyei clone


lost cat

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In our collective neverending quest for yet more UV capable lenses I present to you a photo comparison of a Prinzgalaxy 35mm f/3.5 lens vs a Soligor 35mm f/3.5 KA Kuri clone

 

Soligor:

post-90-0-90149200-1454789964.jpgpost-90-0-81354100-1454789956.jpg

http://m42lens.com/m...5mm-f-3-5-22-v2

 

Prinzgalaxy:

post-90-0-61290100-1454789973.jpgpost-90-0-30112100-1454789981.jpg

http://m42lens.com/m...y-35mm-f-3-5-16

 

Camera: Unmodified Nikon D40.

 

Lens Configuration: Macro configuration with an additional helicoid and/or short extension tubes to try to normalize the subject to camera distance as much as possible.

 

White balance: All photos were white balanced against a slightly defocused PFTE tape wrapped block of wood with at least three layers of tape. Visible shots with an exposure of 1/30s UV shots with an exposure of 1/8 sec. Note - the WB was performed using the in-camera "use photo" function. although no error message was generated it does not appear to have worked properly.

 

Illumination: Visible images taken with two 25W incandescent bulbs with reflectors 22 and 26cm distance from subject +/- 45 degrees from camera-to-subject plane. UV images as above but with incandescent bulbs replaced with two 26W CFL blacklight blue bulbs.

 

ISO: 400 for all imaging

 

Aperture: f/8 for all imaging

 

Shutter speed(s): 1/30s for Vis images, 1/8s-30s for UV

 

Distance to subject: 15 cm for both lenses (flower to camera body)

 

UV Filter: Front mounted Astrodon "U" 1.25"

 

Mounts: Both lenses have a T mount

 

Filters: Prinzgalaxy uses a 52mm filter Soligor uses a 46mm filter

 

Left/Top: Prinzgalaxy Right/Bottom: Soligor

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Visible 1/30s:

post-90-0-44235000-1454789755.jpgpost-90-0-17406600-1454789871.jpg

 

UV 1/8s:

post-90-0-62986000-1454789771.jpgpost-90-0-78897400-1454789880.jpg

 

UV 1/4s:

post-90-0-08034700-1454789780.jpgpost-90-0-37405800-1454789890.jpg

 

UV 1/2s:

post-90-0-88877200-1454789802.jpgpost-90-0-07806200-1454789900.jpg

 

UV 1s:

post-90-0-61742200-1454789814.jpgpost-90-0-79672000-1454789906.jpg

 

UV 2s:

post-90-0-40445600-1454789822.jpgpost-90-0-71554000-1454789913.jpg

 

UV 4s:

post-90-0-78199300-1454789830.jpgpost-90-0-71671500-1454789922.jpg

 

UV 8s:

post-90-0-86049800-1454789837.jpgpost-90-0-81939700-1454789930.jpg

 

UV 15s:

post-90-0-20130800-1454789847.jpgpost-90-0-88079900-1454789937.jpg

 

UV 30s:

post-90-0-33613600-1454789854.jpgpost-90-0-32192400-1454789945.jpg

 

To my eyes the performance of the Prinzgalaxy- at least under my testing methodology - is maybe 1 stop less than the Soligor KA . Both these lenses are already on the list so I am adding this post to provide a metric.

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Can there be such a thing as "likely clones" - the therm "clone" described an object that is in all aspects identical to an original...

 

"Likely " depends on whether the other lenses are clones or doppelgangers.

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