[UV,VIS,IR] Staeble Lineogon f3.5 / 35mm wide angle lens for reflected UV

Here some test results using the Staeble Lineogon 3.5/35mm lens for reflected UV photography, as well as for IR after having done some successful transmittance tests as shown here on my BLOG

VIS:


UV:


VIS-UV differential:


IR:


VIS-IR differential:


UV-IR differential:


[please ignore the shadow image in the last three images caused by ND+IR stacked filters, this is unrelated to the lens performance]

In summary one could say that the lens performs quite well; there is some focus shift, but rather small. No wonder actually, since Stable was the subcontractor of Novoflex, so the Noflexar 3.5/35mm and the Lineogon 3.5/35mm share the same optics based on my research. The mechanics are different though, as the Lineogon has a quite smaller barrel and also lacks the close-up focusing mechanism teh Noflexar is so famous for. It also has a M39 thread mount, but not a Leica register, as it once was made for the Braun PAXETTE camera, having a 44.0mm register.


Stay tuned, more will follow on that fascinating subject...

More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos

[UV] Tested transmittance of eight 35mm wide angle lenses for reflected UV

I conducted a test today to measure the UV transmittance of some older manual focus lenses I had sitting around, all f = 35mm and all having either M39mm or M42mm thread mount, so may easily be adapted onto modern DSLR's, if their back focal length fits the camera register.

Be reminded that this is only a test of the suitable UV transmittance, not of other important parameters for UV photography (sharpness, contrast, freedom of flare or hotspots etc.)



Of course the well known Novoflex Noflexar 35mm stands out as a very well transmitting lens and it is actually not a surprise that the Staeble Lineogon does about equally well - it is the same optics inside as Novoflex subcontracted to the German company Staeble to design their optics, which my own research concluded. Be reminded that the Lineogon was made for the PAXETTE camera with M39 thread mount, but for a 44mm register (so is NOT Leica compatible, but helps to adapt as it allows for 15mm more space).


Stay tuned, more will follow on that fascinating subject...

More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos