Saturday, January 28, 2012

[UV] Transmittance of some Bellows Lens Heads

I conducted a test today to measure the UV transmittance of some older manual bellows lens heads I have here.

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 has been used as a reference, as it stands out as a very well UV transmitting lens. The (expected) surprise was, how well that older and overlooked Minolta TC f4/135mm perfomed, nearly identical to the Noflexar (only about 0.2 stops less at 365nm).

I will show its photographic performance in a separate test later.

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

More info on this very interesting field may be found on my site