Magical pics post-Fred, thank you. Maybe others have noticed - I have never seen a lens that does reflections so readily before this one, you see them everywhere. As well as being very high resolution, the smoothness of the 50/2 is special. You just want to shoot it to see what it cannot do, lol.
Editorrr wrote:
What does the word "lanthar" mean?
The name is derived from the element lanthanum with atomic number 57 the first of the lanthanides or rare earth metals, https://en.wikipedia.org/wiki/Lanthanum
Today lanthanum is not used in the apo lanthars, as new materials are used to achieve apochromatic performance.
Apr 24, 2020 at 03:08 PM
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Editorrr wrote:
What does the word "lanthar" mean?
In Voigtlander speak these days Lanthar goes with APO and generally means a moderate aperture lens with exceptional image quality. Currently Voigtlander only has 3 APO Lanthars all for the Sony E mount, the 50 f/2 APO Lanthar, the 65 f/2 APO Lanthar Macro, and the 110 f/2.5 APO Lanthar Macro. In the fairly recent past Voigtlander had a 90 f/3.5 APO Lanthar, a 125 f/2.5 APO Lanthar Macro, and a 180 f/4 APO Lanthar for SLR cameras.
A recent image from my home area with my new Voigtlander 50mm f2 Apo.
I think a long exposure would have worked better, but I didn't have any ND filters with me that day. Since then, the leaves are now coming on so the willows aren't nearly as yellow/orange - maybe late fall or next spring. Until then, it is what it is.
bjornthun wrote:
Today lanthanum is not used in the apo lanthars, as new materials are used to achieve apochromatic performance.
Whether or not C/V uses lanthanum in their house melts, it remains a component of commercial optical glass. Schott products with lanthanum as the primary additive have "La" in the name. So, N-LAK10 is a lead-free crown glass with La. Elemental additives like fluorine, phosphorus, lead, arsenic, barium, boron, are used to tune the optical properties of the base glass.
Radioactive lenses like the infamous Pentax 50/1.4 were nominally constructed with La glass but the mining process includes another element, Thorium, which is a weak alpha emitter. Those particles are unlikely to escape the lens, let alone penetrate your body, but does yellow the glass over time to a significant extent. Like Pb (lead), Th is a real hazard in lens grinding activity. Modern optical La2O3 is free of Th contamination.
Texas Red Yucca has subtle variations of a coral color. The blossoms are typically less than 1 cm across. So these show some of the characteristics of the 50mm APO Lanthar within its first meter at f/2, f/4, and f/8. I find the f/2 bokeh to be soft and the f/4 to be slightly painterly. I find the handling of color to be careful and nuanced -- none of these images have any exposure, saturation, or contrast adjustments. Of course the resolution when used on my A7m3 is beyond the sensor.
Has anybody used the ApoLanthar50 in rain? What can we expect how durable it is in bad weather? I'm not talking about extremes but just normal european bad weather...
obwohl wrote:
Has anybody used the ApoLanthar50 in rain? What can we expect how durable it is in bad weather? I'm not talking about extremes but just normal european bad weather...
It's not weather sealed, at all. So no, don't expect to use it in the rain, unless you have a lot of disposable money.
