Lens: Voigtlander 125mm f/2.5 Macro APO-Lanthar
Focal Length: 125mm
Widest Aperture: f/2.5
Narrowest Aperture: 22
Aperture Blades: 9
Filter Size: 58mm
Hood: Included, Square
Close Focus Distance: 14.96 inches (38 centimeters)
Reproduction Ratio: 1:1
Focus Throw: ~ 630º
Weight: 28 ounces (794 grams)
Pros: Very fast lens, very sharp lens, 9 blades, close focus, goes 1:1, long focus throw.
Cons: None. Perhaps a little heavy.
I could write a book about this lens, but I will spare you. Next to the new Zeiss Otus-style lenses, the CV-125 is, hands down, the best macro lens I own and I use it all the time, even though I have a shelf full of some of the best macro lenses in the world at the ready. It has no major negatives. It is very fast, very sharp, focuses close, has a long focus throw, reproduces to 1:1, has 9 blades (great bokeh) – the works. If I want to complain, it is a tad on the heavy side, but I am always happy to carry this piece of glass in the field.
The lens is very difficult to find in the Nikon format and also very expensive, with copies now going for $2500 or so. Despite all the good qualities, probably the features that set this lens apart from other fine macro lenses are the fact that it is truly apochromatic (APO) and has such exceptional bokeh (lovely out-of-focus blur in the background).
Of course, IMO, I would add that it has a “magic” quality that words can’t express and a very-long focus throw that makes macros and stacked-photos so very easy. I find it very stable when it comes to handling various types of light in the same frame, like shade with rays of sunlight. This is real workhorse and I have used mine day in and day out for years.
It focuses to 1:1 and lets you get very close in on your subjects. A feature not often mentioned about this lens is that it is also very sharp at mid-range and even at landscape distances. This is the little lens that could and it does. If you ever find one, buy it. You will never be sorry.
Like Bjørn, I have the 90mm and the 180mm Voigtlander APOs, although I don’t use them much. The 180mm is not a close-up lens, which is one reason it does not get much use.
And yes, I learned about this lens from the Fierce Bear of the North, years ago. Thank you!