Reviews > Lens portraits with the Nikon Df
Lens "porn" with the Df: 36-72 mm f/3.5 Nikon SE
pluton:
Was the diopter attachment in front of, or behind the reversed lens?
Bjørn Rørslett:
--- Quote from: pluton on September 07, 2015, 07:57:25 ---Was the diopter attachment in front of, or behind the reversed lens?
--- End quote ---
As seen from the lens photo, the 4T is in front of the lens, then the lens is reversed and some extra extension is added. K4 + K5 in this case, then the "F" mount which here is attached directly to the K4. In "front" of the entire contraption, I added BR-4 + step-down rings to make an improvised lens hood to cut down on stray light and avoid a hot spot, plus having a lever to open the pre-set lens aperture to focus at the widest aperture for a brighter finder view.
John Koerner:
This is a most interesting article. It has ultimately prompted me to search for the highest-quality AI-S zooms, for reversing purposes, rather than the lowest-quality.
According to Nikon literature, and your close-up, the 36-72 mm has a maximum reproduction ratio of just under 2:1 (1.8x), not 3:1.
To get to 3:1 (12mm on your ruler), you'd need a 20-24mm lens, reversed.
The 35mm lenses fluctuate from 2.1x (17mm on the ruler) to 1.8x (20mm on the ruler), according to Nikon literature, as well as clip you posted, depending on the model.
That said, I have ordered a 28-50mm Zoom-Nikkor f/3.5 AI-S (which offers 2.5x to 1.1x lifesize), the 28-85mm Zoom-Nikkor f/3.5-4.5 AI-S, which offers similar, as well as the 25-50mm Zoom-Nikkor f/4 AI-S, which offers 2.6x to 1.1x, when reversed.
This last lens is, by far, the most expensive (and the largest), but supposedly it has the best quality, with almost zero CA, as well as the broadest macro range, reversed.
Time will tell, but this article here is what prompted my interest in a field-adjustable zoom, so thanks for writing it.
Bjørn Rørslett:
You forget the close-up lens, which is an integral part of the set up. Plus the extra extension.
With sufficient extension added, 3X is attainable.
John Koerner:
--- Quote from: Bjørn Rørslett on March 05, 2017, 21:05:09 ---You forget the close-up lens, which is an integral part of the set up. Plus the extra extension.
--- End quote ---
Yes, I did not factor-in a close-up or extension. I was speaking of the lens itself.
--- Quote from: Bjørn Rørslett on March 05, 2017, 21:05:09 ---With sufficient extension added, 3X is attainable.
--- End quote ---
You changed this part here, before I could respond :)
What is shows is 1.8x magnification (top) and a crop from it (bottom).
Sure, with extensions (extra lenses, etc.) this can be improved upon.
I was speaking only of the lens itself.
I have a range of 1:1 to 4:1, with four prime Nikkors, but I am trying to get a ~3:1 range with just one high-quality lens, for field convenience.
I am going to order, and try, 4 different zoom-Nikkors (and this E-Series lens), measure them myself, and compare the differences.
I am suspecting the 25-50mm Zoom-Nikkor f/4 AI-S will be the one I keep, but time will tell.
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