APO EL Nikkor 105mm F5.6N
APO EL Nikkor 105mm F5.6N

APO EL Nikkor 105mm F5.6N

A small but Big Optical Jet Engine
APO EL Nikkor 105mm F5.6N
Excellent Micro contrast Lens
You can get
Brilliant and Gorgeous Images

APO EL Nikkor 105mm F5.6N

APO EL Nikkor sleeping in the northern country

Already long ago, it was the story of early summer 2005. The APO EL Nikkor 105mm F5.6N lens came to me from Hokkaido. The lens was like new.

APO EL Nikkor 105mm F5.6N
December 2005

A Small and Lightweight Lens

I bought my first DSLR Nikon D70 in January 2005. I started shooting with APO EL Nikkor 105mm F5.6N lens and Nikon D70. It's a small, lightweight, ultra-high performance lens that I took with me wherever I went.

APO EL Nikkor 105mm F5.6N
December 2005

Photo taken with Nikon D70, December 2005

Photo taken with Nikon D70, December 2005

Photo taken with Nikon D70, October 2009

Photo taken with Nikon D70, October 2009

APO EL Nikkor 105mm F5.6N
August 2009

Nikon Z Album

I mounted the APO EL Nikkor 105mm F5.6N lens on my Nikon Z 6 and took the following pictures. The APO EL Nikkor 105mm F5.6N lens lens produce very nice images at long distances.

APO EL Nikkor 105mm F5.6N

The following adapters were connected to the APO EL Nikkor 105mm F5.6N lens to get infinity.

Nikon FTZ Mount Adapter
Nikon E2 Ring
BORG M42 (F to L39)
APO EL Nikkor 105mm F5.6N
35.5mm to 40.5mm Step Up Ring
Nikon 40.5mm Neutral Color NC Filter

Infinity:
Nikon Z 6 + FTZ + E2 + BORG M42 (F to L39) + APO EL 105mm F5.6N

Close Up:
Nikon Z 6 + FTZ + E2 + PK-12 + BORG M42 (F to L39) + APO EL 105mm F5.6N

APO EL 105mm F5.6N, ASA 800 F8 1/640 sec. +1.0

Brilliant and Gorgeous Micro contrast Lens

The APO EL 105mm F5.6N lens have an amazing kind of rendition, clean and with great micro contrast. The APO EL Nikkor lens with great micro contrast has much richer colours and tone transitions compared to a general purpose lens.

APO EL 105mm F5.6N, ASA 800 F8 1/500 sec. +1.7

The APO EL Nikkor 105mm F5.6N lens is corrected for chromatic aberration in the near ultaviolet and near infrared ranges.

APO EL 105mm F5.6N, ASA 800 F8 1/640 sec. +1.7

APO EL 105mm F5.6N, ASA 800 F8 1/500 sec. +2.0

The APO EL Nikkor 105mm F5.6N lens provide an extra margin of fidelity resulting in more accurately reproduced color and richer tone.

APO EL 105mm F5.6N, ASA 800 F8 1/640 sec. +1.7

APO EL 105mm F5.6N, ASA 800 F8 1/640 sec. +0.7

APO EL Nikkor Technology

The unexcelled qality of Nikon-built cameras and lenses has greatly contributed to the widespread use of 35mm format photography. Quite naturally, Nikon has responded to the needs og the film processor as well. In ordnary photoengraving lenses, 1 : 1 is the standard magnification. But when used to produce large images, such as in the step and repeat method, a truly sharp image was difficult to ogtain.

To reproduce images as much as ten times the size of the original requires lenses designed for high magnification work with the aberrations fully corrected over the entire range. Apo-EL-Nikkor Lenses have been designed with standard magnifications of 2X (170mm), 5X (210mm and 480mm) and 10X (105mm and 300mm) to provide a wider range of application. Working in such a powerful magnification range opens the possibility for a host of problems due to insufficiencies in the reproducing lens.

Apo-EL-Nikkor Lenses surpass this challenge with highly ellective aberration correction and extremely sharp resolving power. These lenses are designed exclusively to provide superior performance when making critical photoenlargements or exacting color separations from small original film formats. Optimum performance is available not only at the standard magnifications but is maintained throughout the entire range. Apo-EL-Nikkor Lenses are available in five focal lengths for various sized originals.

Full spectrum resolution

In order to make color enlargements from a color original, the original must be color separated into three elements - red, green and blue. Up till now, apochromatic lenses like Apo-Nikkor lenses with chromatic aberration corrected for three colors have been used for processing. However, in the combined enlargement/color separation process with small originals, even a minute detect in the lens in magnitied enormously, since these lenses are originally designed for ue at around 1 : 1 magnification.

Apo-EL-Nikkor lenses are designed for color separation work involving high magnification and, through a combination of special Nikon-produced optical glasses and an ingenious optical design, chromatic aberration is corrected not only for the three primar colors, but for the entire visible range of the spectrum. Moreover, Apo-EL-Nikkor lenses are corrected for chromatic aberration in the near ultaviolet and near infrared ranges since the spectrum sensitivity of film emusions is not always identical to that of the humaneye. These lenses provide an extra margin of fidelity resulting in more accurately reproduced color and richer tone.

The outstanding resolution, higher than that of any existing original film, is due to the fact that nearly perfect elimination of all other aberrations is as well made possible by limiting the picture angle of the lenses. Consequently, there is no significant image displacement or difference in image size, regardless of magnification.

Full aperture brightness

The optimum performance of Apo-EL-Nikkor lenss is designed to be obtained at their full aperture of f/5.6. The maximum aperture of f/5.6 provides plenty of light for processing work despite the usual insufficiency of light inherent in making enlargements, thus saving exposure time. Furthermore, light transmission at the circumference of the lens is as good as that at the center, and off-axis light fall-off is minimized.

Nikon Integrated Coating (NIC)

As further insurance for accurate reproduction, a multi-layer coating is applied to glass-to-air surfaces whereever needed. The occurrence of internal reflection is virtually eliminated and thus images remain sharp, clear, and contrasty over the entire picture area.

This additional feature of Apo-EL-Nikkor lenses offers the extra measure of performance necessary in performing demanding photo enlargements and color separation work.

  LENS and APERTURE   FILM SIZE
  APO EL 105mm    F5.6   24 x 36 mm
  APO EL 105mm    F8   56 x 56 mm
  APO EL 210mm    F5.6   56 x 56 mm,  24 x 36 mm
  APO EL 210mm    F8   90 x 120mm  (4 x 5 inch)

Mounting the lens on a process camera

Enlarger-type process camera :  Attach the lens in the usual way with its rear mount facing the camera. The Apo-EL-Nikkor 210mm f/5.6, 300mm f/5.6 and 480mm f.5.6 lenses are supplied with a flange to facillitate attachment to the camera using nuts and bolts.

Darkroom process camera :  All lenses can be attached with the front mount facing the camera. Remove the ornamental front ring ( for the 170mm lens, this is not necessary ) and screw the lens into the process camera. A flange can be atached to the front mount of the Apo-EL-Nikkor 210mm f/5.6, 300mm f/5.6 and 480mm f.5.6 lenses. The Apo-EL-Nikkor 170mm f/5.6 requires an intermediate ring of 52mm attachment size for mounting.

Referenced the following materials;
Nikon Apo-EL-Nikkor Lenses
for color separating/screening/enlarging
Nippon Kogaku K. K.

Specifications

The old type lens and the new type lens exist in APO EL Nikkor 105mm F5.6 lens. The APO EL Nikkor 105mm F5.6N lens introduced in this article is the new type lens.

(1) Old type Lens

APO EL Nikkor 105mm F5.6

Focal length :  105 mm
Maximum aperture ratio :  1:5.6
Minimun f/stop :  f/45
Aperture scale :  1/3 step
Lens construction :  8 elements in 4 groups
Standard magnification :  10 X
Usable magnification range :  5 - 20 X
Picture angle :  40°
Corrected chromatic aberration range :  380 - 700 nm
Vignetting :  0% (at f/8)
Distortion :  +0.06%
Size of originals :  80 mm⌀
Image distance at standard magnification :  1265.6 mm
Filter size :  d=40.5 mm p=0.5 mm
Mount :  Leica L39 screw mount
Weight :  315 g
Diameter :  51 mm
Length :  60 mm
Release date :  Jun 1971
Price :  207,000 Japanese YEN (1974)
Price :  207,000 Japanese YEN (1977)

(2) New type Lens

APO EL Nikkor 105mm F5.6N

Focal length :  104.8 mm
Maximum aperture ratio :  1:5.6
Minimun f/stop :  f/32
Aperture scale :  1/3 step
Lens construction :  8 elements in 4 groups
Standard magnification :  10 X
Usable magnification range :  5 - 20 X
Picture angle :  47°
Corrected chromatic aberration range :  380 - 750 nm
Vignetting :  0% (at f/8)
Distortion :  -0.07%
Size of original :  80 mm⌀ (at f/5.6)
Size of original :  100 mm⌀ (at f/8)
Image distance at standard magnification :  1265.3 mm
Filter size :  d=35.5 mm p=0.5 mm
Mount :  Leica L39 screw mount
Weight :  140 g
Actual weight :  139.5 g
Release date :  1980
Price :  207,000 Japanese YEN (1987)

APO EL Nikkor 105mm F5.6N Lens Construction

Size comparison of Old type (Left) to New type (Right)
Photo: Copyright (c) 2020, martini038/flickr, All Rights Reserved.

35.5mm Filter

The filter size of the APO EL Nikkor 105mm F5.6N lens is 35.5 mm (P=0.5). This is a rare filter size for Nikkor lenses. I bought a step-up ring 35.5 mm to 40.5 mm. It is important that the filter thread pitch is 0.5 mm.

35.5 mm - 40.5 mm Step-Up Ring

Reversing the Lens

All APO EL Nikkor lenses can be attached with the front mount facing the camera. Remove the ornamental front ring and screw the lens into your camera.

If you unscrew the ornamental front ring of the APO EL Nikkor 105mm F5.6N lens, you'll find the Leica L39 screw mount. Now you can reverse the lens and mount it on your camera.

Reversing the Lens

Reversed APO EL Nikkor 105mm F5.6N

Distant scenery

APO EL Nikkor 105mm F5.6N

I photographed a distant railway bridge under winter light.

APO EL 105mm F5.6N, ASA 800 F11 1/2500 sec. -0 +0

APO EL 105mm F5.6N, ASA 800 F11 1/1250 sec. -0 +0

APO EL 105mm F5.6N, ASA 800 F11 1/2500 sec. -0 +0

The scenery is bright under the spring light.

APO EL 105mm F5.6N, ASA 800 F8 1/5000 sec. -0 +0

APO EL 105mm F5.6N, ASA 800 F8 1/3200 sec. -0 +0

Strong and Heavy Images

The APO EL Nikkor 105mm F5.6N lens is also good at making heavy-duty depictions. From identification and surveillance of aircraft, to photo recordings of unnamed old buildings, the presence of ultra-high performance lenses is unwavering.

APO EL 105mm F5.6N, ASA 800 F11 1/1600 sec. -0 +0

APO EL 105mm F5.6N, ASA 1000 F8 1/4000 sec. -0.3

APO EL Nikkor 105mm F5.6N

APO EL Nikkor 105mm F5.6N

APO EL Nikkor Gallery

I'd like to introduce Mr. martini038-san to you. He is employing the industrial Nikkor lenses to take a great railway photos. A lot of his nice pictures are open to the his flickr site. The following all pictures were taken by him with his APO EL Nikkor 105mm F5.6N lens.

Japan Freight Railway EF66-26, September 2014
Nikon D810 + APO EL Nikkor 105mm F5.6N (at F6.3)

Original image (7360 x 4912, 10.4MB) is Here
Photo: Copyright (c) 2020, martini038/flickr, All Rights Reserved.

You can see the excellent micro contrast ability of APO EL Nikkor 105mm F5.6N lens.

Japan Freight Railway EF64-1017 #8865 + EF66-33, April 2013
Nikon D800E + APO EL Nikkor 105mm F5.6N (at F8)

Original image (7360 x 4912, 18.4MB) is Here
Photo: Copyright (c) 2020, martini038/flickr, All Rights Reserved.

Mount Ibuki, January 2010
Nikon D3 + APO EL Nikkor 105mm F5.6N (at F5.6)

Photo: Copyright (c) 2020, martini038/flickr, All Rights Reserved.

Mount Ibuki, January 2018
Nikon D850 + APO EL Nikkor 105mm F5.6N (at F8) , ISO 200

Original image (8256 x 5504, 32.2MB) is Here
Photo: Copyright (c) 2020, martini038/flickr, All Rights Reserved.

JR N700A, September 2012
Nikon D800E + APO EL Nikkor 105mm F5.6N

Original image (7360 x 4912, 8.6MB) is Here
Photo: Copyright (c) 2020, martini038/flickr, All Rights Reserved.

Toho Zinc Annaka, August 2018
Nikon D850 + APO EL Nikkor 105mm F5.6N

Original image (8256 x 5504, 7.2MB) is Here
Photo: Copyright (c) 2020, martini038/flickr, All Rights Reserved.

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Copyright Michio Akiyama, Tokyo Japan 2020