A decent walkabout optic.

The heart warming facts about Nikon’s AFD zoom optics is not only that many choices exist but also that many are insanely inexpensive in mint, used condition.

My mint copy of the 28-105mm f/3.5-4.5 ran me but $78 plus $7 to Amazon for a 62mm UV protective filter. I did not bother getting a lens hood as the one for this lens is huge and mostly useless.

The rational ‘walkabout’ comparison is the 24-120mm f/3.5-5.6 IF lens which adds internal focusing for a smoother feel and extends more at both ends. I have been using the 24-120mm on my Nikon F100 with Ektar film with considerable success. If there’s a complaint it’s the generous dollops of distortion, barrel at the wide end and pincushion at the long. This needs correcting in LR with architectural subjects, a pain but not hard to do.

So how does the 28-105mm differ? Bulk and weight are much the same, the zoom rings displays a tad more stiction owing to the traditional design, the optic is faster at the long end by one stop and adds a handy macro feature.

Here are test images – you can compare with those from the 24-120mm f/3.5-5.6 by clicking here.

In summary edge performance at the wide end is ghastly at full aperture; you need to stop down to f/8 to make it useable. The 24-120mm optic is far better in this regard. The edges from the 28-105mm get progressively better as the focal length increases. Whereas the 24-120mm lens shows chromatic aberration (easily fixed in LR) the 28-105mm has none. Not published here, distortion characteristics disclose that the 28-105 shows mild barrel distortion at 28mm, disappearing at 50mm or longer. That is much better than the 24-120 which barrels greatly at 24mm and pincushions north of 50mm. Neither optic does a particularly good job of rendering out-of-focus areas, both yielding results that are too ‘busy’ for my taste. The 28-105mm lens shows no light fall off at the edges at any aperture or focal length. I have found that the later lens correction profile in LR for the 28-105mm f/3.5-4.5 G VR optic (the one with no aperture ring) works well with this earlier AF D lens.

Handling of both optics on the D700 DSLR and F100 film SLR is excellent. They balance well, zoom rings lack any gritty feel, AF is as fast as you need for all but sports subjects and as I always use aperture priority with aperture control transferred to the lens, the aperture ring on the 28-105mm is easier to access as the lens is less steeply pyramided at that location, making the ring more accessible. Not a big deal in practice.

The macro range on the 28-105mm is accessed by setting the focal length between 50 and 105mm and focus between infinity and 0.5 feet. The switch on the barrel is flipped and you get a very handy macro lens with a focal length range of 50-105mm. The long focal length setting is especially handy as it allows better clearance between the front of the lens and the subject. This is the closest I could get at 105mm:

The magnification ratio computes to 1/4 life size.

Sharpness, even at f/4.5 in the macro range, is excellent – fully useable.

Conclusion: If you need 24mm (which is much wider than 28mm) and useable edge performance near full aperture at the wide end, the 24-120mm is the better choice. If you prefer a minimum of post-processing to remove distortion the 28-105mm is to be preferred. The construction quality and material choices (more plastic) of the 28-105mm are lower but hardly a deal breaker and the macro feature is both useable and the optics excellent. Weights of the two lenses with filters are 16oz for the 28-105mm and 20 oz for the 24-120mm.

It’s a nice choice to have to make with each lens selling for well under $100. I have both!

A curious bunch.

Before Nikon migrated to AF lenses with built in linear focus motors – the AFS series – they marketed the AF and AFD ranges which used a screwdriver linkage in the lens for focusing, the actual focus motor being in the body of better film and digital Nikon SLRs.

The Nikon screw drive motor coupling on the body and in the lens mount.
The film era F100 works well with these and just as well with the latest AFS optics.

While a seemingly Rube Goldberg solution it has proved to be solid and reliable with millions of lenses made. The line started around 1986 and one or two are made to this day.

What is odd about the AF and AFD lenses (the later AFD versions added an enhanced metering chip for better results with flash; otherwise all else was identical) is just how much construction quality varied across the line. I have a half-dozen:

My small AF/AFD collection – 20/2.8, 50/1.8, 85/1.8 and 80-200/2.8 ED IF rear row;
35-70/2.8 and 24-120 f/3.5-5.6 front row.

The mechanical stand-outs here are the 80-200 and 35-70. The former is a two ring zoom, the latter a push-pull design which wears less well, the action becoming sloppy with age. Both are fabulously made and optically as good as it gets. The 80-200 is still sold new at over $1,000, my mint sample running me just $476. The limited range 35-70 is long discontinued (1987-2005) and is often found for under $200. Both are wonderful bargains.

The mechanical quality story with the others is quite a bit different. All these optics have proper aperture rings, a feature sadly deleted from the latest AFS line where apertures are set using one of the command dials on the body of the camera. The 50/1.8 is a piece of garbage. Cheap materials, rattling internals, awful controls. And dirt cheap at $70 used, mint. The 20mm ($230) and 85mm ($270) are mechanically so-so, but focus fast with the 85mm especially pleasant to use in the portrait studio where acquiring focus on the subject’s eyes is a piece of cake with AF especially fast.

And the 24-120mm is a jack-of-all-trades and master of none. It comes with fairly pronounced barrel distortion, rather wobbly construction, an unspectacular f/5.6 at the long end yet it’s invariably found on my D700 or F100 when I want to lug only one optic along. The 24mm comes in especially handy for architectural images and the barrel distortion is easily removed in LR. At well under $100 for a mint one, it’s hard to pass by.

Where Nikon did not compromise is in the optical quality of these lenses. All are at least as good as their MF predecessors with the 80-200 considerably better (and bulkier) than what came before. It’s a weapon, not a lens. The 85mm, with its chintzy external plastic, can almost match the classic 85/1.8 MF at full aperture, equalling it at f/4 and below. And even that piece of garbage, the 50/1.8 is almost as good as the classic 50/2 MF – it’s 1.5 stops less sharp at f/2 compared to the old MF optic, but usable wide open even in the extreme corners. Finally the 20/2.8, which scarcely needs AF owing to large depth of field, is almost as good as the classic 20/3.5 UD MF …. made 21 years earlier.

If MF is not for you, or you are just feeling lazy, none of these economically priced AF/AFD Nikkors will let you down. Just make sure your body comes with the screwdriver coupling or AF will be lost. Sadly, none of these will AF on the new FF Z6/Z7 mirrorless bodies, which lack the screwdrive motor in either the body or the related adapter.

For an index of my Nikkor pieces click here.

Exciting.

The original Noct Nikkor, a 58mm f/1.2, was first sold in February, 1977.

The original Noct Nikkor.

The original design has Ai aperture coupling which was revised to Ai-S in November 1981. The ‘S’ designation designates a linear aperture coupling cam compared with the non-linear original but optically and operationally there was no difference. If you could fit a CPU to the Noct then the Ai-S design would allow control of the aperture with either the aperture ring on the lens or the command dial on the body while still maintaining proper exposure metering. The snag, as the above images disclose, is that there is absolutely no room to install a CPU. Some brave/foolish souls have machined a recess in an arc of the rear element to permit CPU installation but that seems like a drastic solution to a not so real problem, as this is the only Nikkor in F mount to which a CPU cannot be fitted.

The Noct was reckoned by all and sundry – not just Nikon – to be the best standard f/1.2 lens around, and Nikon proudly profiled it in a factory piece which you can read here. The optic’s distinguishing characteristic was low coma at full aperture, as the illustrations in that linked article confirm. A mere 2,461 Ai versions and a further 8,950 Ai-S versions were sold, making the lens an instant choice of the pond scum known as ‘collectors’, which means that used examples sell for $3-7,000. The lens was discontinued in November 1998.

With the introduction of the new Z series mirrorless bodies yesterday Nikon also announced that a new Noct would be marketed in 2019, but this time it would come with a maximum aperture of f/0.95, while retaining the 58mm focal length. Price is unknown but reckon on $5-6,000. Interestingly Nikon will not include AF in the new optic, but the ability in the Z6 and Z7 mirrorless bodies to magnify the focus area in the finder/on the LCD screen means that critical focus wide open should be simple to determine. The lens is a whopper, its bulk dictating the inclusion of a tripod socket:

The new Noct.

The wider diameter of the bayonet mount’s throat on the Z6/7 makes the faster aperture possible.

I can think of a couple of similarly fast lenses in the past – the f/0.95 Canon for their rangefinder cameras (good luck focusing that), reputed to be poor, the f/1.1 Zunow in a Nikon mount, reputed to be awful, the original 50mm f/1.2 Leitz Noctilux with hand ground aspherical elements, suitably priced and excellent optically and the current 50mm f/1.0 Noctilux, like its predecessor available in M rangefinder mount also and superb, as it should be at the asking price of $11,000. The original f/1.0 design of the Noctilux is now F/0.95. How on earth you are meant to focus this optic given the limitations of the Leica M’s optical rangefinder beats me, but $11k gets you bragging rights.

The new Noct promises to be cheaper and better than all comparable predecessors. Exciting times at Nikon. This may be a ‘glamor’ optic with little practical use, but it’s good to see Nikon allowing its designers to stretch for the ultimate.

OK, with some reservations.

The 24-120mm Zoom Nikkor was made from 1996 through 2002. Many regard it as the worst AFD zoom, in much the way the 43-86mm Nikkor is similarly damned in the MF era.

My copy of the 43-86mm zoom shows that, in its Mark II version, the lens is a capable performer, and a lovely compact package on a smaller film camera body.

By contrast, the 24-120mm, with its high 5:1 zoom range, comes with more design compromises. For one, the lens is not constant aperture, the speed falling to f/5.6 at the long end. Second, there is considerable weakness in the edges at 24mm with poor definition and chromatic aberration aplenty. The optic also comes with a reputation for sample variation and the plastic content means there’s a bit of wobble in the extended part of the lens at longer focal lengths.

Shown here at 120mm, fully extended. The lens hood is as useless as these things get.

Then again, mine came mint, boxed, with caps, hood and no fewer than three 72mm filters – UV, IR (!) and ND. Quite why you would want an ND filter with a lens that is already natively slow beats me, but whatever. And the price of entry – and proceeds of exit if it’s not for you – was a very modest $83 shipped. After selling the useless IR and ND filters, my cost was $17!

At 24mm the lens is compact and the zoom action is by a rotating collar rather than trombone action, meaning the lens ages well with none of the slop common in well used push-pull zooms. You can compare sizes with the 85mm f/1.8 AFD, a decidedly superior optic, in this image:

The zoom is at 24mm. Note the dual aperture indexes – blue at 24mm, yellow at 120mm.

The good news here is that the lens is very sharp in the center at all apertures, with negligible chromatic aberration. AF is satisfyingly fast and very welcome given the lens’s small maximum apertures. There is fairly pronounced vignetting in the corners at anything below 50mm but that is easily corrected using Adobe’s lens correction profile in LR. At the edges the story is different. I’m reproducing extreme corner test images here as the center ones are so good. In all cases the lens correction profile was applied. These are 40x enlargements:

As Adobe does not include a profile for this optic with LR, I used that for the later VR version and it works well:

Lens correction profile applied in Lightroom.

At 24mm the extreme corners really suffer at full aperture, only coming into their own at f/11. At medium and long settings things are much better, as disclosed above.

Handling of out of focus areas is rather so-so, if not awful, at the long end using wider apertures. (At the short end it’s tough to get anything out of focus). See above.

So your under $100 investment gets you a lens with a wide zoom range, decent performance at most settings except at full aperture at the wide and, and so-so out of focus handling. But if you want to carry just one wide-range zoom for outdoor snaps, the 24-120mm AFD Nikkor checks many boxes. Use with a polarizing filter is tricky as the front element rotates some 30 degrees through the zoom range. Adjust the filter once the focal length is set.

Comparing the results with images from the Canon 5D using the 24-105mm L auto kit kens, the Canon shows even greater barrel distortion at 24mm and poor corner definition and chromatic aberration in the corners fully open. The Canon is larger and heavier, owing to its constant aperture design and is generally a stop or two sharper than the Nikon. It also costs a lot more.

For a comparison with the Nikkor 28-105mm f/3.5-4.5 AF D lens, click here.