PetaPixel

Silent Changes: The Subtle Modifications Made to Camera Gear Over Time

silentchange

Every so often I get an email asking me to jump in on some forum argument or other. I rarely do that because of the language barrier.

Two of the common languages spoken on forums are CAKWAF (Complete, Absolute Knowledge Without Any Facts) and AFIDAWAB (Any Facts I Don’t Agree With Are Bullstuff). Since I am not fluent in those languages, I tend not to get involved in the more, uhm, enthusiastic online discussions. But sometimes I can’t help myself, repeating the behavior of adding facts to a ‘vigorous’ discussion and always expecting a different result.

This happened recently when a discussion occurred about what the original poster called ‘silent upgrades’ to lenses. As someone who takes apart lenses and cameras for my day job, I did confirm to that person that over the lifespan of a lens, some internal changes may occur and the camera companies don’t make announcements about them. (I don’t like the term ‘silent upgrade’ because such changes aren’t always an upgrade, it may be something as simple as a new vendor supplying a slightly different part. There also seem to be times when the change is actually a downgrade.)

Most of the responses to my statement were written in CAKWAF and AFIDAWAB. Responses claimed with absolute certainty there were laws that prevented any changes once a lens was released unless they were announced (there aren’t). Other people, based on owning two different copies of a certain lens, stated with absolute certainty there were never any changes in the 10-year production cycle of that lens (there were, I’ve seen them). Rather than responding with words, I thought it would be simpler to just take apart a couple of lenses.

The Canon 85 f/1.8 is a very good, reasonably priced lens that’s been popular for two decades. Its external appearance and optical formula have been unchanged for that entire time. It also has a tendency to get dust under the front group, so (because I run a rental house and people expect to rent clean lenses – not because the dust mattered to photographs) we take them apart to clean them quite often. So here are two copies of the Canon 85mm f/1.8 with the front group removed for cleaning. One of these things is not quite like the other.

A 6-month old Canon 85mm f/1.8 (left) and an 18-month old copy (right).

A 6-month old Canon 85mm f/1.8 (left) and an 18-month old copy (right).

While identical on the outside, identical optically, and identical in function, the newer one seems to be missing a circuit board. Notice the slot that the connecting wires go through on their way to the main PCB (circuit board) on the back of the lens is still there. There just aren’t any wires going through it.
If we take the mount of the two lenses off, we can see other differences in the PCBs.

A 6-month old Canon 85mm f/1.8 (left) and an 18-month old copy (right).

A 6-month old Canon 85mm f/1.8 (left) and an 18-month old copy (right).

Obviously the newer version doesn’t have the 5 soldered wires coming up from the accessory board (6 o’clock on the older version) because the circuit board isn’t there. The new PCB board doesn’t even have the solder points to attach those wires and there are some other minor differences in the circuit traces on the PCBs. I didn’t take the PCBs out to show you the bottom side, but if I had you would notice that all the functions of the DC/DC conversion board (the board missing from the newer copy) have been added to the main PCB in the newer copies.

Does it make any difference whatever in how the new copies work compared to the old copies? Nope. I suspect it’s simply that advances in electronics since the lens was first released make it simpler and more cost effective to eliminate the secondary DC/DC conversion board and incorporate those functions into the main PCB. It hasn’t been done to address any reliability issues (the 85 f/1.8 is a rock, it hardly ever breaks) and it doesn’t change function at all — it’s probably just more cost effective.

Sometimes changes like this that occur during the life of a lens (or camera) are done to address a problem. I can think of a half-dozen examples off of the top of my head — a few announced by the manufacturer but most not announced.

These aren’t always ‘secret upgrades’ as the paranoid among us like to think, but sometimes they are. Most often, though, they’re simply a change in subassembly supplier or a more effective way to manufacture a part, like this one.


About the author: Roger Cicala is the founder of LensRentals. This article was originally published here.


Image credit: Objective lens by Steys


 
  • http://www.bobcooleyphoto.com/ bob cooley

    Sure – you SAY that… but you are really just a lackey for the optical-industrial-complex! :)

    J/K – great article, Roger.

  • CrackerJacker

    This is why I wrap my lenses in tinfoil, to keep the NSA from intercepting my photons!

    Really, though, Roger, thanks for the peek inside!

  • oldtaku

    Those are obviously photoshops since we know the lenses don’t change.

    Okay, seriously, it’s interesting that it changes so much in just a year.

  • Tomas

    Why they can’t modify canon 50 f/1.4 Autofocus this lens suffer from erratic AF shift

  • Donald

    It’s true what the author writes, all manufactured products experience real modifications during their lifetime. Only safety certified products such as Intrinsically Safe (PetaPixel article about 1 month ago by ocean platform oil drilling photographer) have laws that govern product changes, but they are still possible.

    Every company employs manufacturing engineers whose role includes assessing ongoing manufacturing problems, failed tests, or simple reports of difficult assembly steps and to develop solutions both instantly and long term. Occasionally this includes feedback to the product development group or “Sustaining Engineering”.

    Upon further assessment, an actual engineering part design change may be implemented, either new design or borrowed from other ongoing research and development projects. This is usually a business decision as cost to implement is not quantifiably recouped, i.e. there’s no immediate price increase, only an intermittent cost reduction in scrap or rework parts.

    As an industrial designer and mechanical engineer of 25+ years, I’ve both seen and done this, and to optical and camera systems. These type of changes are internal, never announced to the public.