EEVblog #849 - Sony E-Mount Camera Lens Teardown

[EEVblog]

What's inside a Sony SELP1650 compact zoom E-Mount camera lens?
How does the zoom mechanism work
How does the Sony Optical Steadyshot image stabilisation system work?
http://www.sony.com.au/product/selp1650

[max666]

Awesome stuff! Great teardown!

[daqq]

Thanks Dave for the teardown.

Could someone guess at the function of the part in the picture? It's like a pad for a part, but it's connected. There are more of them on the board. It's not a test pad (unless it's an unpopulated pad for a development test point), so, why?

[G7PSK]

The groove cut in the sleeve is an axial cam not a tread or worm.

[plazma]

Thanks Dave for the teardown.

Could someone guess at the function of the part in the picture? It's like a pad for a part, but it's connected. There are more of them on the board. It's not a test pad (unless it's an unpopulated pad for a development test point), so, why?

I use these in designs. It's a 0R resistor that can be cut for measurements/debugging and can be replaced with a solder bridge or resistor afterwards.

[Fungus]

I've pulled stuff like this apart before.

The mechanics always amazes me, I have no idea how they design that sort of stuff, It seems impossible.

[djQUAN]

Thanks Dave for the teardown.

Could someone guess at the function of the part in the picture? It's like a pad for a part, but it's connected. There are more of them on the board. It's not a test pad (unless it's an unpopulated pad for a development test point), so, why?

Where I used to work, we usually add 0 ohm resistors in series with data lines and change this to ones with resistance values (or ferrite beads) if there are any problems during EMC evaluation. If it already passes with the 0 ohm resistor, in the later revisions of the PCB, the pads will simply be bridged with a track to save cost on the part itself and the cost of mounting it.

[Fungus]

And a Teardown Tuesday video actually available on a Tuesday. Is that a first?

Nah, this is last Tuesday's video, a week late.

(A stopped clock is right twice a day...!)

[PA0PBZ]

I use these in designs. It's a 0R resistor that can be cut for measurements/debugging and can be replaced with a solder bridge or resistor afterwards.

But the pads are already connected, they sit on a common trace so clearly whatever component you put on there does exactly nothing.

[Fungus]

I use these in designs. It's a 0R resistor that can be cut for measurements/debugging and can be replaced with a solder bridge or resistor afterwards.

But the pads are already connected, they sit on a common trace so clearly whatever component you put on there does exactly nothing.

Luckily there's no component on it. That will save money.

[PA0PBZ]

I use these in designs. It's a 0R resistor that can be cut for measurements/debugging and can be replaced with a solder bridge or resistor afterwards.

But the pads are already connected, they sit on a common trace so clearly whatever component you put on there does exactly nothing.

Luckily there's no component on it. That will save money.

Reading plazma's reply again I think it means cutting between the pads, which makes sense but not something I'd like to try on a flex pcb. 

[AF6LJ]

That's really Cool Dave.

[Starman]

Maybe you could hook up the image stabilizer portion to a joystick  or linear slide pots, and use it as an electrically movable microscope stage !

[max_torque]

Two questions / comments:


1) the tooling for those precision injection moulded parts must have cost $$$$ ! (especially the axial cams / tracked rings)
2) did you get it all back together again, and does it now work?? 

[AF6LJ]

Maybe you could hook up the image stabilizer portion to a joystick  or linear slide pots, and use it as an electrically movable microscope stage !

Hay;
That's a cool idea. 

[ivaylo]

The few times I've tried to "service" lenses I failed miserably. The one I was sure I can clean turned out to have a six threaded focusing barrel so focus went to hell. I did try all six ways, but it was a film camera and developing the film just showed it was way off. Not to mention the fun of chasing spilled iris leaves. It was an underwater lense, glad the shop could fix it after me. Those guys have assembly guides, specialized tools, focusing stands and what not.

[Oskar]

I really enjoyed this teardown.  Lens are amazing.  I've taken a few apart, all were broken to begin with.  Tons of fun.

Thanks again for the unique teardown!

Oskar

[max666]

...  I've taken a few apart, all were broken to begin with. ...

Suuuure! That's what they all say   

[PeterL]

I stumbled upon this Youtube channel:
https://www.youtube.com/channel/UC2z5c8YEA5dQLi36DYpsFJg

He only has a few video's yet, but he really does a really good job of tearing down and fixing camera's and lenses. He really knows what he's doing, and let's the viewer learn along.