58 f/1.2 Build Log

Leatherman file used to cut a channel into the new mount so that the chip will sit flush

2009-01-08T20:18:54Z

Shao Zhang
Leatherman file used to cut a channel into the new mount so that the chip will sit flush

Channel cut into the new mount for the protrusion of the ROM chip to sit in.

2009-01-08T20:16:47Z

Shao Zhang
Channel cut into the new mount for the protrusion of the ROM chip to sit in.

Lens with old mount removed along with the aperture linkage which is attached to the mount assembly.

2009-01-08T20:19:38Z

Shao Zhang
Lens with old mount removed along with the aperture linkage which is attached to the mount assembly.

View of the ROM chip about to be installed. Data on this chip is 60mm f/1.1 which is close enough as 58mm f/1.2 was not possible with current Minolta/Sony codes.

2009-01-08T20:18:00Z

Shao Zhang
View of the ROM chip about to be installed. Data on this chip is 60mm f/1.1 which is close enough as 58mm f/1.2 was not possible with current Minolta/Sony codes.

New mount mounted to a Minolta 7 film camera with the chip put in place for checking alignment spacing. See how the contacts of the chip are aligned with the pins on the camera. This is th ...

2009-01-08T20:19:37Z

Shao Zhang
New mount mounted to a Minolta 7 film camera with the chip put in place for checking alignment spacing. See how the contacts of the chip are aligned with the pins on the camera. This is th ...

This is 5 layers of aluminum tape which will be used as a temporary spacer. You can use any kind of tape but the thicker ones make this easier.

2009-01-08T20:16:51Z

Shao Zhang
This is 5 layers of aluminum tape which will be used as a temporary spacer. You can use any kind of tape but the thicker ones make this easier.

Here I have cut 3 spacers from the larger piece I made earlier.

2009-01-08T20:18:01Z

Shao Zhang
Here I have cut 3 spacers from the larger piece I made earlier.

Spacers are now placed on the contact side of the chip.

2009-01-08T20:18:47Z

Shao Zhang
Spacers are now placed on the contact side of the chip.

Here I have a piece of tape cut which I will use to hold the chip to the mount while the epoxy glue hardens.

2009-01-08T20:18:57Z

Shao Zhang
Here I have a piece of tape cut which I will use to hold the chip to the mount while the epoxy glue hardens.

Now I place the chip, spacers down onto the tape which is sticky side up.

2009-01-08T20:16:46Z

Shao Zhang
Now I place the chip, spacers down onto the tape which is sticky side up.

Now I place the mount down onto the tape while taking note of the spacing around the chip gaged earlier as this must be precise. Any variation and the chip won't make contact. This is wher ...

2009-01-08T20:20:04Z

Shao Zhang
Now I place the mount down onto the tape while taking note of the spacing around the chip gaged earlier as this must be precise. Any variation and the chip won't make contact. This is wher ...

View from above. This is when you must make sure the chip is as flush as possible to the mount. You don't want too much space there.

2009-01-08T20:20:46Z

Shao Zhang
View from above. This is when you must make sure the chip is as flush as possible to the mount. You don't want too much space there.

Here we has some regular epoxy ready to be mixed.

2009-01-08T20:18:47Z

Shao Zhang
Here we has some regular epoxy ready to be mixed.

Mixed epoxy on a piece of tape. This makes cleanup easy, just throw the tape away.

2009-01-08T20:16:03Z

Shao Zhang
Mixed epoxy on a piece of tape. This makes cleanup easy, just throw the tape away.

Here I have 2 pieces of semi-hard rubber cut to about the size of each side of the chip. I apply a moderate amount of epoxy to the back of the rubber as well as the bottom of the chip where ...

2009-01-08T20:17:30Z

Shao Zhang
Here I have 2 pieces of semi-hard rubber cut to about the size of each side of the chip. I apply a moderate amount of epoxy to the back of the rubber as well as the bottom of the chip where ...

After only a few minutes, the epoxy will be semi-soft but not runny. This all depends on your epoxy but I would recommend you get one that is slower and not super fast curing. While the ep ...

2009-01-08T20:20:25Z

Shao Zhang
After only a few minutes, the epoxy will be semi-soft but not runny. This all depends on your epoxy but I would recommend you get one that is slower and not super fast curing. While the ep ...

When the mount-chip assembly is semi-hardened, you can mount it to the lens and test if the alignment is good. If its not good, you can remove the chip while the epoxy is still a little sof ...

2009-01-08T20:18:28Z

Shao Zhang
When the mount-chip assembly is semi-hardened, you can mount it to the lens and test if the alignment is good. If its not good, you can remove the chip while the epoxy is still a little sof ...