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Because third party lenses cannot leverage the camera body to update. Sigma has a dock that allows updates to their lenses in this fashion however.

mahmoudhossam 4mo ago
Only for their old "Art" lenses, the modern "Contemporary" lenses can leverage the camera body update mechanism and only need a file on the SD card containing the firmware update.
- Sharlin 4mo ago
  "Contemporary" lenses aren’t more modern that "Art". The monikers were introduced at the same time, along with "Sports". Rather, "Art" is Sigma’s high-end line, similar to Canon’s "L". "Contemporary" on the other hand is a somewhat euphemistic term for "consumer" or "affordable".
Gigachad 4mo ago
You can update sigma lenses through Sony camera bodies but it requires running a program on your desktop with the camera plugged in and it’s a bit of a pain. Especially on macOS where it requires enabling kernel extensions. Would have been nice if Sony just let you drop a file on the sd card to load an update.
- CobaltFire 4mo ago
  Didn't realize this, thanks!
Lammy 4mo ago
I suppose it depends on the system? I have updated Sigma, TAMRON, and XiaoYi lenses on my Panasonic and Olympus MFT bodies, as well as Panasonic and Olympus with each other: https://support.jp.omsystem.com/en/support/imsg/digicamera/download/software/firm/e1/ https://support.jp.omsystem.com/en/support/imsg/digicamera/d... (Sadly not an exhaustive list. I have firmware for several more lenses stashed away in my archive, but the upgrade mechanism is the same.)
- CobaltFire 4mo ago
  I shoot the m43 system (have since the GH2, then E-M5, E-M1, and now a G9 II) and didn't realize this. I only have one lens tight now (I tend to stay small on my system but this is a low point) but I'll keep it in mind. Thanks for the info!
  - Lammy 4mo ago
    Here's a counter-example, too: Metabones EF↔MFT speedbooster that has its own USB port and update+config app: https://i.ibb.co/t7mDFLJ/image.png https://i.ibb.co/t7mDFLJ/image.png https://i.ibb.co/PsSH2M3R/image.png https://i.ibb.co/PsSH2M3R/image.png
    - CobaltFire 4mo ago
      That one I'm aware of. I used to own one!

mahmoudhossam 4mo ago

Only for their old "Art" lenses, the modern "Contemporary" lenses can leverage the camera body update mechanism and only need a file on the SD card containing the firmware update.

Sharlin 4mo ago
"Contemporary" lenses aren’t more modern that "Art". The monikers were introduced at the same time, along with "Sports". Rather, "Art" is Sigma’s high-end line, similar to Canon’s "L". "Contemporary" on the other hand is a somewhat euphemistic term for "consumer" or "affordable".

Gigachad 4mo ago

You can update sigma lenses through Sony camera bodies but it requires running a program on your desktop with the camera plugged in and it’s a bit of a pain. Especially on macOS where it requires enabling kernel extensions. Would have been nice if Sony just let you drop a file on the sd card to load an update.

CobaltFire 4mo ago
Didn't realize this, thanks!

Lammy 4mo ago

I suppose it depends on the system? I have updated Sigma, TAMRON, and XiaoYi lenses on my Panasonic and Olympus MFT bodies, as well as Panasonic and Olympus with each other: https://support.jp.omsystem.com/en/support/imsg/digicamera/download/software/firm/e1/ https://support.jp.omsystem.com/en/support/imsg/digicamera/d... (Sadly not an exhaustive list. I have firmware for several more lenses stashed away in my archive, but the upgrade mechanism is the same.)

CobaltFire 4mo ago
I shoot the m43 system (have since the GH2, then E-M5, E-M1, and now a G9 II) and didn't realize this. I only have one lens tight now (I tend to stay small on my system but this is a low point) but I'll keep it in mind. Thanks for the info!
- Lammy 4mo ago
  Here's a counter-example, too: Metabones EF↔MFT speedbooster that has its own USB port and update+config app: https://i.ibb.co/t7mDFLJ/image.png https://i.ibb.co/t7mDFLJ/image.png https://i.ibb.co/PsSH2M3R/image.png https://i.ibb.co/PsSH2M3R/image.png
  - CobaltFire 4mo ago
    That one I'm aware of. I used to own one!