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Re-purposed old 17-35mm EX HSM to Sony

Started 9 months ago | Discussions thread
OP DMillier Forum Pro • Posts: 23,871
Re: Re-purposed old 17-35mm EX HSM to Sony
1

Scottelly wrote:

DMillier wrote:

So, I have this ancient SA mount Sigma 17-35mm f/2.8-4 EX HSM in the attic camera museum. Haven't used it for years and it has been no use for adapting because of the SA mount and the electronically controlled aperture.

Then I saw this SA - NEX adaptor on Amazon for £12 quid. And I remembered reading somewhere that you can stop down Canon EF lenses by pressing the doF preview button then quickly removing the lens. And I remembered that allegedly Sigma reverse engineered the Canon AF protocols for their own mount.

I stuck the lens on my SD14, set it to F/8, pressed the DoF button and removed the lens... and it stayed stopped down. The adaptor just arrived and I now have a free 17-35mm, er, f/8-11 lens for my A7rii.

I think this is a good thing.....?

Being an EX lens, I'm surprised the aperture doesn't work, when you use that lens on your Sony camera, by mounting it on your MC-11 adaptor.

£12 adaptor - the MC 11 costs about 5x what the lens is worth. My lens not mentioned on the compatability chart

35mm full-size

  • 12-24mm F4 DG HSM(Art)
  • 14-24mm F2.8 DG HSM(Art)
  • 24-35mm F2 DG HSM(Art)
  • 24-70mm F2.8 DG OS HSM(Art)
  • 24-105mm F4 DG OS HSM(Art)
  • 60-600mm F4.5-6.3 DG OS HSM(Sports)
  • 70-200mm F2.8 DG OS HSM (Sports)
  • 100-400mm F5-6.3 DG OS HSM(Contemporary)
  • 120-300mm F2.8 DG OS HSM(Sports)
  • 150-600mm F5-6.3 DG OS HSM(Contemporary)
  • 150-600mm F5-6.3 DG OS HSM(Sports)
  • 14mm F1.8 DG HSM(Art)*3
  • 20mm F1.4 DG HSM(Art)*3
  • 24mm F1.4 DG HSM(Art)*3
  • 28mm F1.4 DG HSM(Art)*3
  • 35mm F1.4 DG HSM(Art)*3
  • 40mm F1.4 DG HSM(Art)*3
  • 50mm F1.4 DG HSM(Art)*3
  • 70mm F2.8 DG MACRO(Art)*3
  • 85mm F1.4 DG HSM(Art)*3
  • 105mm F1.4 DG HSM(Art)*3
  • 135mm F1.8 DG HSM(Art)*3
  • 500mm F4 DG OS HSM(Sports)

.... which is hardly a surprise as it was on the market in 2001.

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