Sigma mirror telephoto 600mm /F8

[steel]

Hi,
I have a minolta mount Sigma Lens 600mm fully manual with a fixed F8 aperture. The mount do not have any elecrtical contact, without this electronic chip, my Dynax 7D show a "no lens attached" error. Is there a way I could get this lens to install a chip? to fool the camera?

[Drudkh]

how about turning off the shutter lock?

[steel]

Originally Posted by Drudkh how about turning off the shutter lock?

Drudkh!!!! you are a genius!!! yes now I am happy.
I had sent to Sigma and Minolta service and support and still no reply from them yet.

Thanks a million!!!

[Drudkh]

no prob, i also dunno about this until recently Flare mentioned it to me.
hope you have a good time shooting.

[steel]

Originally Posted by Drudkh no prob, i also dunno about this until recently Flare mentioned it to me. hope you have a good time shooting.

Sigma USA replied saying that the lens need an upgrade and they are willing to do it for free. So far the nearest service center is at Hong Kong.

[blurblock]

Originally Posted by steel Sigma USA replied saying that the lens need an upgrade and they are willing to do it for free. So far the nearest service center is at Hong Kong.

Wrong .... the nearest service center is at bukit merah ..... anyway ..... how on earth is a chip going to help on a manual lens?

[steel]

Originally Posted by blurblock Wrong .... the nearest service center is at bukit merah ..... anyway ..... how on earth is a chip going to help on a manual lens?

Yah.. juz found out, its at Bukit Merah...15mins from my office..
Dunno what the chip could do, maybe tell the camera its a fixed F8 so that the camera can compute the matching shutter speed? curious...

[Drudkh]

but in the first place there's no connection interface for the lens to tell the camera.

[steel]

OK Sigma Singapore replied, they can't do anything to this lens.

[blurblock]

Originally Posted by steel OK Sigma Singapore replied, they can't do anything to this lens.

They shouldn't be doing anything to the lens ...... There is nothing wrong with the lens, you just need to turn off Shutter lock ;D

[steel]

Originally Posted by blurblock They shouldn't be doing anything to the lens ...... There is nothing wrong with the lens, you just need to turn off Shutter lock ;D

I know..jus try....I was hoping the camera can do its own metering based on F8..you know juz like Aperture piority.

Anyway, when I switch to manual mode..the EV bar moves..although the camera dunno what aperture the lens is having.

So far by following the EV bar I can get decent exposure from the 7D.

Also, I find that focusing onto distance object the image appear hazy..maybe would get a UV filter