SIGMA CLIENT NOT WORKING LICENSE

It has been said (I don't know whether this is the correct explanation) that back in the day, unlike Tamron and Tokina, Sigma refused to pay the camera manufacturers to license the lensmount designs, and instead reverse-engineered them-and that sometimes the reverse-engineering missed certain subtle points or non-obvious specifications, causing these problems. Apparently Tamron and Tokina have had very few if any similar problems.

These problems with older Sigma lenses are widely reported. At various times, various Sigma lenses have not worked properly (in some cases, almost not at all) on many of the newer Canon, Nikon, and Minolta / Konica Minolta / Sony bodies. Just so you understand, this is not really a Sigma-lens-on-Canon-body issue-it is a Sigma issue, plain and simple. Your camera to portrait mode, and there is so much light to expose at f/2.8 with the fastest shutter speed available in yourĬamera (perhaps 1/8,000s?) you will notice one of two options in your viewfinder:Ī) The aperture closes to f/4 or whatever needed to obtain the proper exposure, orī) The maximum Shutter speed blinks, warning you that the photo will be overexposed. I guess we can't answer this without knowing how you set your camera to f/2.8. While the lens shouldn't matter in this case, sometimes the vertical shutterīy the way, in your second post you ask if you will only be able to take photos at f/2.8 or if you will be able to use all theĪperture range. Using a battery pack with a vertical shutter. On the other hand, if you mean in portrait orientation (having the camera in vertical position), I would also ask if you are Then that would make some sense as there is some behavior pattern you discovered.

SIGMA CLIENT NOT WORKING MANUAL

Lens, which is the diafragram aperture you said you were able to use (didn't said if in Av or Manual mode) with thatĬamera-lens combination. With a large aperture, then the camera will try f/2.8 as a starting point, as that's the widest aperture supported by your The camera portrait mode (the one with the portrait icon) will try to expose for a shallow depth of field, which is achieved While the Sigma incompatibility with certain EOS bodies was a well known problem back in the day of film cameras, Iĭon't remember ther was any workaround to make it work, then is quite odd that you could use it anyhow. Portrait, or do you mean your camera must be in a vertical position (also known as 'Portrait Orientation') for you to take Justin, first a clarification: When you say 'Portrait Mode', do you mean the camera mode dial is set to the icon of a

Sigma client not working