20 Most Recent Sigma EF-530 DG ST for Pentax TTL Flash Questions & Answers

I don’t usually play with flash that isn’t built in- I prefer natural light, but...if this were me I would: A) take very fine sandpaper and very lightly go one time over all contacts for the flash and camera. B) I would also see if my button batteries in my camera needed changing. As I remember they have something to do with recognizing lenses and flash attachments. C) I would also make sure the batteries in the flash, although changed, were making proper contact with the battery terminals and might also lightly sand those as well since the flash is little used.

It is not normal for the focus ring to move slightly when using autofocus mode on the Sigma 70-200mm f2.8 APO EX lens. This could be caused by a problem with the lens or with the camera body. One thing you can try is to check if the lens mount on the camera is clean and free from debris, as this can cause the lens to move when the camera's autofocus system is trying to adjust the focus. You should also check if your lens firmware is updated to the latest version and make sure your camera firmware is also up to date.

You can't do this yourself. It needs to be carried out by professionals and is a 'clean room' with service techs in full dust proof protective wear. Send it to them. https://www.sigma-global.com/en/support/ ..

Question edited for clarity. You get the Sigma lens for the camera in Canon fit. https://www.google.com/search?q=sigma+lens+af+75-300+for+canon+rebel+xti Can you use Sigma lenses on Canon cameras? Since Sigma lenses are made to be fully compatible with Canon cameras, they are backwards-compatible. This means that you can use a Sigma lens on a Canon DSLR camera. Similarly, the Sigma cameras are backwards-compatible with Canon lenses. Macro adapter loses the AF feature. https://www.google.com/search?q=sigma+lens+af+75-300+mount+adapter+ring+for+canon+rebel+xti

Taking it apart is not the problem - re-assembling it will be. Unless you have access to an optical laboratory, where laser instruments can measure the exact tolerances required, don't even think about it. You will be left with a pile of optical components, and a far higher repair bill than if you had just let the experts sort out the problem in the first place.

Best you don't open it at all as you can damage the lens. Send back to manufacture

Tiffen is a brand of filters not a lens. if your sigma lens will work on 1 camera and not on the other then check the lens mount, electronic contacts, clean them if needed. check the settings in the camera if there needs to be a change.

Take it to a Qualified technician and get it fixed properly. I have this same lens for my Pentax K3, its a very good lens and worth getting it fixed by a proper tech who knows what they are doing.

OK - what about it ?

This is a cycle computer not a camera. Try Sigma-Sport

this was an answer on fixya need instruction sheet for pama sigma 2300 handsfree

Very good question - what is it, and what's wrong with it ?

It depends totally on whether your camera takes interchangeable lenses, and if so, do these lenses have the same fitting ? Your camera manual should tell you if you can fit other lenses to the body - if so, follow the steps to remove the lens which is currently attached, and compare the fitments with this lens and the two others you have been given. If you are still not sure, then take it all to your local friendly camera dealer, who will be able to advise you. Do NOT try to force the new lenses onto the body - this is a sure way to render them inoperable.

Do what anyone else would do. Search for it on Amazon or ebay or any other place you can find the lense....go to the manufacturers page, etc.

What focal length lens is this ?

I believe on some Sigma lenses there is a switch to lock it in a 'Macro' position, usually at the long end of the zoom range. If this applies to your lens, it may be worth checking that this has not been accidentally set. There may also be some information in the manual whichcame with the lens.