I bought it and put it on a sigma 70-300 f/4 5.6 dg macro telephoto zoom lens,it goes on but won't tighten up?
1060548
As long as it stays on the lens and doesn't drop off you are probably OK. A polarizing filter needs to turn, that's how you adjust it to the maximum effect.
1060549
I've never personally used the filter on a sigma lens, but I'd assume it works the same as on a Canon lens. You will notice that the filter has two moving parts and that the front ring spins continually. The the back ring that is attached to the glass should tighten onto your lens and become secure, while the front ring will continue to spin even after the rear ring has been tightened.
1060550
I use mine on my 50mm and have the same thing but I haven't had any problems with it.
820658
The lens cap size wont change. With mine I noticed I had to squeeze the tabs a little harder to close them a bit more than I normally would. If that's not the case, I'd say it was defective. Since it screwed onto your lens, look at the ring closely and see if it looks flared or bent. If it doesnt, maybe its the lens cap itself not opening enough. Anytime your use a filter, the cap size will stay the same as whatever mm lens you are using.
2120764
Its a macro lens. Try getting as close as posible , you almost have to be touching the object with the lens for it to focus
1570876
Yes there should be a small screw next to the lens..tightening and loosening should focus it for you
706911
If you are trying to slide it by pushing on the lens itself it wont slide, you have to slide it from where the lens meets the mount, then it should slide, if it still is not sliding, then send it back....
1414270
I would have to say NO that it does not stretch, per say. However, I purchased the largest size to fit a Sigma 70-300 mm lens and this was the largest that I could find, so I took a chance on it accepting that lens and it did work. The lens is fairly well cushioned once in place.
382648
Screw in center needs to be tight...no wobbly...and the rotation quit on mine after a short time (couple weeks of 24/7)...a little light lube might get it going again...I suggest 3-in-one oil...sewing machine oil...don't get it on the lens or it will crap it out...I used P-B Blaster and it wasted my lens...but it quit spinning again very shortly ,so that was a moot point...hthy...Hobbiehubbcapp.
164446
I have it on 3 D300, 1 D300S, and 2 D7100 bodies. It came off one of the D300 bodied with an 18-200 on it. I hate to over tighten these or tripod screws, so I check them often. The person who did have it come loose, said they had not checked it, inspite of my warning. Hope that answers your question.
1359463
I stupidly bought this teleconverter and it fits my Nikon D800 but will not attachj to my Sigma 170-500mm lens. It seems the lens elements on both ends protrude and will not allow a connection. It probably only attaches to lenses with an internal motor.
878743
As it was said any times in the customer's reviews (including mine), the adaptor does not fit perfectly and you have to do a few tries before getting used to it. The main point is to put the lens aperture control finger on the good side of the adaptor aperture control pin to allow the aperture control dial to rotate. If it does not rotate, you are on the wrong side. Hope this will help. Richard.
959696
It does not fit on the lens. You need to put it either on the base of the camera or flip it over and the other side fits the lens. You need to remove the lens and put the ring on the smaller end and then fit the lens back on.
1532900
This collar is for the 70 300 L lens, I think it won't work with your lens.
1069092
Hello hello Rmauma...! The Little push-button on the side... is working... like the release-button... on your camera... Push it In... and turn the lens... same way... as your normal lenses. If the button... or the adapter is stuck... Perhaps try... to twist the adapter... just a fraction... in both directions... while pressing... on the button. This can give the Little locking pin... enough room... to Work. Now take the lens... with the adapter... one hand on each... close your eyes... and let your hands Work... Hope this will help... Greetings... Jakob.
1201682
The best thing I have found, is to find out the mm of the base you want to mount it to, and get the same size. Are you mounting it to the camera, or another lens? I believe you are trying to go too the camera it's self for close ups. Or are you trying to use it with another lens also? With just what you have given me, I am not sure. With just this lens you do not have A/F or stabilizer.
13320
I had no issues with mine. If it got put on a little cock-eyed and the threads aren't lined up right, it could seem stuck. I wish I could help. Maybe a local camera store could give you more help without ruining your threads. Good luck.
1300382
Hi,My lens is currently in for repair because the zoom actually broke one time when I tried to turn it. I found that mine got worse over time. If you've had it more than a couple months you probably won't be able to return it (I ordered mine from Amazon w/fulfillment through 47th St. Photo). But if it is less than a year old Sigma will repair it for free. Hope that helps!
888895
I have not been happy with the auto focus. I have used this lens with both a cannon T3 and a cannon 70D. The problem is it will no come into focus. I have contacted sigma asking if there is anything that can be done about this. I have not yet gotten a reply.