I can't change the focal length on my Sigma 70-300mm F4-5.6 DG OS mounted on my Nikon D3200- it is stuck at about 140mm?
83928
There is a lock somewhere outside the lens near the body. This might prevent you from changing the focal length.
54375
It depends if you have other lenses with different focal distances but on a crop sensor it will be about 56mm. I know someone with a 70D who only uses this lens and it works great for him.
2060950
Hello... To be honest, I returned the lens because I could not figure it out and I realized I bought the wrong lens... Good luck...
45803
Hi David,Not that I'm aware of. My lense, lent to a mate with a 7100, worked no problem to produce some comparative test images for him against a Nikon 70-200 and he has subsequently gone and bought a 50-150 on the basis of that test! The dealers here in Rome (I've spoken to two) have been perfectly happy to use their USB mounts to update lenses for customers for free. I don't know if that is the case in the UK but I would imagine so, so if you were to find you had an issue (which I believe to be an unlikely scenario) I'd suggest taking it to a Sigma dealer and ask him to update it for you but I really don't think you will find it necessary.Happy New Year.Will Hi David,Not that I'm aware of. My lense, lent to a mate with a 7100, worked no problem to produce some comparative test images for him against a Nikon 70-200 and he has subsequently gone and bought a 50-150 on the basis of that test! The dealers here in Rome (I've spoken to two) have been perfectly happy to use their USB mounts to update lenses for customers for free. I don't know if that is the case in the UK but I would imagine so, so if you were to find you had an issue (which I believe to be an unlikely scenario) I'd suggest taking it to a Sigma dealer and ask him to update it... » Read More Hi David,Not that I'm aware of. My lense, lent to a mate with a 7100, worked no problem to produce some comparative test images for him against a Nikon 70-200 and he has subsequently gone and bought a 50-150 on the basis of that test! The dealers here in Rome (I've spoken to two) have been perfectly happy to use their USB mounts to update lenses for customers for free. I don't know if that is the case in the UK but I would imagine so, so if you were to find you had an issue (which I believe to be an unlikely scenario) I'd suggest taking it to a Sigma dealer and ask him to update it for you but I really don't think you will find it necessary.Happy New Year.Will « Show Less
2038011
Your problem may be the same as mine: although the box was labeled as an extension for Micro Four Thirds, inside the box was an extension for a standard Nikon mount, which is too big for M4/3.
1601553
If the lens is marked 12-50 is equivalant 35mm focal length will in fact already be 24mm-100mm. It will do digital zoom but remember any software zoom will not result in any increase in detail. It only crops and enlarges.
1937696
Hi All, very interested in these postings but still can't get this lens to work with my D70 in M or AF. I too get fEE message displayed and shutter won'r fire, even after locking off at f22 etc. Starting to wonder if its a camera setting or am I missing something?
1937691
Hi. I purchased the same lens 2 days ago and yes, I am a novice using a D300. I have the same 'err' reading but when i switch and locked to f/22 i realised that the camera body electronically controls the aperture setting - which you can obviously set in 'A' mode. I assumed that the manual a f adjustment ring on the lens then was only for cameras that do no have electronically controlled A settings via the body.
236866
I don't own D200 but D200 appears to be a DX camera, which has a crop sensor, not full frame. Hence the focal length will be equivalent of 27mm-52.5mm. The strongpoint of this lens is that it's very wide and sharp, but with a DX camera obviously it won't be as wide as you want it to be, compared to 12-24mm lens you mentioned, which is for DX camera unlike this 18-35mm lens. Do you find the focal length 27-52.5mm useful to you?
565961
I just figured out how to do this today with my new lens. Since Sigma did not put the autofocus/manual focus switch on the lens itself, you need to go into the information menu (the i menu on the lower left side of the camera) and set your focus mode to manual (change the AF-A on the right side to MF). Once you override the autofocus on the camera, use the outer ring on the lens to focus. Hope this helps! Took me a little bit of research to find this. :)
482928
You can not change the lenses on this camera, however you can add lens converters to the existing lens to get different focal lengths.
1186462
My answer to this is to set the lens at F8 either with Aperture Priority or Manual Mode. Having the lens wide open at F 4.5 just doesn't give the best results IMO. The results of learning this lesson is in the early results of seeing soft images at the edges of the pictures and loss of sharpness. F8 makes all the difference with this lens at least for me.
1679834
http://www.flickr.com/groups/d40slr/discuss/72157602509321717/?search=sigma+vs.+nikon i know it's been a while but that may give some insight. i have the sigma version and it's great value for the price paid.
95022
jESSICA, I got an article from Nikonians that affirm it performs auto focus with D--3100/5100/5000/3000/60 and 40. Don't take my word on this and research a bit more, maybe call Sigma and ask them directly. I hope I helped you in some way.
1875333
This is strictly for macro. Focusing on anything that isn't at the closest focal point is impossible. It is also recommended that you use a lens with a shorter zoom level. This is basically incompatible with my 250mm. I can only imagine how much worse it is with a 400mm.
826199
The camera will default to DX (assuming it recognizes that it is a DX format lens given that it is third-party). You can always over-ride the setting though. I shoot a 11-16 all the time and when I put it on my film camera (N80), I was able to shoot at around the 15mm focal length. My friend mentioned that he had the same experience with a D700. I think it is still a better deal than the effective focal length of 16.5 with a DX format camera. It is better than the 16-28 FX lens (because you cannot put a Circular polarizer on) and the 17-35 f4 tokina. Hope that helps.
1380310
The apertue setting is set to f22 on the lens and then you can change the aperture via the camera. That is normal for all D lenses.