Sat 13-Nov-10 04:27 PM | edited Sat 13-Nov-10 04:38 PM by willif
yes autofocus in live view works for me.
What do you mean with "autofocus" button? Switch live view on, choose a focus mode, start with single AF, choose a AF-area mode, start with normal. Then choose the focus point and then press the shutter-release button halfway to focus and the red rectangle will turn green when it is focused (see also manual page 50 to 52). This is not working on your camera? What lense are you using? I read that there are problems with third party lenses.
Back at the end of 2005, after the D200 camera was released, people found that several Sigma HSM lenses would not autofocus when the camera's AF-ON button was pressed. Sigma issued a service advisory about the issue, and owners were able to send their lenses to Sigma for re-chipping. Nikon later included a fix in a D200 firmware update.
I would anticipate that, if this proves to be a similar problem, both companies will respond to it in the fullness of time.
>Before doing anything I'd install the new firmware that Nikon >has released for the D7000. Perhaps they have fixed the >issue.
Sigma is referring to the firmware on the chip in their lenses. Third party manufactures need to reverse engineer the algorithms for focusing for different manufacturer bodies. As such a new body can become incompatible with their firmware.
As such I cannot see how upgrading the Camera firmware would have an impact because Nikon is not concerned with Sigma lens compatibility, only Nikkor lenses.
If such an issue arises, the lens needs to be returned to Sigma for an upgrade (unless there is a way a user can access and upgrade the lens firmware themselves).
>As such I cannot see how upgrading the Camera firmware would >have an impact because Nikon is not concerned with Sigma lens >compatibility, only Nikkor lenses.
There is a precedent...
I think it was the D300 that, when released, would not work using the AF-ON button with certain Sigma lenses. Sigma offered a upgrade for the affected lenses - as they usually do - but Nikon also included a fix in the next camera firmware update
I have to correct myself. On closer observation, my 18-200mm lens doesn't focus properly in Live View. It will shift focus, but in a small increment stepping toward infinity with each 1/2 press of the shutter release (I don't use "Focus On" or "AF lock"). It does otherwise work properly, in viewfinder mode. I had installed the D7000 1.02 firmware update between my two posts. I'm contacting Sigma to see about an upgrade. This does move me more toward paying more for Nikon when I am next comparing lenses.
My experience has been that Sigma has been very good about upgrading their lenses to maintain compatibility. I've sent back both an 800mm and a 50-500mm (a number of years ago) for upgrades that Sigma did willingly without charge. It cost me only the out-going shipping costs. I don't know if there is any cost associated with the upgrades for live view function (the fix varies from lens to lens), but concern about future compatibility wouldn't deter me from purchasing another Sigma lens.
>My experience has been that Sigma has been very good about >upgrading their lenses to maintain compatibility.
This is very generous of Sigma. To upgrade their product for interoperability with some future model of camera body they had not seen at lens design time is pretty cool. The one-way shipping costs to the consumer are quite reasonable I'd say. This is good to know as I have a Sigma 8-16mm wide angle zoom. Cheers, Peter
Update: I've emailed Sigma in the USA twice so far, 6/13 & 6/20 referencing this thread, and a Desiree Gaige has said her service manager is "checking with Japan on the live view functions". If there is an answer, I'll let you all know.
First they asked me to send in both my lens and camera body, suspecting a malfunction in either. Once they understood that many D7000 owners experience this problem, they offered to look at the lens alone. I doubt I'll bother. The 18-200mm is my walk-around lens, and since LiveView is most useful on a tripod, I might never need it with this lens (not that I couldn't MF in that case anyway).
FWIW, I tried most of my other non-Nikon AF lenses. These included 3 1990s Tamron zooms (f2.7-3.5 20-40mm, and f2.8 35-105mm and 28-105mm lenses) and an old Sigma 50mm f2.8 macro lens. These all focus using the body's motor -- and do so just fine in LiveView. I'm left wondering if this problem may especially have to do with the Sigma HSM in-lens motor, which the 18-200mm has. The lens's software would have to read the camera's instructions properly, which might be a different variety with contrast detection. This would be irrelevant if the camera is actually controlling the focus directly with its own motor.
I just picked up my Sigma 10-20 4-5.6 from the repair shop and it works great now. I'm fortunate enough to work about 5 miles from the Sigma repair center so I just dropped it off at lunch time. The firmware update was all that was needed. It took less than a week and was covered under warranty.
>Does anyone here know if the Sigma 17-50 suffers from this >problem? I'm considering buying one. TIA. > >Rich
I have the Sigma 17-50mm f/2.8 EX HSM, purchased this year (2011) and it will focus fine in LiveView mode. I have never used Video mode. I have a great Sony HD video camera and don't use video mode on the D7000.
Sun 04-Sep-11 07:29 PM | edited Sun 04-Sep-11 07:30 PM by fuzznut
>I have the Sigma 17-50mm f/2.8 EX HSM, purchased this year (2011) and it will focus fine in LiveView mode. I have never used Video mode. I have a great Sony HD video camera and don't use video mode on the D7000.
Have a Sigma 28-70 2.8 IF that also has no problem with focusing in live view and video mode. But the problem of using auto focus during video is that, when refocusing, it always goes *through* focus and then backs up into proper focus. This would make for an annoying video to watch. And, while the HSM is quiet, it can still be heard in the audio. I'm wondering if all lenses go through focus in LV due to the contrast detection method of focusing.
My Sigma 70mm EX DG macro lens would not focus in live view with the D7000. Sigma UK have offered to rechip/modify it (their words) at a charge of £5 so long as I produce proof that I purchased the lens new, otherwise the charge would have been £37.99. This seems very reasonable to me. The lens is about 4 years old.
Two weeks ago I had to send my Sigma 50mm f1.4 EX DG HSM to the Sigma service center to have it updated to work with my D7000 in liveview mode. This was a "new" lens but it would just hunt when it attempted to autofocus. It also had a bit of front focus problem in normal mode when the aperture was wide open. The only cost was my shipping to the center (which is the most I should have had to pay to have a new lens work properly). It was back in three days and seems to be working correctly. There was a note that it was "cleaned and recalibrated". So far I am very pleased with it.