New release Sigma 300-600mm f/4 Full frame
p.8 #1New release Sigma 300-600mm f/4 Full frame
LiveShots wrote:
This is very interesting, several reviewers mentioned the inability to zoom and focus at the same time, if possible can you do the same test on the Sony body ?
If it does not work on the Sony then this may be another example of Sony handicapping 3rd party lenses, and does open the question of whether other aspects of focusing are being limited.
I was surprised by this as well. I was initially concerned the lens is not parfocal, as some reviews mentioned that you have to reacquire autofocus after changing the focal length. However, that hasn’t been the case with the Nikon Z9—I’ve been able to maintain focus while zooming in and out without any issues. I haven’t tested this on a Sony body yet, but I plan to do so later this week.
Edited on May 22, 2025 at 05:35 PM · View previous versions
NopP wrote
4. Zoom & Focus: Contrary to some reports, the lens allows continuous focus while zooming, which is excellent for tracking action.If it does not work on the Sony then this may be another example of Sony handicapping 3rd party lenses, and does open the question of whether other aspects of focusing are being limited.
I was surprised by this as well. I was initially concerned the lens is not parfocal, as some reviews mentioned that you have to reacquire autofocus after changing the focal length. However, that hasn’t been the case with the Nikon Z9—I’ve been able to maintain focus while zooming in and out without any issues. I haven’t tested this on a Sony body yet, but I plan to do so later this week.
Edited on May 22, 2025 at 05:35 PM · View previous versions
May 22, 2025 at 02:30 PM
p.8 #2New release Sigma 300-600mm f/4 Full frame
tsdevine wrote:
This is very interesting, several reviewers mentioned the inability to zoom and focus at the same time, if possible can you do the same test on the Sony body ?
If it does not work on the Sony then this may be another example of Sony handicapping 3rd party lenses, and does open the question of whether other aspects of focusing are being limited.I think Sony is going to have to re-evaluate those limits at some point. I guess most people won't know, but if people hear that an E mount lens works better on Nikon with an adapter, that might be a bit embarrassing.
Funny you mentioned this! When I mounted the lens onto the Sony A1 II, I couldn’t get it to focus at all. We double-checked all the settings, thinking we’d missed something—only to realize I had forgotten to remove the Sony 1.4X teleconverter when switching from Nikon to Sony.
That said, I was really surprised by how sharp the lens performs with the 1.4X attached. However, there is some noticeable vignetting, even when stopping down the aperture.
On the Nikon, it doesn’t report the correct focal length or f-stop when using the teleconverter. It should read 840mm at f/5.6, but it still shows 600mm at f/4. Just something to keep in mind!
LiveShots wrote
NopP wrote
4. Zoom & Focus: Contrary to some reports, the lens allows continuous focus while zooming, which is excellent for tracking action.If it does not work on the Sony then this may be another example of Sony handicapping 3rd party lenses, and does open the question of whether other aspects of focusing are being limited.
Funny you mentioned this! When I mounted the lens onto the Sony A1 II, I couldn’t get it to focus at all. We double-checked all the settings, thinking we’d missed something—only to realize I had forgotten to remove the Sony 1.4X teleconverter when switching from Nikon to Sony.
That said, I was really surprised by how sharp the lens performs with the 1.4X attached. However, there is some noticeable vignetting, even when stopping down the aperture.
On the Nikon, it doesn’t report the correct focal length or f-stop when using the teleconverter. It should read 840mm at f/5.6, but it still shows 600mm at f/4. Just something to keep in mind!
May 22, 2025 at 02:34 PM
p.8 #3New release Sigma 300-600mm f/4 Full frame
NopP wrote:
I was surprised by this as well. I was initially concerned the lens is not parfocal, as some reviews mentioned that you have to reacquire autofocus after changing the focal length. However, that hasn’t been the case with the Nikon Z9—I’ve been able to maintain focus while zooming in and out without any issues. I haven’t tested this on a Sony body yet, but I plan to do so later this week.
i just a video on my FB wall. Af works when zoom in/out. Shooting with A1.
I was surprised by this as well. I was initially concerned the lens is not parfocal, as some reviews mentioned that you have to reacquire autofocus after changing the focal length. However, that hasn’t been the case with the Nikon Z9—I’ve been able to maintain focus while zooming in and out without any issues. I haven’t tested this on a Sony body yet, but I plan to do so later this week.
i just a video on my FB wall. Af works when zoom in/out. Shooting with A1.
May 22, 2025 at 10:31 PM
p.8 #4New release Sigma 300-600mm f/4 Full frame
That would be big news if it works consistently for everyone’s A1s!
May 23, 2025 at 06:34 PM
p.8 #5New release Sigma 300-600mm f/4 Full frame
Alex Phan wrote:
i just a video on my FB wall. Af works when zoom in/out. Shooting with A1.
That's strange, it does not continuously focus when I use zoom on my a1 ii.
NopP wrote
I was surprised by this as well. I was initially concerned the lens is not parfocal, as some reviews mentioned that you have to reacquire autofocus after changing the focal length. However, that hasn’t been the case with the Nikon Z9—I’ve been able to maintain focus while zooming in and out without any issues. I haven’t tested this on a Sony body yet, but I plan to do so later this week.That's strange, it does not continuously focus when I use zoom on my a1 ii.
May 23, 2025 at 08:58 PM
p.8 #6New release Sigma 300-600mm f/4 Full frame
Alex Phan wrote:
i just a video on my FB wall. Af works when zoom in/out. Shooting with A1.
Can you use a TC on it?
NopP wrote
I was surprised by this as well. I was initially concerned the lens is not parfocal, as some reviews mentioned that you have to reacquire autofocus after changing the focal length. However, that hasn’t been the case with the Nikon Z9—I’ve been able to maintain focus while zooming in and out without any issues. I haven’t tested this on a Sony body yet, but I plan to do so later this week.Can you use a TC on it?
May 24, 2025 at 04:33 PM
p.8 #7New release Sigma 300-600mm f/4 Full frame
freaklikeme wrote:
]
Can you use a TC on it?
Not with Sony camera.
]
Can you use a TC on it?
Not with Sony camera.
May 24, 2025 at 06:44 PM
p.8 #8New release Sigma 300-600mm f/4 Full frame
Alex Phan wrote:
Can you use a TC on it?Not with Sony camera.
I thought maybe you have a magic A1. What firmware are you running?
freaklikeme wrote
]Can you use a TC on it?
I thought maybe you have a magic A1. What firmware are you running?
May 24, 2025 at 06:57 PM
p.8 #9New release Sigma 300-600mm f/4 Full frame
So…does continuous AF work while zooming or not?
There seems to be contradictory experiences
Sorry Alex. I’m not on facebook. So if you posted a video clip there, I can’t see it
There seems to be contradictory experiences
Sorry Alex. I’m not on facebook. So if you posted a video clip there, I can’t see it
May 24, 2025 at 06:58 PM
p.8 #10New release Sigma 300-600mm f/4 Full frame
robert614 wrote:
So…does continuous AF work while zooming or not?
There seems to be contradictory experiences
Sorry Alex. I’m not on facebook. So if you posted a video clip there, I can’t see it
Not for me, I am on a1 ii with latest firmware. It seems to be the case for all the reviews I've watched as well, ex. Jared Polin.
So…does continuous AF work while zooming or not?
There seems to be contradictory experiences
Sorry Alex. I’m not on facebook. So if you posted a video clip there, I can’t see it
Not for me, I am on a1 ii with latest firmware. It seems to be the case for all the reviews I've watched as well, ex. Jared Polin.
May 24, 2025 at 08:29 PM
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p.8 #11New release Sigma 300-600mm f/4 Full frame
ASC_1900 wrote:
There seems to be contradictory experiences
Sorry Alex. I’m not on facebook. So if you posted a video clip there, I can’t see itNot for me, I am on a1 ii with latest firmware. It seems to be the case for all the reviews I've watched as well, ex. Jared Polin.
That was my understanding as well. But Alex seems to be contradicting everyone else’s experience
I understand it working adapted to a Nikon. As the artificial limitations Sony implements wouldn’t affect a Nikon body. But I thought that continuous AF while zooming wasn’t possible on a Sony body
robert614 wrote
So…does continuous AF work while zooming or not?There seems to be contradictory experiences
Sorry Alex. I’m not on facebook. So if you posted a video clip there, I can’t see it
That was my understanding as well. But Alex seems to be contradicting everyone else’s experience
I understand it working adapted to a Nikon. As the artificial limitations Sony implements wouldn’t affect a Nikon body. But I thought that continuous AF while zooming wasn’t possible on a Sony body
May 24, 2025 at 08:52 PM
p.8 #12New release Sigma 300-600mm f/4 Full frame
My first attempt at comparing the 300-600mm with a Sony 400mm, I find the 300-600mm to be a bit sharper at its midrange. I do not think it is as sharp at 600mm. Here are 2 shots, one Sony 400mm on an A7R5 and the other 300-600 on a different A7R5. I tried to set the zoom at 400mm but it ended up being 453mm. Both shots are dramatically cropped.
SCPR5B08501 1 by Sony 400mm, on Flickr
SCPR5B01324 2 by Sigma300-600@453, on Flickr
SCPR5B08501 1 by Sony 400mm, on FlickrSCPR5B01324 2 by Sigma300-600@453, on FlickrMay 25, 2025 at 06:08 AM
p.8 #13New release Sigma 300-600mm f/4 Full frame
With the Z9 11 rumours sounding a better body than the A1 11, maybe that's a good companion with this lens when it arrives and rumours are correct.
May 25, 2025 at 06:54 AM
p.8 #14New release Sigma 300-600mm f/4 Full frame
robert614 wrote:
Sorry Alex. I’m not on facebook. So if you posted a video clip there, I can’t see it
I'm not on facebook either and was able to view his video. It clearly shows focusing while zooming….
Sorry Alex. I’m not on facebook. So if you posted a video clip there, I can’t see it
I'm not on facebook either and was able to view his video. It clearly shows focusing while zooming….
May 25, 2025 at 02:17 PM
p.8 #15New release Sigma 300-600mm f/4 Full frame
LiveShots wrote:
I'm not on facebook either and was able to view his video. It clearly shows focusing while zooming….
Great to hear!
Do you happen to have a link?
robert614 wrote
Sorry Alex. I’m not on facebook. So if you posted a video clip there, I can’t see itGreat to hear!
Do you happen to have a link?
May 25, 2025 at 03:26 PM
p.8 #16New release Sigma 300-600mm f/4 Full frame
robert614 wrote:
I'm not on facebook either and was able to view his video. It clearly shows focusing while zooming….Great to hear!
Do you happen to have a link?
I was also looking for it:
https://www.facebook.com/watch/?v=1712808606787056
LiveShots wrote
robert614 wrote
Sorry Alex. I’m not on facebook. So if you posted a video clip there, I can’t see itDo you happen to have a link?
I was also looking for it:
https://www.facebook.com/watch/?v=1712808606787056
May 25, 2025 at 05:36 PM
p.8 #17New release Sigma 300-600mm f/4 Full frame
j4nu wrote:
I'm not on facebook either and was able to view his video. It clearly shows focusing while zooming….Great to hear!
Do you happen to have a link?I was also looking for it:
https://www.facebook.com/watch/?v=1712808606787056
Thx!
I’ll have to take your guys word for it. It won’t let me see the clip unless I create an account
Good to know it works!
robert614 wrote
LiveShots wrote
robert614 wrote
Sorry Alex. I’m not on facebook. So if you posted a video clip there, I can’t see itDo you happen to have a link?
https://www.facebook.com/watch/?v=1712808606787056
Thx!
I’ll have to take your guys word for it. It won’t let me see the clip unless I create an account
Good to know it works!
May 25, 2025 at 07:09 PM
p.8 #18New release Sigma 300-600mm f/4 Full frame
Just click the ‘X’ in the top right corner of the pop-up, the video should play.
May 25, 2025 at 08:52 PM
p.8 #19New release Sigma 300-600mm f/4 Full frame
ASC_1900 wrote:
There seems to be contradictory experiences
Sorry Alex. I’m not on facebook. So if you posted a video clip there, I can’t see itNot for me, I am on a1 ii with latest firmware. It seems to be the case for all the reviews I've watched as well, ex. Jared Polin.
Interesting how Alex got his lens to work on Sony. With my Nikon Z9, the autofocus works normal while zooming.
robert614 wrote
So…does continuous AF work while zooming or not?There seems to be contradictory experiences
Sorry Alex. I’m not on facebook. So if you posted a video clip there, I can’t see it
Interesting how Alex got his lens to work on Sony. With my Nikon Z9, the autofocus works normal while zooming.
May 26, 2025 at 12:37 PM
p.8 #20New release Sigma 300-600mm f/4 Full frame
Does not auto focus on my A7R5 while zooming with video. Latest firmware on the A7R5.
May 26, 2025 at 03:08 PM