Sigma 300-600 F4
p.5 #1Sigma 300-600 F4
SaberArtori wrote:
It does work, it isn't perfect but it certainly does a great job when it hits ...How often does it hit though? I recently got the 300-600 and find myself still wanting reach at times but not sure if the image degradation of the 2x viltrox tc is worth it if the iq also take a big hit.
I notice very little degradation in sharpness with it, it if very impressive to me. Biggest issue is atmospheric distortion at those long focal lengths, but if subject is reasonably close it is very good.
jeffryscott wrote
Rialto wrote
Woah, I must have been living under a rock: the Viltrox 2x works with this lens? I now have renewed interest in it.I notice very little degradation in sharpness with it, it if very impressive to me. Biggest issue is atmospheric distortion at those long focal lengths, but if subject is reasonably close it is very good.
May 22, 2026 at 05:32 AM
p.5 #2Sigma 300-600 F4
jeffryscott wrote:
It does work, it isn't perfect but it certainly does a great job when it hits ...How often does it hit though? I recently got the 300-600 and find myself still wanting reach at times but not sure if the image degradation of the 2x viltrox tc is worth it if the iq also take a big hit.I notice very little degradation in sharpness with it, it if very impressive to me. Biggest issue is atmospheric distortion at those long focal lengths, but if subject is reasonably close it is very good.
Noted, does the OS still work well with the tc attached? I read alot of reviews saying since the info is not relayed correctly, for some reason the OS doesn't work as well.
SaberArtori wrote
jeffryscott wrote
Rialto wrote
Woah, I must have been living under a rock: the Viltrox 2x works with this lens? I now have renewed interest in it.Noted, does the OS still work well with the tc attached? I read alot of reviews saying since the info is not relayed correctly, for some reason the OS doesn't work as well.
May 23, 2026 at 10:56 PM
p.5 #3Sigma 300-600 F4
SaberArtori wrote:
It does work, it isn't perfect but it certainly does a great job when it hits ...How often does it hit though? I recently got the 300-600 and find myself still wanting reach at times but not sure if the image degradation of the 2x viltrox tc is worth it if the iq also take a big hit.I notice very little degradation in sharpness with it, it if very impressive to me. Biggest issue is atmospheric distortion at those long focal lengths, but if subject is reasonably close it is very good.Noted, does the OS still work well with the tc attached? I read alot of reviews saying since the info is not relayed correctly, for some reason the OS doesn't work as well.
I have not noted any problems with that, but I also 99% shoot that lens from a monopod or tripod (as I do all my long glass).
jeffryscott wrote
SaberArtori wrote
jeffryscott wrote
Rialto wrote
Woah, I must have been living under a rock: the Viltrox 2x works with this lens? I now have renewed interest in it.I have not noted any problems with that, but I also 99% shoot that lens from a monopod or tripod (as I do all my long glass).
May 24, 2026 at 05:29 AM
p.5 #4Sigma 300-600 F4
jeffryscott wrote:
It does work, it isn't perfect but it certainly does a great job when it hits ...How often does it hit though? I recently got the 300-600 and find myself still wanting reach at times but not sure if the image degradation of the 2x viltrox tc is worth it if the iq also take a big hit.I notice very little degradation in sharpness with it, it if very impressive to me. Biggest issue is atmospheric distortion at those long focal lengths, but if subject is reasonably close it is very good.Noted, does the OS still work well with the tc attached? I read alot of reviews saying since the info is not relayed correctly, for some reason the OS doesn't work as well.I have not noted any problems with that, but I also 99% shoot that lens from a monopod or tripod (as I do all my long glass).
Noted, I will get the tc then. Excited to have a 600-1200 f8 lens
.
SaberArtori wrote
jeffryscott wrote
SaberArtori wrote
jeffryscott wrote
Rialto wrote
Woah, I must have been living under a rock: the Viltrox 2x works with this lens? I now have renewed interest in it.Noted, I will get the tc then. Excited to have a 600-1200 f8 lens
.May 24, 2026 at 04:25 PM
p.5 #5Sigma 300-600 F4
Cooper's hawk with 300-600 using Viltrox 2x.
ILCE-1 300-600mm F4 DG OS | Sports 025 lens 462mm f/4.0 1/3200s 6400 ISO +0.3 EV
May 29, 2026 at 06:24 AM
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p.5 #6Sigma 300-600 F4
Some Cooper's hawks and other recent images, 300-600 and Sony A1.
Cooper's hawk adult male chasing after a bat, pre-sunrise.
Cooper's hawk adult male chasing after a bat, pre-sunrise.
ILCE-1 300-600mm F4 DG OS | Sports 025 lens 600mm f/4.0 1/1000s 800 ISO 0.0 EV
ILCE-1 300-600mm F4 DG OS | Sports 025 lens 512mm f/4.0 1/2000s 3200 ISO +0.7 EV
ILCE-1 300-600mm F4 DG OS | Sports 025 lens 393mm f/4.0 1/2000s 400 ISO +0.3 EV
ILCE-1 300-600mm F4 DG OS | Sports 025 lens 301mm f/4.0 1/2000s 400 ISO +0.3 EV
ILCE-1 300-600mm F4 DG OS | Sports 025 lens 600mm f/4.0 1/2000s 3200 ISO 0.0 EV
ILCE-1 300-600mm F4 DG OS | Sports 025 lens 600mm f/4.0 1/4000s 8000 ISO -0.7 EV
ILCE-1 300-600mm F4 DG OS | Sports 025 lens 600mm f/4.0 1/4000s 2500 ISO -0.3 EV
ILCE-1 300-600mm F4 DG OS | Sports 025 lens 600mm f/4.0 1/4000s 1250 ISO -1.3 EV
ILCE-1 300-600mm F4 DG OS | Sports 025 lens 600mm f/4.0 1/2000s 800 ISO -2.0 EV
ILCE-1 300-600mm F4 DG OS | Sports 025 lens 383mm f/4.0 1/1600s 5000 ISO 0.0 EV
ILCE-1 300-600mm F4 DG OS | Sports 025 lens 600mm f/4.0 1/1250s 500 ISO +0.7 EV
ILCE-1 300-600mm F4 DG OS | Sports 025 lens 600mm f/4.0 1/1000s 3200 ISO 0.0 EV
Jul 05, 2026 at 07:56 PM
p.5 #7Sigma 300-600 F4
jeffryscott wrote:
Some Cooper's hawks and other recent images, 300-600 and Sony A1.
Excellent images Jeffry
Some Cooper's hawks and other recent images, 300-600 and Sony A1.
Excellent images Jeffry
Jul 05, 2026 at 10:25 PM
p.5 #8Sigma 300-600 F4
shac wrote:
Excellent images Jeffry
thanks so much!
jeffryscott wrote
Some Cooper's hawks and other recent images, 300-600 and Sony A1.thanks so much!
Jul 06, 2026 at 05:21 AM
p.5 #9Sigma 300-600 F4
Some from the last month with the Sigma 300-600 and Sony A7rVI. Still very happy with this lens overall, great alternative to the Sony 600 from a price standpoint. With a few exceptions, the AF is more than adequate for fast moving subjects and overall I've not been hindered by the 15fps limit. The first four to five images in this set were also shot with the Viltrox 2x, which overall has impressed me.
All images from my local hotspot in Tucson, AZ (well, actually Marana, AZ) at El Rio Preserve.
All images from my local hotspot in Tucson, AZ (well, actually Marana, AZ) at El Rio Preserve.
Oct 09, 2026 at 05:31 AM