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New Lenses?

  
 
duncangr
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p.8 #1 · New Lenses?


nmerc_photos wrote:
I expect it will be far more than adequate.

I think the IQ difference between the new 600 6.3 + 1.4x and the 600GM + 1.4x will be negligible all things considered, if the 300GM is anything to base expectations on.

I don't think the 600 6.3 will be better than the 300GM + 2x, and I still think the 600 6.3 + 1.4x will be great.


You've got to be kidding - 840 f/9 vs 840 f/5.6 .

The difference is pretty STARK when the light is dim !! f/9 is basically unusable except for significantly downsampled images for social media.

Forget about any BIF in poor light with f/9.

My 200-600 with 1.4TC is pretty impressive in decent light - so any 600 f/6.3 has to be pretty exceptional to improve significantly on that.

Here is an example from the 200-600 + 1.4TC - if it can beat that by how much and is it worth the $$$.

If it can match that at half the weight or even less than half the weight then it will be worth its double its weight in gold

Credit to Jan Wegener who took this picture when he borrowed my gear to test it.








Sep 09, 2026 at 09:35 PM
ps09
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p.8 #2 · New Lenses?


I think a lot of people comment on threads without having used the gear they are commenting on. It serves no purpose.

The 2-6 and a9 were the reasons I switched to Sony after 30+ years with Nikon. After shooting +/- 250k frames of eagles, owls, bears and loons (in action and static) with the a9/a1 and 2-6, I got the 300 2.8. I already had the 600f4 and both tcs. After my first day in the kayak with the 300 and 2x I was astonished at the difference in af accuracy, af acquisition speed and most of all the clarity and "pop" the 300/2x combo created vs the 2-6. I still feel the 2-6 is a marvel for what it is, but the 300gm is the sharpest tele I have shot with in 50 years, I also have the 70-200gmii & 600gm, which are incredible, but the 300 is a razor.

As others have stated, the 300 starts at such a high bar that the degradation affect that tcs have on the 300 is far less obvious than other lenses, I think the 300 takes tcs better than the 600gm and 400gm. I still own the 600gm and I rented the 400gm 3x (not the same copy-I take note of sn when I rent), so I feel safe commenting on how it takes tcs. It's the worst of the 3.

I think the easiest way to come to a conclusion is by looking at your own images, I use a Mac studio and 5k display for my critical editing. Prior to that, I used an iMac. Same display, retina 5k. When I had both the 2-6 and 300, it was immediately obvious which frames were shot with the 300+2x vs 2-6. To me, that is the basis for judging a lens, Shoot them side by side, same day, same time, same subject, same settings. Then, take a look at the images, I not only had a much higher hit rate with the 300/2x but the images required little to no post processing. I always had to tinker with the 2-6 by adding extra contrast or creative sharpening. With the 2-6, you had to work to get out the details, whereas the 300 slaps you in the face with detail. The 300 also provides that dreamy bokeh that is always rougher with a zoom.

If 600 is all that you need and you own a 2-6, I recommend renting a 300 and 2x for a few days. I, and many others, have a 600gm that "sits" unless more than 600mm is needed. Yes, the 600gm is slightly better and a full stop faster, BUT, with the 300 combo I can leave a tripod at home and the mobility of the little lens enables me to be faster on the draw and capture moments I would miss with the heavier, larger lens. I can handhold the 300 and 600, but I can keep the 300 on an erratic subject better than the 600.

As sensors continue to improve and upscaling software improves, we may find that 600 is all we'll ever need since conditions must be absolutely perfect for 800mm and more due to atmospheric distortion/heat waves. There's always a tradeoff/compensation. From my experience, the only downside to the 300gm is it can only get me to 600. I hope the new lens will be comparable to the 300 with 2x mounted, but that's a tall order. If it is, I'll rent it and slap the 1.4 on it and see how things look. I'd love a compact 840mm lens even at f9. I had the 4-8. It is not compact at roughly 1# less than the 600gm. It's sharp, but it was so close to the weight and handling of the 600 that it offered me little since I was at 800 all the time anyway and wasn't taking advantage of the zoom.

Let's hope the rumors are real and the new lenses are awesome!



Sep 10, 2026 at 04:10 AM
arbitrage
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p.8 #3 · New Lenses?


Latest from SAR is the 600 has 2.5 MFD....contrast that to the 600PF's 4m MFD
That is promising.
The 300GM has 2m MFD so the 300/2x may still have more MM.



Sep 10, 2026 at 07:12 AM
arbitrage
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p.8 #4 · New Lenses?




nmerc_photos wrote:
I expect it will be far more than adequate.

I think the IQ difference between the new 600 6.3 + 1.4x and the 600GM + 1.4x will be negligible all things considered, if the 300GM is anything to base expectations on.

I don't think the 600 6.3 will be better than the 300GM + 2x, and I still think the 600 6.3 + 1.4x will be great.


I don’t know about the IQ between the 600/6.3 and 300/2x (I think they will be close and I’d bet a slight edge to the 600). But if the 600 has 4 linear motors I bet the AF will be better than the 300/2x because that is where I feel the 300/2x suffers the most when comparing it to 300/1.4x or 600GM.



Sep 10, 2026 at 07:21 AM
Douglas L
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p.8 #5 · New Lenses?


arbitrage wrote:
Latest from SAR is the 600 has 2.5 MFD....contrast that to the 600PF's 4m MFD
That is promising.
The 300GM has 2m MFD so the 300/2x may still have more MM.


But the 300 GM's MFD is 2 meters . In all seriousness, I have zero interest in the 400. The 600 will have to be visibly sharper than the 300+2X TC for me to make the switch. The 300 GM is light/compact enough for me already, not that I don't welcome an even lighter/smaller lens. To get to 800mm, I have the 400-800, crazy sharp lens but heavy. For what I use the 400-800 for, it's more versatile than a prime anyway, and at f8.



Sep 10, 2026 at 07:23 AM
arbitrage
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p.8 #6 · New Lenses?


robert614 wrote:
Interesting. What is that black stripe above the “400mm” where the silver metal plate is usually on superteles. Just gaffer tape covering the plate?

More interested in the 600mm, so hopefully we’ll get a pic soon


That was my first thought.... Whomever had this out testing/reviewing covered the name plate to make it a little less obvious it was a new lens. Although they didn't cover the "400".



Sep 10, 2026 at 08:20 AM
arbitrage
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p.8 #7 · New Lenses?


Douglas L wrote:
But the 300 GM's MFD is 2 meters . In all seriousness, I have zero interest in the 400. The 600 will have to be visibly sharper than the 300+2X TC for me to make the switch. The 300 GM is light/compact enough for me already, not that I don't welcome an even lighter/smaller lens. To get to 800mm, I have the 400-800, crazy sharp lens but heavy. For what I use the 400-800 for, it's more versatile than a prime anyway, and at f8.


I don't have any interest in the 400 either.
I will seriously consider the 600. It won't be a replacement for the 300GM. The 300GM will remain and be used mostly at 300/420. And some days I'd probably only take the 300GM out and still use it at 600.
But if I know it is going to be a 600+ with good light type of day I'd prefer the lighter (and hopefully better AF) of the 600/6.3 with the option to use the 1.4TC to go out to 840/9.
I think most likely I'd be selling the 100-400/4.5 if I sold anything after buying a 600/6.3.



Sep 10, 2026 at 08:22 AM
nmerc_photos
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p.8 #8 · New Lenses?


arbitrage wrote:
I don't have any interest in the 400 either.
I will seriously consider the 600. It won't be a replacement for the 300GM. The 300GM will remain and be used mostly at 300/420. And some days I'd probably only take the 300GM out and still use it at 600.
But if I know it is going to be a 600+ with good light type of day I'd prefer the lighter (and hopefully better AF) of the 600/6.3 with the option to use the 1.4TC to go out to 840/9.
I think most likely I'd be selling the 100-400/4.5 if I sold anything after
...Show more →

Have you put any thought into the 100-400 f4.5 + 600 6.3 combo instead of the 300 + 600 combo?

I think that's where I'm at.

300GM mainly retains its value at 300mm f2.8, because once you add the 1.4x it's on more equal ground with the 100-400. 400 f4.5 vs 420 f4.

I personally don't have much need for a zoom, but when I do it need, it's like "maaaan I wish I had it"



Sep 10, 2026 at 08:24 AM
ps09
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p.8 #9 · New Lenses?


Just curious, how does the new 100-400 with 1.4 compare to the 300 w 2x?


Sep 10, 2026 at 10:31 AM
arbitrage
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p.8 #10 · New Lenses?


nmerc_photos wrote:
Have you put any thought into the 100-400 f4.5 + 600 6.3 combo instead of the 300 + 600 combo?

I think that's where I'm at.

300GM mainly retains its value at 300mm f2.8, because once you add the 1.4x it's on more equal ground with the 100-400. 400 f4.5 vs 420 f4.

I personally don't have much need for a zoom, but when I do it need, it's like "maaaan I wish I had it"


I like the 300 better than the 100-400. I have some subjects where 300/2.8 is perfect so I don't want to give that up. I maybe could substitute a 70-200/2.8 for those subjects but I think 300mm is still best.

I've been shifting my use back to the 300 now that the honeymoon period for the new 100-400 is over. Also my main kayak season is coming to an end as the Osprey leave so I'll be back to using the 300GM a lot more now.

For me it will be 300GM and 600/6.3 if I decide to buy the new lens. 600/4GM will remain in the stable for now as I do have my use cases for it as we head into more dreary winter weather in the PNW.

I'm still with the mindset that if I was forced to only own one lens it would be the 300GM with TCs.



Sep 10, 2026 at 10:33 AM
 


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Andyuk109
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p.8 #11 · New Lenses?


This is where I am at currently

Pair the 600/6.3 with the 100-400 - both of which would fit nicely into a a normal camera backpack

See if Viltrox release a 1.4Tc - if so keep the sigma 300-600, if not, more than likely sell it

nmerc_photos wrote:
Have you put any thought into the 100-400 f4.5 + 600 6.3 combo instead of the 300 + 600 combo?

I think that's where I'm at.

300GM mainly retains its value at 300mm f2.8, because once you add the 1.4x it's on more equal ground with the 100-400. 400 f4.5 vs 420 f4.

I personally don't have much need for a zoom, but when I do it need, it's like "maaaan I wish I had it"




Sep 10, 2026 at 10:36 AM
seaSharp
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p.8 #12 · New Lenses?


ps09 wrote:
I think a lot of people comment on threads without having used the gear they are commenting on. It serves no purpose.

The 2-6 and a9 were the reasons I switched to Sony after 30+ years with Nikon. After shooting +/- 250k frames of eagles, owls, bears and loons (in action and static) with the a9/a1 and 2-6, I got the 300 2.8. I already had the 600f4 and both tcs. After my first day in the kayak with the 300 and 2x I was astonished at the difference in af accuracy, af acquisition speed and most of all the clarity
...Show more →

As always, I think there is a fair amount of sample variation out there. I rented an a7R6 and the 300 with the 2X, and while I was super impressed with the performance, it wasn't the sharpness that I found class leading. It was the stabilization. The experience of looking through the viewfinder with the 300 with the teleconverter was terrific, much better than with my 200–600. The sharpness, on the other hand, was just good, not amazing and not clearly better than with the zoom. Bokeh was definitely nicer, though.

The cost is also bit over the top (though understandably in line with its competition). Hopefully the new 600 6.3 will be more affordable as rumored.



Sep 10, 2026 at 03:18 PM
ps09
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p.8 #13 · New Lenses?


you got a dropped one


Sep 10, 2026 at 03:24 PM
pdog109
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p.8 #14 · New Lenses?


seaSharp wrote:
As always, I think there is a fair amount of sample variation out there. I rented an a7R6 and the 300 with the 2X, and while I was super impressed with the performance, it wasn't the sharpness that I found class leading. It was the stabilization. The experience of looking through the viewfinder with the 300 with the teleconverter was terrific, much better than with my 200–600. The sharpness, on the other hand, was just good, not amazing and not clearly better than with the zoom. Bokeh was definitely nicer, though.

The cost is also bit over the top (though
...Show more →

I would hope the 300 would have better stabilization as its a newer lens than 200-600 and GM vs G? I think the cost of the 300 is worth it though because you are paying for the ability to have 2.8 and also use it as 3 lenses (but I only use it mostly as 600 5.6 ) and also its feather light, at least compared to 600f4. If the 600 6.3 does indeed out-perform the 300+2x TC i'll have another agonizing decision to make haha.



Sep 11, 2026 at 12:07 AM
dfreese
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p.8 #15 · New Lenses?


I'm patiently waiting, but there are a lot of 300mm for sale right now, and it is tempting. I have one offer at 4500 with a bag and replacement foot and more. But I want to see what's coming and how it performs.

pdog109 wrote:
I would hope the 300 would have better stabilization as its a newer lens than 200-600 and GM vs G? I think the cost of the 300 is worth it though because you are paying for the ability to have 2.8 and also use it as 3 lenses (but I only use it mostly as 600 5.6 ) and also its feather light, at least compared to 600f4. If the 600 6.3 does indeed out-perform the 300+2x TC i'll have another agonizing decision to make haha.




Sep 11, 2026 at 12:24 AM
aCuria
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p.8 #16 · New Lenses?


EB-1 wrote:
I have not used a 300/2.8 is decades, so I have not the experience. I don't do sports or fashion or whatver they are used for pros. Did they build the lens around the TCs?

I'm not convinced that DO/PF is so valuable anymore for weight, and I don't like the weird borkahs sometimes created. But 1kg will be flimsy and have some compromises, probably not even the marketed aperture and high light falloff.

There is an exponential increase in cost for high grade lenses based on diameter. 107mm does not seem a lot larger than 95 mm, but most all
...Show more →

I suppose the 600/6.3 is 95mm to keep costs down.



Sep 11, 2026 at 03:12 AM
Alan Parker
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p.8 #17 · New Lenses?


Starting to look pretty real to me







Sep 11, 2026 at 09:11 AM
pdog109
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p.8 #18 · New Lenses?


SAR post from today: Multiple trusted sources confirmed Sony will announce the new 400mm and 600mm GM lenses on September 15 at around 3/4 pm!


Sep 11, 2026 at 12:45 PM
ChrisMak
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p.8 #19 · New Lenses?


I guess we may now assume that these lenses will actually be announced next week and are real.
Which is great i.m.o. if only for seeing whether Sony is able to equal the Nikon Z400/4.5 and Z600/6.3, which would be a great achievement for them if you realize that Nikon has such a legacy designing first class lenses.

I'm not interested in the 400/4.5 myself, but will for sure be getting the 600/6.3. Good as teleconverters have gotten, I greatly prefer a bare prime lens if possible. The thought of a 26cm 1kg 600mm GM prime is insane really.



Sep 11, 2026 at 01:19 PM
pdog109
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p.8 #20 · New Lenses?


ChrisMak wrote:
The thought of a 26cm 1kg 600mm GM prime is insane really.


The future is now old man.
There's some comments on the SAR post that say the 600 6.3 at 2.5m MFD is too good to be true and that Sony put a TC in the lens to achieve that. Honestly i don't care about MFD, birds don't usually let me get that close.



Sep 11, 2026 at 01:33 PM
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