I own the a6400 and while I am happy with the images it produces even without IBIS (many samples in my Flickr collections - link in signature), I am getting more and more frustrated with the shorter battery life (I also have an A7Riii which has the same battery as the a6600 so that is the basis for my battery-life comparison).As I age (over 65 now), the weight of the FE 200-600 lens to give me the necessary reach for birding is becoming more of an issue. The weight can also be an issue if your safari will include any flights between camps as most have a weight restriction of 20kg total (includes handcarry) (only 15kg in Zimbabwe).Given all that, if you are happy with the images you are getting with your RX100V, then I would seriously consider the RX10iv.Good luck with your decision and enjoy your safaris (I am off on one in May).This image might help:CameraSizeLinkRX10iv vs a6400 w FE200-600 vs a6600 w Tamron 150-500

Thx José!  IIRC the colours are a credit to PL6's  "HDR Realistic" preset.

DutchMM wrote:Thx José! IIRC the colours are a credit to PL6's "HDR Realistic" preset.Thanks Mike, will try that preset.

piticoto wrote:DutchMM wrote:Welcome to E-Mount, from another A-mount refugee.To echo what Jose says, the a6600 is a superb partner for the 135GM. I don't have that lens with me today, but this morning and early afternoon I shot 662 frames with the Sony 70-350G on the front. After the shoot, and a USB based transfer to laptop, the power stood at94%. All the reviews say you will get better than the rated number of shots, but .. come on! And this was in RAW+JPG.A sampleISO 320, F8, 1/1250, +1.3 - developed in DxO PhotoLab 6I hope you enjoy whatever choice you makeMike M94% after 662 frames RAW+JPG? It recharged the battery while transferring via USB.I doubt the short time it takes to download 662 frames be enough to make a big dent in recharging a FZ battery.  Laptop USB ports are not high powered like newer USB chargers.

I did wonder whether the USB transfer would recharge the battery.  It appears that - using my non Sony (but FastCharge compatible) cable - there is no increase in battery % during a 550 file transfer from the camera to my laptop.   The power stayed at 87% from before to after the transfer.This morning I was trying to shoot with S&Q at time, the rest Continuous Shooting: Hi; the other day I was shooting in Continuous Shooting: Mid.  This - and the fact that I was outside for much longer - is probably the explanation for the relatively higher power drain.HTHMike M

Chefski wrote:I own the a6400 and while I am happy with the images it produces even without IBIS (many samples in my Flickr collections - link in signature), I am getting more and more frustrated with the shorter battery life (I also have an A7Riii which has the same battery as the a6600 so that is the basis for my battery-life comparison).As I age (over 65 now), the weight of the FE 200-600 lens to give me the necessary reach for birding is becoming more of an issue. The weight can also be an issue if your safari will include any flights between camps as most have a weight restriction of 20kg total (includes handcarry) (only 15kg in Zimbabwe).Given all that, if you are happy with the images you are getting with your RX100V, then I would seriously consider the RX10iv.Good luck with your decision and enjoy your safaris (I am off on one in May).This image might help:CameraSizeLinkRX10iv vs a6400 w FE200-600 vs a6600 w Tamron 150-500Great comparison, thank you!  If I indeed go for the A6600, I think I would buy the 18-135 as my first lens.  That would cover probably 95% of my day to day requirements.  For the safaris, I would probably try to rent something like the Sony 100-400.  I rented the equivalent A-mount 100-400 on a trip to Kenya and while there were some shots I would have liked a longer lens, I got most of the shots I wanted.The guide for one of our upcoming trips (to Uganda) shoots with a Nikon FF camera and a max 600mm and has some amazing shots on his social media.  He recommended 600mm for the more traditional safari days and something like a 50-200 for the gorilla trekking since they can be quite close at times.

bswiz wrote:Chefski wrote:I own the a6400 and while I am happy with the images it produces even without IBIS (many samples in my Flickr collections - link in signature), I am getting more and more frustrated with the shorter battery life (I also have an A7Riii which has the same battery as the a6600 so that is the basis for my battery-life comparison).As I age (over 65 now), the weight of the FE 200-600 lens to give me the necessary reach for birding is becoming more of an issue. The weight can also be an issue if your safari will include any flights between camps as most have a weight restriction of 20kg total (includes handcarry) (only 15kg in Zimbabwe).Given all that, if you are happy with the images you are getting with your RX100V, then I would seriously consider the RX10iv.Good luck with your decision and enjoy your safaris (I am off on one in May).This image might help:CameraSizeLinkGreat comparison, thank you! If I indeed go for the A6600, I think I would buy the 18-135 as my first lens. That would cover probably 95% of my day to day requirements. For the safaris, I would probably try to rent something like the Sony 100-400. I rented the equivalent A-mount 100-400 on a trip to Kenya and while there were some shots I would have liked a longer lens, I got most of the shots I wanted.I'm just getting back into Sony APS-C. I have the RX10iv and like it a lot, but want the larger sensor as an alternative. I've ordered a used a6500, which is about half the price of a used a6600. I also ordered the Tamron superzoom 18-300 which has good reviews (see Dustin Abbott, for one). I'm also getting a used Sony 10-18 to cover ultra-wide, and thinking about the 18-135 for a smaller option. Here's a size comparison of the a6500 with the 18-135 and 18-300 and the RX10iv.https://bit.ly/3KfbsWiDick

Unless you shoot a lot in low light, where the larger sensor and potential of larger aperture lenses may make some difference between the A6xxx and the RX10, the big difference will be the physical size. The RX10 IV is always big. The A6xxx can be much smaller when you want it to be, if you marry it with a small lens. I made this comparison for you.However, overall, probably if I were in your shoes, and already owned the RX100 V, as you say, then I'd get the RX10IV. My reason is that the RX100 can be your small camera and the RX10 for when you need long reach. (Again unless I did a lot of low light shooting and wanted to carry a 1.4 prime lens with an A6xxx. In that case you will get better IQ from the A6xxx.)Between the A6400 and A6600 that's been covered by others.  I own the A6600 because I tend to keep cameras and I'm not sure what features I might want down the road, but it's no big deal either way.

bswiz wrote:Chefski wrote:I own the a6400 and while I am happy with the images it produces even without IBIS (many samples in my Flickr collections - link in signature), I am getting more and more frustrated with the shorter battery life (I also have an A7Riii which has the same battery as the a6600 so that is the basis for my battery-life comparison).As I age (over 65 now), the weight of the FE 200-600 lens to give me the necessary reach for birding is becoming more of an issue. The weight can also be an issue if your safari will include any flights between camps as most have a weight restriction of 20kg total (includes handcarry) (only 15kg in Zimbabwe).Given all that, if you are happy with the images you are getting with your RX100V, then I would seriously consider the RX10iv.Good luck with your decision and enjoy your safaris (I am off on one in May).This image might help:CameraSizeLinkRX10iv vs a6400 w FE200-600 vs a6600 w Tamron 150-500Great comparison, thank you! If I indeed go for the A6600, I think I would buy the 18-135 as my first lens. That would cover probably 95% of my day to day requirements. For the safaris, I would probably try to rent something like the Sony 100-400. I rented the equivalent A-mount 100-400 on a trip to Kenya and while there were some shots I would have liked a longer lens, I got most of the shots I wanted.The guide for one of our upcoming trips (to Uganda) shoots with a Nikon FF camera and a max 600mm and has some amazing shots on his social media. He recommended 600mm for the more traditional safari days and something like a 50-200 for the gorilla trekking since they can be quite close at times.The Sony 70-350 is not so big but gives you a 525 mm corresponding reach on the A6400.

Hi,late for the party which is running almost a week by now already.From my POV it's a lot about how important is for your work the "exchangeable lens" concept of an a6400/6600? It would allow mounting lenses outside of the range of 24-600 eq. offered by the RX10Mk3/4. So if it is likely you'd go wider or longer these cams are the way to go. Or if you want faster lenses. Or if you want on certain occasions a smaller physical size than the RX10Mk3/4. So for quite a lot of special purposes there are advantages getting an A6400/6600 (and you can add possibly a bit of better low light / high ISO performance but difference depends to some amount on the used lens).Now for almost everything else the RX10Mk4 is simply great: a photographic swiss-army-knife-tool which ticks surprisingly high in IQ, speed, AF performance, offers an extremely useful range of FL, no hazzles with swapping lenses hence much less prone to dust issues. For intense zoom operation though (which can be slow sometimes when going frequently from wide to full tele) battery power drops pretty quickly so one should have at hand replacement battery/batteries.