To be fair to their weather sealing, the 100-400mm Sony is an externally zooming lens with variable volume, compared to the Canon lenses you mentioned which are internal zooming lenses with fixed volume. The Sony inherently has to move air in and out of the lens, there’s no way around that, which allows it to ingest moist air in humid conditions and would explain why it developed that condensation.
Ziggy
March 28, 2019 11:47 pm
Just a BTW, Panasonic also have some bodies and lenses each with IS, that work together. Eg G9 & 100-400mm.
Yeshe Dorje
October 17, 2018 2:33 pm
Dvir–Thank you so much for your wonderful and very comprehensive review. If I tried to comment on your stunning photos I fear no words would suffice or do justice to your extraordinary talent. I have had the FE 100-400 GM for a year now and it has managed to surprise me almost every time I have made use of it. Although I have never had this condensation problem you ran into (with this GM lens), I have found that very same issue when I was living in Nepal. If the temperature where you store your gear (in very humid environments) is significantly different from where you are shooting, the condensation can really make a mess of many cameras–at the sensor–and most lenses. I am skeptical that any manufacturer has found a perfect fix for this under all conditions. If you are able to just open your gear in the exact location where you will be shooting and let it acclimatize there for a period before use there is far less chance of condensation being a problem. One question I have for you which you did not cover or mention at all in your review. Did you shoot any photos w/o the adapters but with the camera set to APSC mode? I often use this to change the lens from a 100-400 to a 150-600 mm equivalent. I would be very interested to know if the 1.4X or 2X adapters produced far superior results to the cropped factor shooting mode.
Ramon Morales
August 27, 2018 9:18 pm
Dvir, Thanks for the review. I am considering getting this lens with the A7iii. Perhaps I missed it but I did not see any comments in your post about the autofocus performance of the lens when using the teleconverters. Could you discuss your findings on that? Thanks
The performance with the Sony FE Teleconverters is under the “Sharpness and Features” section. Here is an excerpt from that section regarding performance with Teleconverters;
“) With the SEL1.4TC (1.4x) tele-converter
The lens performs exceptionally well when it is coupled with the SEL14TC 1.4x tele-converter, losing very little sharpness and contrast. I did not notice any differences in autofocus performance either, so if you need to get closer to your subject, you can use this combination with full confidence. Keep in mind that you lose a stop of light, so the lens becomes an f/8 lens on the long end. If you have sufficient light, then it is not a problem and you can keep the teleconverter mounted to the lens at all times. However, if you shoot in low-light conditions, then the lens by itself is going to give you the best autofocus accuracy. 6) With the SEL20TC (2.0x) tele-converter
Initially, I was somewhat skeptical of how well the SEL20TC teleconverter would work with the Sony 100-400 GM. On paper, adding the teleconverter creates an impressive 200-800mm stabilized lens, but the 2-stop loss of max aperture means you are working with an f/9-11 max aperture range. Such narrow apertures greatly limit the camera’s focusing system, and most cameras won’t even properly autofocus with a lens that has a narrower aperture than f/8. Surprisingly, the Sony Alpha 9 can focus with the Sony 100-400 GM with the added teleconverter and even does so surprisingly well when used in good light. You lose most of the A9’s ability to track small and/or erratic subjects, but you can still follow larger birds moving in a constant direction with ease and even speedier subjects such as flying Frigate Birds can be tracked adequately in good light. If you are photographing a still subject, the focusing capabilities of the 100-400GM/SEL20TC combo are quite reliable (especially when you utilize the Focus Limiter) and I was able to use with combination with good success. Overall, the focusing capabilities of the lens and camera take quite a hit with the Sony FE 2x Teleconverter in place, but the combination remains highly usable under the right conditions.”
I believe that this lens will make a wonderful combination with the Sony A7III and it is highly recommended.
Jose E Hernandez
August 27, 2018 7:41 am
Just returned from Pantanal where I used this lens with the A9 exclusively because the 100-400 range turned to be outstanding for photographing jaguars. I had rain and drizzles and experienced not condensation problems. I purchase a Arca-Swiss type foot from a RRS and solve that shortfall. I experienced repeated problems with the AF system freezing and having to turn camera on/off to getting it working again but this may be a camera issue and not the lens. The AF system also repeatedly failed to autofocus when photographing fish hawks while striking the water to catch prey. Use several AF modes with no improvements. My Canon gear has delivered better AF performance but this may be due to the 2.8 aperture versus the Sony 5.6. Maybe the new Sony 400 will have better AF performance than the 100-400 mm. I also had my 400 Canon 400 2.8 MKII with the IDxii which I did not to take them out of the bag. The 100-400 and A9 combination & lightness of weight permitted me to use them without need for a monopod or tripod. That is a great advantage. But the bottom line is image quality and those I obtained without focusing issues were outstanding.
Tom B.
August 8, 2018 7:31 pm
Excellent review with excellent images, thank you!
James
August 6, 2018 12:53 pm
Dvir-Thanks for the review, overall how did you feel the Sony compared against the Canon 100-400?
James, I would say that they are quite comparable, which I believe says a lot about both lenses. It isn’t an easy comparison to make given that the camera body you use them with makes a big difference. They are both very sharp throughout the entirety of their focal length range. I do believe that the Sony takes teleconverters better than the Canon lens. As an overall package, the Sony system is much lighter and I feel it is more suited for birds-in-flight photography due to this and the Sony A9’s lock on focus whereas I would probably trust the Canon combo in inclement weather much more so than the Sony. I would like to shot them side-by-side one day and I hope to review the Canon 100-400 for photographylife in the near future so keep an eye for that.
Any lens that changes volume when focused or zoomed, and this one appears to grow in length when zoomed, is by definition not sealed. Ambient air MUST move into and out of the lens every time it’s zoomed. Seals can be effective at keeping water out, but not air or the dust and moisture it inevitably contains. Drop the temperature of the lens too quickly and the moisture present in the air already inside the lens might condense. If the lens body is substantially constructed of magnesium then I might expect it to transfer heat faster and exacerbate this problem. I have never touched either lens but my understanding is that the Canon 200-400 does not expand when zoomed and therefore is not an air pump like this Sony. But then the Canon is a true pro lens and much more expensive. I’m not defending the Sony but it’s a simple fact the seals are only effective against water droplets and not air. If it was really sealed it would try to compress the air inside when collapsed and thus it needs to be designed to facilitate the free flow of air.
The points you bring up are very valid. Indeed the best weather sealed lenses are those without any changes in size as you zoom them in or out as it is much easier to seal such a lens. As you state, both the Canon 200-400 and 70-200 don’t expand when zoomed and this enhances their ability to withstand difficult weather and high moisture. On this trip I also had a Tokina 12-24 lens with me for some snapshot photography and that lens is a zoom that does not expand when zoomed in or out but Tokina does not list it as weather sealed and indeed it isn’t. The lens suffered a similar problem as the Sony and my intention with this review was not to single Sony out for the quality or lack thereof of their weather sealing as much as it was intended to highlight a potential problem with using the lens in high humidity situations. While it is not full proof comparison, I can say that I have used Canon’s 100-400mm lens in similar situations in the past and didn’t experience the same problems but I cannot make a like for like comparison as I did not have the Canon lens with me on this trip. I hope to test Canon’s 100-400 soon and could possibly do this in Mexico and we can see how well it behaves in this regard.
Tim Mayo
August 6, 2018 12:17 pm
Superb review Dvir Barkay and excellent images. I’ve owned this lens since it launched and also written my own review on my site alphashooters.com. I’ve used the lens in both light and heavy showers with my a6500, a7R III and a9 and so far have not suffered any water/moisture ingress issues. However, I’ve yet to test it in a high humidity environment so this could well be a different story. I’ll be taking this lens to Borneo with me next month so I won’t have long to wait to find out. Needless to say, if the lens does suffer the same fate as yours, I will be a little peeved off!
Thank you for the kind words Tim. I hope that the lens holds up for you in Borneo. It should offer a good challenge given the high humidity there though I believe that this behavior is at it’s worst when you subject the lens to drastic changes in temperature and humidity which of course creates this strong condensation. Do write back to us with your results once you test the lens in Borneo as I am sure other readers would benefit from another user experience. Overall, the Sony is a beautiful lens and I really liked it’s functionality, image quality and superb focusing and was unhappy to have this one issue come up as otherwise I felt it an almost perfect lens given the price point.
Mark D Burgess
August 6, 2018 12:15 pm
My camera platform was the Konica Minolta back when Sony acquired the brand. I waited for 6 months with no movement for Sony and so I sold that equipment and purchased a Nikon D200 with the 18-70 kit lens and the 100-400 zoom. How many years has it been, and Sony has just come out with a 400 f2.8 and a 100-400. They have virtually ignored the telephoto market.
Mark–I think that your comment is either too harsh or else not very well informed. Sony technology is leading the mirrorless camera field and their line of G Master Lenses are the equal of any on the market. Why do you say, “They have virtually ignored the telephoto market”? Do you have your head in the sand? The new Sony 400 mm f2.8 GM is the best top end prime tele available. The 70-200 mm f2.8 is also an excellent lens. Do they have as deep a lineup as the Canon and Nikon lenses that have been produced for the older mirrored DSLRs? No, not yet. But the G Master lenses are not only super but the new lenses being introduced by other manufacturers–such as all the Sigma Art Lenses and Zeiss for Sony’s FE line– show that pro quality lenses at virtually all focal lengths are either now available or rapidly coming on line. Sony has not ignored Tele lenses but it certainly can’t accomplish production of as many lenses as Canon or Nikon were able to produce over a period of decades while it is also leading in cutting edge mirrorless camera technology.
I think you have to look at the lens line up for canon, Nikon, and see for yourself. Don’t take it personally unless you work for sony. The idea is to state facts and spur a healthy discussion.
To be fair to their weather sealing, the 100-400mm Sony is an externally zooming lens with variable volume, compared to the Canon lenses you mentioned which are internal zooming lenses with fixed volume. The Sony inherently has to move air in and out of the lens, there’s no way around that, which allows it to ingest moist air in humid conditions and would explain why it developed that condensation.
Just a BTW, Panasonic also have some bodies and lenses each with IS, that work together. Eg G9 & 100-400mm.
Dvir–Thank you so much for your wonderful and very comprehensive review. If I tried to comment on your stunning photos I fear no words would suffice or do justice to your extraordinary talent.
I have had the FE 100-400 GM for a year now and it has managed to surprise me almost every time I have made use of it. Although I have never had this condensation problem you ran into (with this GM lens), I have found that very same issue when I was living in Nepal. If the temperature where you store your gear (in very humid environments) is significantly different from where you are shooting, the condensation can really make a mess of many cameras–at the sensor–and most lenses. I am skeptical that any manufacturer has found a perfect fix for this under all conditions. If you are able to just open your gear in the exact location where you will be shooting and let it acclimatize there for a period before use there is far less chance of condensation being a problem.
One question I have for you which you did not cover or mention at all in your review. Did you shoot any photos w/o the adapters but with the camera set to APSC mode? I often use this to change the lens from a 100-400 to a 150-600 mm equivalent. I would be very interested to know if the 1.4X or 2X adapters produced far superior results to the cropped factor shooting mode.
Dvir, Thanks for the review. I am considering getting this lens with the A7iii. Perhaps I missed it but I did not see any comments in your post about the autofocus performance of the lens when using the teleconverters. Could you discuss your findings on that? Thanks
Hello Ramon,
The performance with the Sony FE Teleconverters is under the “Sharpness and Features” section. Here is an excerpt from that section regarding performance with Teleconverters;
“) With the SEL1.4TC (1.4x) tele-converter
The lens performs exceptionally well when it is coupled with the SEL14TC 1.4x tele-converter, losing very little sharpness and contrast. I did not notice any differences in autofocus performance either, so if you need to get closer to your subject, you can use this combination with full confidence. Keep in mind that you lose a stop of light, so the lens becomes an f/8 lens on the long end. If you have sufficient light, then it is not a problem and you can keep the teleconverter mounted to the lens at all times. However, if you shoot in low-light conditions, then the lens by itself is going to give you the best autofocus accuracy.
6) With the SEL20TC (2.0x) tele-converter
Initially, I was somewhat skeptical of how well the SEL20TC teleconverter would work with the Sony 100-400 GM. On paper, adding the teleconverter creates an impressive 200-800mm stabilized lens, but the 2-stop loss of max aperture means you are working with an f/9-11 max aperture range. Such narrow apertures greatly limit the camera’s focusing system, and most cameras won’t even properly autofocus with a lens that has a narrower aperture than f/8. Surprisingly, the Sony Alpha 9 can focus with the Sony 100-400 GM with the added teleconverter and even does so surprisingly well when used in good light. You lose most of the A9’s ability to track small and/or erratic subjects, but you can still follow larger birds moving in a constant direction with ease and even speedier subjects such as flying Frigate Birds can be tracked adequately in good light. If you are photographing a still subject, the focusing capabilities of the 100-400GM/SEL20TC combo are quite reliable (especially when you utilize the Focus Limiter) and I was able to use with combination with good success. Overall, the focusing capabilities of the lens and camera take quite a hit with the Sony FE 2x Teleconverter in place, but the combination remains highly usable under the right conditions.”
I believe that this lens will make a wonderful combination with the Sony A7III and it is highly recommended.
Just returned from Pantanal where I used this lens with the A9 exclusively because the 100-400 range turned to be outstanding for photographing jaguars. I had rain and drizzles and experienced not condensation problems.
I purchase a Arca-Swiss type foot from a RRS and solve that shortfall. I experienced repeated problems with the AF system freezing and having to turn camera on/off to getting it working again but this may be a camera issue and not the lens. The AF system also repeatedly failed to autofocus when photographing fish hawks while striking the water to catch prey. Use several AF modes with no improvements. My Canon gear has delivered better AF performance but this may be due to the 2.8 aperture versus the Sony 5.6. Maybe the new Sony 400 will have better AF performance than the 100-400 mm.
I also had my 400 Canon 400 2.8 MKII with the IDxii which I did not to take them out of the bag. The 100-400 and A9 combination & lightness of weight permitted me to use them without need for a monopod or tripod. That is a great advantage. But the bottom line is image quality and those I obtained without focusing issues were outstanding.
Excellent review with excellent images, thank you!
Dvir-Thanks for the review, overall how did you feel the Sony compared against the Canon 100-400?
James, I would say that they are quite comparable, which I believe says a lot about both lenses. It isn’t an easy comparison to make given that the camera body you use them with makes a big difference. They are both very sharp throughout the entirety of their focal length range. I do believe that the Sony takes teleconverters better than the Canon lens. As an overall package, the Sony system is much lighter and I feel it is more suited for birds-in-flight photography due to this and the Sony A9’s lock on focus whereas I would probably trust the Canon combo in inclement weather much more so than the Sony. I would like to shot them side-by-side one day and I hope to review the Canon 100-400 for photographylife in the near future so keep an eye for that.
Great thanks for the info.
Any lens that changes volume when focused or zoomed, and this one appears to grow in length when zoomed, is by definition not sealed. Ambient air MUST move into and out of the lens every time it’s zoomed. Seals can be effective at keeping water out, but not air or the dust and moisture it inevitably contains. Drop the temperature of the lens too quickly and the moisture present in the air already inside the lens might condense. If the lens body is substantially constructed of magnesium then I might expect it to transfer heat faster and exacerbate this problem. I have never touched either lens but my understanding is that the Canon 200-400 does not expand when zoomed and therefore is not an air pump like this Sony. But then the Canon is a true pro lens and much more expensive. I’m not defending the Sony but it’s a simple fact the seals are only effective against water droplets and not air. If it was really sealed it would try to compress the air inside when collapsed and thus it needs to be designed to facilitate the free flow of air.
The points you bring up are very valid. Indeed the best weather sealed lenses are those without any changes in size as you zoom them in or out as it is much easier to seal such a lens. As you state, both the Canon 200-400 and 70-200 don’t expand when zoomed and this enhances their ability to withstand difficult weather and high moisture. On this trip I also had a Tokina 12-24 lens with me for some snapshot photography and that lens is a zoom that does not expand when zoomed in or out but Tokina does not list it as weather sealed and indeed it isn’t. The lens suffered a similar problem as the Sony and my intention with this review was not to single Sony out for the quality or lack thereof of their weather sealing as much as it was intended to highlight a potential problem with using the lens in high humidity situations. While it is not full proof comparison, I can say that I have used Canon’s 100-400mm lens in similar situations in the past and didn’t experience the same problems but I cannot make a like for like comparison as I did not have the Canon lens with me on this trip. I hope to test Canon’s 100-400 soon and could possibly do this in Mexico and we can see how well it behaves in this regard.
Superb review Dvir Barkay and excellent images. I’ve owned this lens since it launched and also written my own review on my site alphashooters.com. I’ve used the lens in both light and heavy showers with my a6500, a7R III and a9 and so far have not suffered any water/moisture ingress issues. However, I’ve yet to test it in a high humidity environment so this could well be a different story. I’ll be taking this lens to Borneo with me next month so I won’t have long to wait to find out. Needless to say, if the lens does suffer the same fate as yours, I will be a little peeved off!
Thank you for the kind words Tim. I hope that the lens holds up for you in Borneo. It should offer a good challenge given the high humidity there though I believe that this behavior is at it’s worst when you subject the lens to drastic changes in temperature and humidity which of course creates this strong condensation. Do write back to us with your results once you test the lens in Borneo as I am sure other readers would benefit from another user experience. Overall, the Sony is a beautiful lens and I really liked it’s functionality, image quality and superb focusing and was unhappy to have this one issue come up as otherwise I felt it an almost perfect lens given the price point.
My camera platform was the Konica Minolta back when Sony acquired the brand. I waited for 6 months with no movement for Sony and so I sold that equipment and purchased a Nikon D200 with the 18-70 kit lens and the 100-400 zoom. How many years has it been, and Sony has just come out with a 400 f2.8 and a 100-400. They have virtually ignored the telephoto market.
Mark–I think that your comment is either too harsh or else not very well informed. Sony technology is leading the mirrorless camera field and their line of G Master Lenses are the equal of any on the market. Why do you say, “They have virtually ignored the telephoto market”? Do you have your head in the sand? The new Sony 400 mm f2.8 GM is the best top end prime tele available. The 70-200 mm f2.8 is also an excellent lens. Do they have as deep a lineup as the Canon and Nikon lenses that have been produced for the older mirrored DSLRs? No, not yet. But the G Master lenses are not only super but the new lenses being introduced by other manufacturers–such as all the Sigma Art Lenses and Zeiss for Sony’s FE line– show that pro quality lenses at virtually all focal lengths are either now available or rapidly coming on line. Sony has not ignored Tele lenses but it certainly can’t accomplish production of as many lenses as Canon or Nikon were able to produce over a period of decades while it is also leading in cutting edge mirrorless camera technology.
I think you have to look at the lens line up for canon, Nikon, and see for yourself. Don’t take it personally unless you work for sony. The idea is to state facts and spur a healthy discussion.
I Don’t like and understand when someone takes a reply personally unless they work for sony. The idea is to state facts and spur a healthy discussion.