Summary of my RF 200-800mm testing

One last piece of advice to newbies would be don't try any of this stuff if you are not willing to choke up for enough computer to run it. I had an i9-9900 with GTX 1080 which worked fine until the "AI" stuff started to drop and then it was suddenly glacial. I built a new computer with an i9-13900 and RTX 4070ti and it keeps the compute time to a minimal level. Also, you need substantial storage space and a good internet connection (particularly for Topaz). These programs all get updated regularly and the updates are several gigabytes every time. I think PL is the least bandwidth consumptive and and Topaz the most. Adobe is somewhere in the middle (unless you have the full Adobe package and then it is about the same as Topaz). I recently got a 2Gb bi-directional fiber connection (courtesy of our local power company) and the downloads are now trivial, but on the previous connection, they were tedious.
Mine can take a while so I've learned to run noise reduction, distortion, and aberration corrections before I sleep or while I'm out in case I need to use the the computer for something else. I think mine only has 1gb ram and the external drive's speed is slow, but it does work.
 
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We had a couple of days ago, an extremely rare sighting for us a female Red-necked Phalarope, 18cm long as well, at about the twice the distance as yours away (bird about 120 px long compared with ~250px for yours at 1600mm). I couldn't see it with my x8 bins but I focussed on the indicated area. Not exactly publishable, but it was identifiable! Whether an extender adds anything, depends on whether the increase in resolution will theoretically see more. The photos just before then, posted in the Birds thread, of the Ospreys did give much more detail at 1600mm, but needed a lot of processing.

View attachment 217048
Have you tried enlarging it with Topaz? or, I'd like to see the uncropped image if you care to share. The heat waves have a dreamy quality that appeals to me even if no magazine would publish it, if you made a series of similar images and used them for high quality prints, I believe some galleries would sell them, but often they want you to spend a lot of frames. For example, if you want to sell it for $50, they want you to invest $50 for paying them to frame it and then you have to sell it for $100. It can be a hassle and I don't agree with having to double the buyer's price, but that's the way the game is played...
 
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Mine can take a while so I've learned to run noise reduction, distortion, and aberration corrections before I sleep or while I'm out in case I need to use the the computer for something else. I think mine only has 1gb ram and the external drive's speed is slow, but it does work.
With the setup I mentioned, none of the processes takes more than about 6 seconds with a 45MP image. That computer also has 64 GB of RAM, but so long as you don 't run too many programs or multiple files at once. If your time has value, a good computer is worth the money.
 
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I have a question regarding an other topic involving the R5 + RF 200-800mm. In this case not using a TC.
Recently during an excursion I/we had an encounter with a Red-footed Falcon. Initially we were not 100% sure about the identification, so we wanted proof.

The falcon was flying against the sky at quite some distance and flying in the direction from us. But I had no problem knowing where it was using my binoculars, so I knew I was pointing the camera in the correct direction and that the bird was there somewhere on the R5 screen.

The R5 had severe problems to get the bird in focus. I use back-button focusing and have copied the set-up that "Whistling Wings Photography" is using. I.e. Eye-AF using the whole field with one button, Eye-AF using Zone with the second button, and with the third button Spot-AF (no Eye-AF).
Trying all three buttons one at a time I still had these severe problem for the R5 to focus. I tried to focus at 200mm, 500mm and 800mm, same problem. Sometimes it would find the bird and for a moment the bird was possible to glimpse, but in a wink of time it was lost again. The end result: no sharp pictures of the falcon, some blurred pictures, and some where no bird was possible to see at all.

Have you or anybody else out there encountered a similar problem, and in such case do you have a solution?

Only recently tried a couple of BIF shots with the R5 + RF 20-800mm. I did experience similar issues to you, that I don't have using my adapted EF L lenses.

My standard approach is to start with the wide zone horizontal AF and then switch to Eye-AF once acquired in the wide zone. I found the only way to get anything with the 200-800mm was to re-focus on a tree (etc) at about the same distance before trying to acquire the bird. I did get a reasonable shot, at around 300mm, of a medium sized bird flying towards me and a blurred shot of a small fast bird at 700mm flying across me. Both at about 30 metres. The AF on this lens seems slow for BIF - of course a focus limiter wouldn't hurt.

Maybe someone else on the forum has more insight into this.
 
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I have a question regarding an other topic involving the R5 + RF 200-800mm. In this case not using a TC.
Recently during an excursion I/we had an encounter with a Red-footed Falcon. Initially we were not 100% sure about the identification, so we wanted proof.

The falcon was flying against the sky at quite some distance and flying in the direction from us. But I had no problem knowing where it was using my binoculars, so I knew I was pointing the camera in the correct direction and that the bird was there somewhere on the R5 screen.

The R5 had severe problems to get the bird in focus. I use back-button focusing and have copied the set-up that "Whistling Wings Photography" is using. I.e. Eye-AF using the whole field with one button, Eye-AF using Zone with the second button, and with the third button Spot-AF (no Eye-AF).
Trying all three buttons one at a time I still had these severe problem for the R5 to focus. I tried to focus at 200mm, 500mm and 800mm, same problem. Sometimes it would find the bird and for a moment the bird was possible to glimpse, but in a wink of time it was lost again. The end result: no sharp pictures of the falcon, some blurred pictures, and some where no bird was possible to see at all.

Have you or anybody else out there encountered a similar problem, and in such case do you have a solution?
The AF is not as good as with the RF 100-500mm, which has 2 AF motors and wider f-number. I use just eye-AF with the whole field and BBF for BIF, 800mm for distant slow flying birds and zoom out to 400 or 500mm for fast ones closer up. The only problem I really find is the AF can’t keep easily when the bird rapidly changes its distance, leading to fewer tack sharp shots. For my Puffin trip at the end of the month, I’ll take the 100-500mm on to the island. I’ve posted quite a few BIF shots with the 200-800, including even some Swallows and Swifts at 400-500mm.
 
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I have taken manyn 100s of BIF with the 200-800 on the R5, and only post a selection. Here are a few more taken at random. All are 100% crops (1 px = 1 px of original). The Oystercatcher and Little Gull are small birds flying fast across the line of vision.

309A0039-DxO_Marsh_Harrier_flying-lss.jpeg309A2779-DxO_Red_Kite_flying_with_prey-ls-s.jpeg309A3811-DxO_Little_gull_flying_800mm-ls-s.jpeg309A8425-DxO_Marsh_Harrier_flying-ls-s.jpeg309A9126-DxO_Kite_Flying_637mm-lss.jpeg309A9156-DxO_Oyster_Catcher_Flying.jpg309A9599-DxO_Female_osprey_flying-lss.jpeg
 
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Foe amusement, here is a Blackheaded Gull taken yesterday, miles away against a background, and upscaled 3x in Topaz. I am impressed by the lens picking up good contrasting subjects at long distance, which would be too small for the AF at 500mm.

309A0227-DxO_Blackheaded_gull_flying_with_twig- 3x.jpeg
 
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Have you tried enlarging it with Topaz? or, I'd like to see the uncropped image if you care to share. The heat waves have a dreamy quality that appeals to me even if no magazine would publish it, if you made a series of similar images and used them for high quality prints, I believe some galleries would sell them, but often they want you to spend a lot of frames. For example, if you want to sell it for $50, they want you to invest $50 for paying them to frame it and then you have to sell it for $100. It can be a hassle and I don't agree with having to double the buyer's price, but that's the way the game is played...
It was too small for Topaz! Here is the 1600mm shot, downscaled 2x to get it on the site. The bird is the dot in the centre.

309A9690-DxO_Red-Knicked_Phalarope_Full_1600mm_50%.jpg
 
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It was too small for Topaz! Here is the 1600mm shot, downscaled 2x to get it on the site. The bird is the dot in the centre.

View attachment 217112
You must have excellent vision to have seen the dot was a bird!
I think the uncropped image has a great sense of the environment.
It looks like a wooden "π" to the right. What is it?

It will never look like a photo, but I have run images through Topaz more than once. Maybe with the blur it can become something interesting for you.
 
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You must have excellent vision to have seen the dot was a bird!
I think the uncropped image has a great sense of the environment.
It looks like a wooden "π" to the right. What is it?

It will never look like a photo, but I have run images through Topaz more than once. Maybe with the blur it can become something interesting for you.
It was part of an old wooden gate or stile or something long gone.
 
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OK first of all I am no expert as attested to by the pics I post on this site. :p
Just got my 200-800 and took a few quick shots. In full sun at 1/800 800mm auto ISO results in ISO 12800
Maybe I need to move to Arizona and take pics of slow moving rocks instead of birds.
 
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OK first of all I am no expert as attested to by the pics I post on this site. :p
Just got my 200-800 and took a few quick shots. In full sun at 1/800 800mm auto ISO results in ISO 12800
Maybe I need to move to Arizona and take pics of slow moving rocks instead of birds.
If you needed iso 12800, you must have left the lens cap on or the equivalent. The sunny 16 rule is that is that at f/16 you shoot with 1/100s at iso 100. So at 1/800s f/9, 1/250s. Or, at iso 12800 and f/9 the shutter speed would be 1/40,000s.
 
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I believe you but can you explain the math?
It’s just the standard exposure triangle using the number of stops required when you change iso, speed and aperture. On a sunny day you get the right exposure shooting at f/16 at 1/100s and iso 100. If you needed iso 12800 for 1/800 and f/9, then something was amiss.
 
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OK first of all I am no expert as attested to by the pics I post on this site. :p
Just got my 200-800 and took a few quick shots. In full sun at 1/800 800mm auto ISO results in ISO 12800
Maybe I need to move to Arizona and take pics of slow moving rocks instead of birds.
Definitely something amiss. Should be no more than ISO 1000 even with fairly low reflectance subject, 2000 at the max in sunlight. I have many shots taken on very dark winter days at 1/800 and ISO 6400.
 
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Definitely something amiss. Should be no more than ISO 1000 even with fairly low reflectance subject, 2000 at the max in sunlight. I have many shots taken on very dark winter days at 1/800 and ISO 6400.
I will have to do some more tests compared to my sigma 150-600. This morning took a few shots at 600mm (not full sun yet) and so far the pics are darker than the inside of a cow.
 
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I will have to do some more tests compared to my sigma 150-600. This morning took a few shots at 600mm (not full sun yet) and so far the pics are darker than the inside of a cow.
There is only 1 stop of difference at the long end from your 150-600, so that should be easy to verify. Half the speed or twice the ISO should give you the same exposure.
 
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