Review: Viltrox 85 mm f/1.8 STM AF PFU RBMH

Viltrox PFU RBMH 85 mm f/1.8 STM AF

The Viltrox PFU RBMH 85mm f/1.8 STM is cheap and offers AF. Is it the best bang for your buck 1.8/85 for Sony E-mount at this moment?

Sample Images

Viltrox PFU RBMH 85 mm f/1.8 STM AF
Viltrox 1.8/85 | f/1.8
Viltrox PFU RBMH 85 mm f/1.8 STM AF
Viltrox 1.8/85 | f/1.8
Viltrox 1.8/85 | f/5.6


Specifications / Version History

Next to the AF version there also is a manual focus version of this lens. As far as I know the optics are the same and the main difference can be found in the housing.

  • Diameter: 79 mm
  • Length: 92 mm
  • Weight: 636 gram
  • Filter thread: 72 mm
  • Number of aperture blades: 9
  • Close Focusing distance: 0.8 m
  • Mount: Sony FE

The Viltrox PFU RBMH 85 mm f/1.8 STM AF can be found new for around 310$ at* or 289โ‚ฌ at*.
Link marked with * are affiliate links, we will receive a small commission if you buy something via these links and it won’t cost you anything else. This helps us keeping the blog running, thank you ๐Ÿ™‚

When bought at one of the bigger camera stores in Europe it will set you back at 379โ‚ฌ but you don’t risk customs hassle.


I bought this lens at full retail price from my own money. Viltrox offered me to pay the netto loss after selling the lens when the review is done.

Viltrox 1.8/85 | f/1.8

Handling / Build Quality

The Viltrox PFU RBMH 85 mm f/1.8 STM AF is heavy and feels very solid. The lens is made of metal and glass only. Most, but not all markings are engraved and filled with paint.
The focus ring is very wide with a nice texture and feels very nice. The focus ring runs smooth but resistance is a bit on the high side for me. Furthermore, the focus throw is a tad long too, near 300ยฐ. But in the end I liked the manual focus experience a lot, and I think it is one of the best implementations of focus-by-wire so far.

Viltrox PFU RBMH 85 mm f/1.8 STM AF

The lens lacks an aperture ring so the aperture needs to be changed with the camera. At least on my sample the aperture blades were aligned lousily and changing the aperture made a lot of noise. Updating the firmware of the lens significantly reduced the noise, but I’m still not sure how durable the aperture system is.

The is also a flimsy plastic lens hood included, it doesn’t sit really tight and is also a bit reflective it seems.

On my a7II with and L-bracket handling was quite OK, but walking around with the camera around you neck for some time isn’t much fun due to the weight. Furthermore there are no control buttons on the lens like with the Sony GM lenses which is a bit bothersome.



Wide open vignetting is roughly 1.8 EV, at f/2.8 vignetting is reduced to 1 EV and at f/4 it is only 0.5 EV. A respectable performance.




Viltrox PFU RBMH 85 mm f/1.8 STM AF sharpness

f/1.8: The center already is excellent, the midframe looks very good and the corners are good to very good.

f/2: No much difference compared to f/1.8, only midframe and corners might be a tiny little bit better.

f/2.8: A small improvement in midframe and corners, the corners are very good now, the midframe very good to excellent.

f/4: The center and midframe are both excellent now, the corners are very good to excellent.

f/5.6: Excellent acrossย  the frame.

f/8: Diffraction kicks in, the image is a bit softer.

f/11: Diffraction reduces sharpness to very good levels.

Sharpness near MFD

Already wide open the center looks very good, the corners look a bit worse but are still usable. At f/2.8 the center is excellent, and the corners look very good.

Portrait distance (234 cm)

Wide open the center and midframe already look very good, the extreme corners stay a bit behind, but who will put the subject in the extreme corner?
At f/2.8 the corners improve a lot and looks good.
The Viltrox is simply very sharp at portrait distances (and at all other distances) and perfectly usable from wide open.

Focus shift

There is significant focus shift, see the test photo’s below.

  • f/1.8

  • f/4

  • f/8


Autofocus is quick on my a7II but not that reliable, especially at half body and full body distances. The focus was often a bit behind the subject. For shoulder portraits AF works mostly fine though.
From f/2.2 the aperture will open up to focus.

To make sure the inaccurate AF wasn’t caused by my a7II I asked my friend Rick to do some testing on his a7III and a7rIII. His findings matched mine and I think it is save to state that auto focus accuracy isn’t good, especially considering other reports like this one. I used the newest firmware of the lens for these tests!


The Viltrox 1.8/85 unfortunately suffers from moderate but complex pincushion distortion that reminds you of a wide angle lens. The distortion is hard to correct (I didn’t succeed) so I would avoid this lens in you plan to shoot architecture.

Chromatic aberrations

Longitudinal chromatic aberrations (LoCA) are present but not really distracting.

Lateral chromatic aberrations (LaCA) are moderate but easily correctable.



Viltrox 1.8/85 | f/1.8
Viltrox 1.8/85 | f/1.8
Viltrox 1.8/85 | f/1.8

Bokeh is where the Viltrox stands out to me. Unlike many fast portrait lenses cat’s eyes are minor. The bokeh balls don’t have much outlining and backgrounds look calm in most situations due to some spherical aberrations outside the focus plane. Even very hard backgrounds like lit foliage are handled fairly well.

I had the chance to make a quick bokeh comparison with the Sony FE 1.8/85. The most obvious difference are the much more pronounced cat’s eyes you get with the FE 1.8/85. I did not had the chance to test them side by side in the field but I think in general the bokeh of the Viltrox is a little bit smoother.

f/1.8, before is Viltrox


f/2.8, before is Viltrox

The only part in the bokeh department where the Viltrox doesn’t fare that well is foreground bokeh, it can be pretty busy on some occasions as branches or grass will cause double edged structures. But the performance still is OK in most situations.

Viltrox 1.8/85 | f/1.8
Viltrox 1.8/85 | f/1.8
Viltrox 1.8/85 | f/1.8
Viltrox 1.8/85 | f/1.8



Due to the not so precisely aligned aperture sunstars are rather average. Rays are not very defined and the length of the rays isn’t equal either.

Viltrox 1.8/85 | f/11
Viltrox 1.8/85 | f/11


Flare resistance

Flare resistance is a mixed bag, in general it is quite good but with the low evening sun one runs into trouble. Ghosting can sometimes be observed, and with the sun just outside the frame veiling flare is an issue. Recomposing a bit helps a lot though.

Sometimes I even liked the veiling flare a bit ๐Ÿ˜‰


Sony FE 1.8/85
Bokeh is a little worse with a pronounced cat’s eye effect, and manual focusing isn’t nearly as nice as with the Viltrox. However, the AF is very fast and reliable and the FE 1.8/85 is almost 300 grams lighter. Used prices are a bit higher that the new price of the Viltrox.

Sony GM 1.4/85
More expensive and heavier, but bokeh is very, very good and AF is accurate. The Sony features an aperture ring, a focus-hold-button and a AF/MF switch which improves handeling a lot.
The Sony GM 1.4/85 costs around โ‚ฌ1900.

Samyang 1.4/85
A little bit lighter and even a bit faster. AF seems to be slower but reliable. The Samyang 1.4/85 costs around โ‚ฌ630.

Meike 1.8/85
Cheaper and lighter, but no AF and optically less good..

Vintage 85 mm options
Often lighter but they lack AF and I doubt they will be better, you will probably save some weight though.

For more native options make sure to check our FE list.


Pros Average Cons
  • Sharpness
  • Bokeh
  • Manual focus
  • Price
  • Flare resistance
  • CA correction
  • Build quality


  • Weight
  • Distortion
  • Autofocus

The Viltrox PFU RBMH 85 mm f/1.8 STM AF is despite some quirks a very decent performer especially at it’s price point. Optically is is very good. It is very sharp with good bokeh. Manual focusing is a joy too. Unfortunately the autofocus isn’t reliable which limits the usefulness of this portrait lens a lot.

If the lens was very small, and the price difference with e.g. the Sony FE 1.8/85 was a bit bigger one could maybe live with these quirks. But unfortunately the lens is really heavy, and a used FE 1.8/85 isn’t that much more expensive. Therefore I find it hard to recommend the Viltrox PFU RBMH 85 mm f/1.8 STM AF. If AF is important to you, you will probably be disappointed by its performance in that regard, and if you want to focus manually there are much lighter options available for the same price.

So is it a bad lens? By no means. Image quality is very good, I liked the images I took with the lens a lot and if it was somewhat lighter I would have added it to my kit.

Who is this lens for? If you are on a strict budget and mainly focus manual and you can live with the AF performance and weight, the Viltrox 1.8/85 is an interesting option to look at. It combines great sharpness and good bokeh at a low price.
Most pictures from this review can be found in full resolution isย thisย Flickr albumn.

The Viltrox PFU RBMH 85 mm f/1.8 STM AF can be found new for around 310$ at* or 289โ‚ฌ at*.
Link marked with * are affiliate links, we will receive a small commission if you buy something via these links and it won’t cost you anything else. This helps us keeping the blog running, thank you ๐Ÿ™‚

Viltrox 1.8/85 | f/1.8
Viltrox 1.8/85 | f/1.8
Viltrox 1.8/85 | f/1.8
Viltrox 1.8/85 | f/1.8
Viltrox 1.8/85 | f/1.8
Viltrox 1.8/85 | f/1.8
Viltrox 1.8/85 | f/1.8
Viltrox 1.8/85 | f/1.8
Viltrox 1.8/85 | f/1.8
Viltrox 1.8/85 | f/1.8
Viltrox 1.8/85 | f/1.8
Viltrox 1.8/85 | f/1.8
Viltrox 1.8/85 | f/7.1
Viltrox 1.8/85 | f/7.1

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My name is Juriaan, I am a passionate photographer from the Netherlands. I mainly shoot landscapes and the milkyway and I like to travel through wild landscapes around Europe.

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38 thoughts on “Review: Viltrox 85 mm f/1.8 STM AF PFU RBMH”

  1. Great review and thank you! I feel like you showed and understand the lens strengths and weaknesses well. And the Creme Golden Retriever and 2nd to last photo of the review are great!

  2. I have the Viltrox 20mm f1.8 and I am very happy with it. It is totally manual, very sharp and well made. It is quite heavy though, but I am very happy with it.

  3. Is that the Animal Eye AF on display, or your amazing manual focusing abilities? I’m curious if this kind of lens can perform with the human and/or animal Eye AF.

  4. Is there a difference between Viltrox and Samyang? issint it the same company that goes by different names, in fact many more including Walimex, Rokinon and couple more.

      1. Since you wrote this one liner about the Samyang 85/1.4, did you already try it already?
        Would it be possible to do a test of this lens?

        In don’t think the YouTube reviews are objective… They always say stuff like “yeah in my opinion…” and “scientifically there MAY be a difference…” and stuff.
        Your reviews read much more professionally and this is why I would like to see a review of the Samyang AF 85/1.4.

  5. Frightening how voluminous this lens is for a 85mm f1.8!…
    …compared to for instance old legacy lenses such as Rokkor 85mm f1.7 and Minolta MD 85mm f2.0….
    Mind you, it has the bokey of the first and the sharpness of the second…

  6. Excellent review, you convinced me to buy this lens because I don’t care for the autofocus, but I noticed that my copy has not been wrong until now, almost only in conditions of backlight. Greetings, Antonio

  7. Anyone know where the firmware version is marked in the Box when you receive it?
    Viltrox AF 85mm F1.8 STM Review? Need to know as Viltrox has 5 versions of Firmware out already for the Sony e-mount. Thanks, Don

    1. Firmware Version 1.0.1 is sold with the lens. Firmware ver 1.0.8 Must be downloaded from > download option. They are dat. Files Zipped and my computer using Windows 10 is having trouble opening the file.

  8. Hello, I have read some nice reviews for the VILTROX 85 MM F/1.8 STM AF. I have a Canon EOS RP RF mount.

    Is the above Viltrox available, or will be, could be, with RF mount for my Canon RP ?
    Or is there an adapter available and if so, how does that affect the Viltrox ?


  9. Beautiful bokeh and color rendering. It is also sharp enough.
    I think it is really a good and cheap 85mm lens.
    Thank you for review.๐Ÿ‘Œ๐Ÿ‘

    1. I still have the lens and installed the update. Although the aperture blades open a bit further, there is no relevant change in blur. So you don’t get a true f/1.6 lens.. So effectively it indeed is bogus ๐Ÿ™‚

  10. Hello Juriaan,
    Thank you for the review.
    How does the autofocus performs with latest updates ? Is it better since you wrote the article ? Do you still have front focus issues ? There are some videos on youtube reporting that it performs better compared to earlier versions of firmware. I’m wondering if you notice any difference.

  11. ich habe das Viltrox seit 2 Monaten und nach dem letzten
    Update von 19.05.2020 funktioniert nun auch der AF wie
    er soll. Ein tolles Objektiv.
    Es gibt jetzt auch ein Profil in LR CC unter Sony.
    Ich benutze es mit dem TZE-01 an meiner Nikon Z6…

  12. Question,

    First of all very insightful review, thank you sooo much. I wish i can donate to you a cup of coffee.

    I am looking at buying this lens, however, it seems like that prices has gone up as of November/2020.
    My Question is,

    I found that there are 2 version of this lens and it doesn’t tell us which is the newest one please check for

    VILTROX 85mm F1.8 STM ED IF

    Which one would you say the newest is there any source to confirm?

    Thank you.

    1. This should be the newer one “VILTROX 85mm F1.8 STM ED IF”, the older one isn’t available anymore at many places.

  13. I’m glad that you’ve updated the review. I bought my Viltrox RBMH in 2020. That time, I couldn’t agree with your conclusion especially Af and sharpness. Now, your conclusion makes sense for me. But wouldn’t it be fair to delete those pictures, which led to your first conclusion?
    Great site, I like to come back every time.

    1. The f/1.6 thing is a hoax, yes the aperture opens up more, but there is barely any extra blur. On my sample the update messed up the accuracy of the aperture values when stopping down.

    1. The main difference is that the mkII is a lot lighter, AF seems to be more accurate as well. Both lenses support eye AF. I think I would take the mkII if I had to choose now.

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