Today I did some autofocus comparisons of Viltrox 85mm F1.8 and Fujinon XF 50-140mm F2.8 lens on Fujifilm X-T30 camera.
Autofocus speed and accuracy
I performed quite simple autofocus speed comparison for the indoor shooting conditions. First target (chair corner) located 5ft from camera, and second target (bed blanket) located 16ft from camera. I used central focus point of medium size and autofocused 20 times using rear focus button starting from closer target and switching them each time.
With Viltrox 85mm F1.8 lens @ F1.8 first 20 focusings took 27 seconds, second 20 focusings took 28 seconds.
With Fujinon XF 50-140mm F2.8 lens @ F2.8 and zoomed to 85mm first 20 focusings took 25 seconds and second 20 focusings took 25 seconds.
Also when switching between lens I noticed some slight difference of binary search operation of autofocus. Fujinon focus is little more “snappy” but was hunting few times a bit longer. Viltrox lens has more noticeable focus searching back/forth movement though keep focusing very quick and also sometimes hunting a bit longer.
I’m positively surprised by Viltrox performance again. I expected Fujinon beast to focus much faster than Viltrox, but the difference is very low. Please take into account that it is not scientific measurement and comparison in particular conditions so results are not very precise. But they should give you very general idea about Viltrox autofocus speed (especially if you own Fujinon XF 50-140mm F2.8 lens).
More pictures on long shooting distance
I had chance to spend 30 minutes for a short photoshoot of Seattle channel area. Most pictures below are taken @ F1.8, and I’m personally happy about level of details this lens delivers from edge to edge. Of course @ F1.8 there is some slight vignetting, though you can get rid of it by stopping down to F2.8. Just to remind that it is a Full Frame lens, so with APS-C sensor of Fuji (or Sony) you are utilizing best optical area of the lens – the central part. That is why optical performance is so good.
I like how the OOF area looks, it’s not disturbing and can be very smooth and soft depending on the shooting distance and angle. This is great lens for portraits and can also work as all purpose lens if you don’t mind its size and weight – the sharpness and colors are very good on APS-C cameras.
Few more words about build quality
Viltrox 85mm F1.8 lens is build with attention to details. I’ve took pictures of other engravings and mount area – you can see very good level of parts machining precision. Shenzhen factories are producing high tech devices, and looks like Viltrox also sets high standards for produced optics.
Well, I can’t say more in addition that I already like Viltrox 85mm very much and enjoying shooting with it a lot. It’s great photo tool and nicely pairs with Fuji X-T30. I wish it could be smaller and lighter if made for APS-C with less amount of glass, but from the other hand I don’t want to sacrifice very good optical quality. Looks like I’ll also keep my Fujinon 50-140mm F2.8 home most of the time and take Viltrox 85mm F1.8 instead, because it will work much better indoor and other low light conditions.
With that thoughts in mind I contacted Jueying Technology and asked if I can pay for the lens because I want to keep it after review. It is not expensive lens and costs just 1/2 or 1/3 of fast Fujinon, so I was ready to buy it. They answered that I don’t need to pay and just keep it : ) That is great of course! (Thank you !) Now I’ll not think anymore about Fujinon 80mm and 90mm options – even though they may deliver much sharper details, but I’m personally not a big fan of ultra-sharp optics and like it to be just reasonably sharp, and Viltrox 85mm fits my personal taste. Now I can’t wait to see what lens they release in future. Looks like Jueying Technology know how to implement efficient autofocus support for Fuji, and I’ll expect they make another interesting AF lens.
Please let me know if you are interested to investigate any other aspect of this Viltrox 85mm F1.8, meanwhile I’ll keep using it and posting to Flickr group of Viltrox 85mm F1.8
Here is also my first review of Viltrox 85mm F1.8 lens on Fuji X-T30