yukosteel

I support darknj idea to send 55-200mm back to service, it sounds like electronic issue. But first try to find other Fuji body to confirm that issue there reproduces. I've checked details on aperture control design from this nice article of Lensrentals https://www.lensrentals.com/blog/2016/02/the-long-awaited-scary-and-amazing-fuji-lens-teardown/ You can see that there are 2 optical sensors that scan positions of rectangles inside of aperture ring. If it works for single sub-step switch - something may be wrong with sensors, maybe some dirt particle fall on one. https://www.lensrentals.com/blog/media/2016/02/aperture-control.jpg

Wow! It's much better shot for understanding how ale metal parts are connected, thank you Aswald! Looks like it's a prototype, I see white plastic simulation of Aperture Module there : ) It's very interesting to see Focus Module cut differently here, and that it moves as well during zoom. Looks like your shot is taken for 50mm, while DPreview shot is for 140mm. Some legend here:

Which camera do you use? In which mode? Aperture ring of 55-200 has no positions like on fixed lens, so if it works for 1/3 stop it means lens is ok, probably something is tweaked in camera. I'd try e.g. camera re-set to double-check that.

Sounds like you want auto-preview of taken picture. SCREEN SET-UP > IMAGE DISP. > CONTINUOUS

It depends on "DISP.BACK" setting, or selected Auto-ISO or Auto-DR

I keep discovering more details on XF 50-140mm disassembly. Found these nice pics on DPreview (by Barney Britton) : Fuji XF 50-14mm, cut in half Fuji XF 16-50mm, cut in half Thank you Google ! : ) Search by picture link works great, found 2000x1500 size for 50-140mm 2.8 - that's something more reliable for disassembly analysis : ) https://s-media-cache-ak0.pinimg.com/originals/6e/8b/b5/6e8bb549474f353c471cdbfac06120f5.jpg

It may happen that marketing trick with Mitakon clones is used to raise some more money in addition to the kickstarter. If there are photographers that prefer to buy re-tested and inspected Mitakon selected from few samples, and so labeled "Made in Germany" for extra price - there are nothing wrong about such approach. There are a lot of "lab photos" of Trioplan 100mm 2.8 posted on Globall FB page: http://facebook.com/meyeroptikgoerlitzEN Sorry, but I'll never call that Globall company or their overpriced lens "Meyer-Optik", that brand is connected to the factory passed in history, and I personally don't think it's right to speculate on that. There are also brands on market that may sound like German, but in fact they are Japanese production, with also nice quality. However currently that items are often priced like old German collection items. Just imagine what could be with "rebranded" cameras:

Maybe Globell Deutschland order that two listed lens from other Chinese manufacturer, based on their blueprints. It'd be interesting to discover more details, will try to research. Well, explored more details about new Trioplan 100mm 2.8 . I didn't find any other manufacturer, so probably this lens is not just "repainted" and "re-tested" samples from Zhongyi or other brand. It could be that new Trioplan 100mm 2.8 is really assembled by Globell. However it's definitely overpriced, like corresponding Nocturnus/Figmentum lens. Probably Globall disassemble and test each imported sample before put "Made in Germany" sign, and looks like it's legal approach in Germany. If that's true - that should increase price a bit comparing to Mitakon, but not 2x-3x times like it is now : )

Good point, it looks like Mark I - Mitakon 35mm 0.95 I think we should be careful with all that modern "Made in Germany" things. There are actually not so many plants in Germany. It's quite easy to register physical company address and re-use one of old brand. But it looks like the real plant (so real "made in" ) is in China. I've met similar approach before in other product areas (knifes, kitchenware, binoculars). When you read "made in Germany", etc. but there are no real plant. And later you can find exactly same production pictures online on Chinese factories. I know, Chinese plants can produce very high quality products, and it's fine when Mitakon is sold for $600. But in this particular case the extra +$1180 is taken just for sign "made in Germany" and fancy cardboard box with German office address. I've explored this morning and realized that actual company name is Globell Deutschland, they just purchased "Meyer-Optik" name. And every lens they have in their list looks like is a clone of corresponding Chinese or Russian lens (BTW, some of that Russian lens are also produced in China in fact). There are plenty information online, most valid suggestions I've found on different forums: Figmentum 35mm f/2 = Zhongyi Mitakon 35mm f/2 Figmentum 85mm f/2 = Zhongyi Mitakon 85mm f/2 Nocturnus 35mm f/0.95 = Zhongyi Mitakon 35mm f/0.95 Mark I Nocturnus 50mm f/0.95 = Zhongyi Mitakon 50mm f/0.95 Found one interesting statement on one forum: "Current rules mean that products can be labelled as “Made in Germany” even if more than 90 percent of the work in making them takes place in other countries." : )

Very interesting. It sounds like manufacturer defect. I think camera should react on that issue and send error warning. Do images come exposed right? I think it'd be good at least call Fuji Support and report that problem. Some kind of manufacturer defects should be repaired for free even after the warranty expired. Fortunately the XF 27mm is so light and small that shipping costs will be very low. Just checked prices, looks like one of Hong Kong seller have it for only $217 now : ) I purchased few XFlens from that seller and they work great.

On this eBay lot it looks a bit different then picture on FR from February 27, 2015. There is hood mount, and "0.95" on DOF scale. Other then that it still looks like Mitakon. While pictures on Meyer-Optik are still showing slightly different body design, though same size : )

Wow, 16-55 - that's another very interesting Fuji beast lens. One extra screw ? If it has large thread step I'd not worry, but if it's frequent thread - probably that screw should hold important metal part ?

Sounds very strange. I've tried to ON/OFF EVF autorotation on X-E2, but it rotates correct, and is showing picture in portrait orientation. One thing that comes to my mind - you may use LCD Screen for taking pictures, and in portrait orientation accidentally put finger on top of EVF sensor.

Yeah, that hair was on the wall, not on the glass, I hope no more left inside : ) There are some other dust left. To get into that areas requires much more time than just few hours to go with more serious disassembly. But that dust particles are even not in the image frame, and just too little to affect anything. So I'll just keep that as is.

It's psychologically much easier to start with badly broken lens : ) Once you do that many times, disassembly converts to interesting activity, especially when you don't have any guide. Some steps can be only done in lab, because they require further optic re-alignment on precise equipment, so I just avoid such things if possible. I only removed 14 screws, and the most tricky part was to gently decouple electronic contacts - they are very fragile. Before disassembly of any highly expensive gear just imagine that it is already ruined to zero value. It will help a lot to stay calm, confident and focused during the process.

Did you try to clean up the lens contacts? What camera says when you change aperture values - just showing that number but aperture does not move during shot?

I'd also not open 50-140mm without real need. Even in this case I only disassembled areas which look very clear to me, with 100% confidence that doing that will not harm the lens performance. Looks like that taking out rear lens group for cleaning is pretty safe and does not cause any misalignment after assembly. I didn't move further for cleaning other lens areas, for that steps I need more information first. Some shots from that procedure: http://www.fuji-x-forum.com/topic/2760-disassembly-xf-50-140mm-rear-area/ I very like the design of internal zoom, it makes the air mostly circulate inside of 50-140mm lens without pulling dust from the outside.

It looks like the rear group module frame is just firmly attached to the metal cylinder. I think it can be micro-adjusted by putting different tension to each of 3 screws, so during the assembly I've put special attention to tighten all 3 screw equally. After the assembly the lens is still razor sharp wide open with equal good sharpness in the corners, so that module sits right on it's place. I think for this 50-140mm lens the weakest area where dust may come in - is the mount. Then dust can travel further over the time. In my sample the dust appeared because someone disassembled this XF 50-140mm before - I noticed slightly damaged screws. I think that first disassembly is made by skilled person, but in a slightly dusty environment. I even found one cats hair inside : )

I've found this YouTube video of partial disassembly of XF 27mm 2.8 - you can get better idea how complex it is.

XF 50-140mm - view to the main board. There are 6 connectors need to be gently decoupled first. XF 50-140mm - main board removed. Three smaller silver screws hold rear lens group on place XF 50-140mm - rear lens group module XF 50-140mm - next optical module that is connected with at least four springs and freely moves perpendicularly to optical axis. There are electromagnets that control this module.

I had a need to clean up rear glass area of XF 50-140mm 2.8. Usually I don't spend time on making pictures, but Fuji lens deserve that, so make few shots to show you how this great lens look inside. It's engineered with very high quality. XF 50-140mm mount ring and rubber sealing XF 50-140mm with mount ring removed, there are four brass shims firmly attached to internal metal cylinder XF 50-140mm - white sealing o-ring around rear body lement

I've recently partially disassembled 40-150mm from the rear side. It's very well built lens, and internal metal chamber has very thick walls. There are many sealing rings in every moving area. There are two moving modules inside, probably same as in XF 55-200mm. One module I think is OIS, powered by electromagnets and connected with four springs to the frame - it moves perpendicularly to optical axis, and makes little noise. Another module is bigger group of lens - moving in direction of optical axis and produce that famous knocking sound, I think it's autofocus. Or maybe they function vice versa. When 50-140mm is powered on - the constant noise is produced by electromagnets of autofocus module, ready for action. When you power on OIS - that module is also moves.

I think it's normal. When I do the same with XF 50-140mm I clearly hear that something is moving inside. When I turn on camera with lens, it is not moving anymore. It should be related to focusing magnets, or OIS magnets. Just mount it on camera, turn on, and listen while moving again. First time I noticed such strange behavior on m4/3 system with Panasonic Leica Macro-Elmarit 45mm f/2.8 ASPH OIS . It was scary to hear such noise inside that lens, but that's how OIS is designed there. I'm wonder if this can cause any damage if you transport such type lens in OFF mode, let say on very bad offroad : )

Nice shots. I'd recommend to stay "light" for your travels. I'd personally choose 18-55mm and make all the shots with it. My spare lens would be 35mm f1.4 or 35mm f2 (it's good to have backup jus tin case primary lens got broken). I moved from Nikon D600 plus a lot of heavy and fast AF glass, as I mostly use primes. With Fuji-X system everything become so small and versatile, that I carry camera every day with me, no matter where I go.

Thanks milandro, I'll probably order from there if two other sellers will not have it in 1-2weeks like they promised.