Dissassembling Domiplan 2.8/50 Automatic Lens
HTML-код
- Опубликовано: 23 июл 2024
- Dissassembling Meyer Optik Domiplan 2.8/50mm Automatic Lens.
WARNING: There is a large chance of damaging your lense. Do due diligence and reearch the topic.
WARNING: Some nameplates do not pop off and require a nameplate removal tool. Check your model. If it is threaded, you will need nameplate remover tool for this and the method in the video will not work. Instead, it will break the lens.
This one is a later non-zebra version.
M42 screw mount.
The actions shown here will probably damage your lense.
Disassembling should take place in a dust-free environment.
Using glowes is suggested.
If you plan completely to disassemble and clean the lens you need to use proper helicoid grease at reassembly time.
00:32 removing nameplate
00:52 removing back cover
1:24 removing aperture lever
2:54 removing rivets
3:07 removing diaphragm cover
4:08 removing aperture ring
4:40 removing focusing ring
5:16 adjusting focusing system
6:01 reassembling the diaphragm
7:02 putting diahphragm cover back
7:34 check focus ring and rivets
8:05 Putting aperture lever back 
Развлечения
WARNING! Following this guide I've broke the nameplate!
This (maybe in some versions) simply needs to be UNSCREW.
It's made of plastic so be careful, it's quite fragile.
Thanks much for posting this, came here looking for some clues on how I can fix my zebra version that appears stuck wide-open, and will follow your directions soon.
So did it work and could you bring life back to your aperture? I have a similar problem with a similar Zebra lens. Guess this is a very common problem and possibly due to rust jamming over the vertical transfer mechanism and ring.
@@samsen3965, I ended up with another copy of the lens that works and I haven't gotten around to taking the working lens apart to see what's missing in my non-working copy. I can only guess something unnoticed flew off during my stab at cleaning the oily aperture blades. ¯\_(ツ)_/¯ Thanks for reminding me, I'll add it back to my list because I'm still curious how the mechanism was designed to operate.
@@lewisfrancis9858 🙏 . Wish you all the best and I'm sure, to say the least, you'll have a great time playing with it.
What a great job is showing this Soooooooo Well. The best I've seen on YT. Thanks, dealy
NAMEPLATE IS THREADED in some of these, so DO NOT SCREWDRIVE it out of its thread. Gently press in and turn counterclockwise. Then the aperture will come off, so be careful.
EVERYONE, PLEASE READ THIS BEFORE PUSHING IT HARD TO BREAK
STEP 1: You're going to break the name plate using a screw driver to pull it up. Simply leave the name plate in place and unscrew it by pressing down and in a circular motion with your fingers. If you use the screwdriver you will break the part which helps you keep the aperture ring in place (the name plate will push the aperture ring down in place when you reassemble it). Had to learn this by breaking mine. FU dude.
Yes me too, i'm really angry about this.
Quite correct. A hammer achieves the same result. Try holding the diaphragm ring down when rotating the name plate with the help of a rubber pad as this can decrease the friction between the plastic name plate and the metallic diaphragm ring unde which sits a metallic wire ring acting as a spring.
I am shocked by the crappy construction of this lens and quality of screws used: one of the worst I have ever seen.
nice, thanks for sharing
Good guide! Although I am having trouble putting the aperture lever back with the springs still attached to the lens... I have the zebra version
same
Just broke my nameplate, thanks man!
How many people have done this?!!! I'm getting worried to proceed now, though it looks really easy.
Today I finally got around to taking a stab at the lens. Cleaned and reassembled the oil-covered aperture assembly so that it was closing down nicely by manually pushing the diaphram lever, but after final reassembly the rear actuation pin doesn't do anything, which is the same problem it had originally, only this time I couldn't blame it on stuck blades. Any ideas? Is there a small part that could have come off the aperture lever unnoticed that I need? Thanks.
Maybe some of these have a pop-up nameplate, but many do not. Fortunately, I tried screwing it off first, which worked fine. Also, the reassembly instructions leave a bit to be desired. The little tab which you say transfers power vertically from a horizontal input can get stuck in the wrong position, making final assembly impossible unless you see it and realize what the problem is. Other than that, these were nice instructions, and I managed to disassemble and reassemble this lens. This seems like a difficult one.
Hi. Thanks for this, it was a great help. The aperture blades on mine were stuck. Gave them a clean and it’s working again. Happy days!
One thing though, after fiddling for over an hour trying to put it back together, I assembled it without the two tiny springs. Would there be anything against it to leave it like this?
Hi Floxfox! Please explain how did you put two small springs back then was assembling the lens (on 2.06 minute) I can not put them back. It is stuck in outer case. I think for this operation you need the special tools or it must to be also two small bearings on the ends of the springs. Thank you.
Hi. This video was really useful. I've managed to disassemble the lens as the aperture was stuck wide open. I have the mechanism working now, but see that it is stiff. I believe that the spring that pulls the aperture open has lost strength. Would you know if I could buy a replacement for this and where? Thanks for this video!
I cant reput the part with the springs, i arrive just to the middle, there is a secret? Can you help me
There's a hinged tab in the piece that goes over the springs - it can get rotated into the wrong position and block the piece from seating onto the main body of the lens. It's in the area under the pin that controls the aperture blades. Get it into the right position, and it will all go together fairly smoothly.
BTW, I found this lens to be a real bear. Nothing seems to go smoothly with this lens. Not fun at all.
So how do you 'declick' this lens so that the aperture moves seamlessly whilst triggering the blades like a Helios 44 2/58?
Remove the ball bearing shown at 4:20, this is what gives the aperture its 'clicks'.
0:40 is wrong