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Rollei HFT Planar 50mm/f1.8 Singapore made
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PostPosted: Sat Oct 09, 2010 10:39 am    Post subject: Rollei HFT Planar 50mm/f1.8 Singapore made Reply with quote
Aperture doesn't work, need instructions for disassembly.


PostPosted: Tue Oct 19, 2010 10:13 am    Post subject: Reply with quote
This lens is relay hard to assemble. If you don't have experience, don't do it!
There is trouble with assembling, because the rear part can't be disassembled it's not easy to put anything back together (focusing guide, aperture control and aperture stop down control).
Anyway, you will start with front ring, which holds nameplate ring. Just unscrew it entire.


PostPosted: Tue Nov 02, 2010 2:17 pm    Post subject: Reply with quote
BRunner wrote:
This lens is relay hard to assemble. If you don't have experience, don't do it!
There is trouble with assembling, because the rear part can't be disassembled it's not easy to put anything back together (focusing guide, aperture control and aperture stop down control).
Anyway, you will start with front ring, which holds nameplate ring. Just unscrew it entire.


Thank you. I found this link http://www.bigeye.url.tw/big5/d_cz28_2.htm (from some other post on this forum) and it makes me wonder. I know this is a different lens from a different maker but it's rear part looks identical. It seems there is no explanaion on the site but they managed to get an aperture ring and the whole rear part off.


PostPosted: Sat Dec 18, 2010 2:08 pm    Post subject: Reply with quote
Because I have the same question, I'll bring this topic back to life. Can anyone tell me how to disassemble the Rollei Planar 50/1.8 (I actually have the Voigtländer Color-Ultron but the construction should be identical)?

I managed to unscrew the front ring (turn the lens to min. focus distance, then grip it with a rubber glove and turn counterclockwise). Then I removed the focus ring by removing the three screws in it, but now don't see how to continue.

The aperture coupling is broken (a spring and the aperture pin came out) and it's impossible to repair it from the rear.


PostPosted: Sat Dec 18, 2010 2:19 pm    Post subject: Reply with quote
Here is some help:

http://gabriel.mp3-tech.org/blog/index.php?category=10

Check in the middle of the article.. the Ifbagon is a French re-branded Rollei Wink


PostPosted: Sat Dec 18, 2010 2:31 pm    Post subject: Reply with quote
Well found! I couldn't find anything when I took mine apart...

the QBM version I have is slightly different, but in principle the same, mine has a M/A switch so looks a little different inside.


PostPosted: Sat Dec 18, 2010 2:57 pm    Post subject: Reply with quote
Keysersoze27 wrote:
Here is some help:

http://gabriel.mp3-tech.org/blog/index.php?category=10

Check in the middle of the article.. the Ifbagon is a French re-branded Rollei Wink


Thanks, but the rear of my QBM mount Voigtländer is totally different from that M42 Ifbagon. Only the QBM mount plate can be unscrewed, but after that the rear is one solid block of metal, so disassembly should be done from the front somehow. The problem is that I cannot remove the lens assembly by turning it past the 0.45m mark.


PostPosted: Sat Dec 18, 2010 5:15 pm    Post subject: Reply with quote
AhamB wrote:
Keysersoze27 wrote:
Here is some help:

http://gabriel.mp3-tech.org/blog/index.php?category=10

Check in the middle of the article.. the Ifbagon is a French re-branded Rollei Wink


Thanks, but the rear of my QBM mount Voigtländer is totally different from that M42 Ifbagon. Only the QBM mount plate can be unscrewed, but after that the rear is one solid block of metal, so disassembly should be done from the front somehow. The problem is that I cannot remove the lens assembly by turning it past the 0.45m mark.


If it's the same as the Rollei then although it looks solid it isn't. There is a ring you can unscrew which exposes the screws.


PostPosted: Sat Dec 18, 2010 8:09 pm    Post subject: Reply with quote
Xpres wrote:

If it's the same as the Rollei then although it looks solid it isn't. There is a ring you can unscrew which exposes the screws.


In the 2nd post, BRRunner also says the rear cannot be disassembled. I don't see any "ring" that can be turned/removed, so the construction will not be identical to the Rollei then. The style of the focus ring and aperture ring is identical to the rollei then, but the contruction of the rear must be different.


PostPosted: Sat Dec 18, 2010 9:42 pm    Post subject: Reply with quote
I guess they're put together differently then. But there must be a 'way in' somehow.

This is the ring on the german 'made by rollei' type. Just above the red M.



PostPosted: Sun Dec 19, 2010 1:43 pm    Post subject: Reply with quote
Thanks for the picture. Mine doesn't have that ring. It's also missing the M/A switch. The must have removed that for later models to cut production costs, making the lens more difficult to service in effect. Neutral
My serial is 237xxxx.


PostPosted: Tue Dec 21, 2010 4:16 pm    Post subject: Reply with quote
dimitrygo wrote:
BRunner wrote:
This lens is relay hard to assemble. If you don't have experience, don't do it!
There is trouble with assembling, because the rear part can't be disassembled it's not easy to put anything back together (focusing guide, aperture control and aperture stop down control).
Anyway, you will start with front ring, which holds nameplate ring. Just unscrew it entire.


Thank you. I found this link http://www.bigeye.url.tw/big5/d_cz28_2.htm (from some other post on this forum) and it makes me wonder. I know this is a different lens from a different maker but it's rear part looks identical. It seems there is no explanaion on the site but they managed to get an aperture ring and the whole rear part off.

There is a link on the same site for 1.8/50.
http://www.bigeye.url.tw/big5/d_ro50_18.htm

If you cannot put all things back. Try to replace the aperture spring with another strong spring and put it in the reverse direction(step 7 to Cool.

Hope this may help.


PostPosted: Tue Dec 21, 2010 7:06 pm    Post subject: Reply with quote
The rear of my Voigtländer with the QBM mount plate removed:





PostPosted: Tue Dec 21, 2010 7:25 pm    Post subject: Reply with quote
AhamB wrote:
The rear of my Voigtländer with the QBM mount plate removed:


It is quiet similar to my copy. I think it can open from the rear. Remove the two screw first as indicated in the photo.


PostPosted: Tue Dec 21, 2010 8:01 pm    Post subject: Reply with quote
calvin83 wrote:
Remove the two screw first as indicated in the photo.

Phew! Shocked I finally figured out how to open it, but it does not open from the rear. You have to turn the lens to the minimum focus distance (0.45m) and then turn the lens assembly (inner focus helicoid) counterclockwise as much as possible, and then turn the outer focus helicoid clockwise, and repeat this process until the lens assembly is completely out.

The part that was attached with the two screws and one part of the aperture mechanism kept getting stuck, which is why I thought at first that the lens could not be opened like this. You have to look carefully what is happening.

Edit: I managed to attached the spring that normally keeps the aperture open to the aperture lever from the other side, so now the aperture is always in stop down mode.

Now the challenge is to get it back together again, which may be difficult because I have to screw the two parts of the helicoid back together again while lining up with the arm from the aperture ring.


PostPosted: Wed Dec 22, 2010 5:12 am    Post subject: Reply with quote
AhamB wrote:
calvin83 wrote:
Remove the two screw first as indicated in the photo.

Phew! Shocked I finally figured out how to open it, but it does not open from the rear. You have to turn the lens to the minimum focus distance (0.45m) and then turn the lens assembly (inner focus helicoid) counterclockwise as much as possible, and then turn the outer focus helicoid clockwise, and repeat this process until the lens assembly is completely out.

The part that was attached with the two screws and one part of the aperture mechanism kept getting stuck, which is why I thought at first that the lens could not be opened like this. You have to look carefully what is happening.

Edit: I managed to attached the spring that normally keeps the aperture open to the aperture lever from the other side, so now the aperture is always in stop down mode.

Now the challenge is to get it back together again, which may be difficult because I have to screw the two parts of the helicoid back together again while lining up with the arm from the aperture ring.

As far as I remember, there is three positions which you can screw the two parts. You have to try which one is the right position. After you find the right posisiton, you have to adjust the infinity position.

If you will not change your lens to QBM mount, open it from the back is much more easy as it does not require you to adjust the infinity and you don't need to care about the original aperture mechanism.


PostPosted: Wed Dec 22, 2010 12:05 pm    Post subject: Reply with quote
calvin83 wrote:
As far as I remember, there is three positions which you can screw the two parts. You have to try which one is the right position. After you find the right posisiton, you have to adjust the infinity position.

If you will not change your lens to QBM mount, open it from the back is much more easy as it does not require you to adjust the infinity and you don't need to care about the original aperture mechanism.


The good news that I managed to get the lens back together, with working aperture control(!) after a lot of pondering and trying. I've had to take apart the helicoid like 6 or 7 times because the aperture coupling wasn't correct or I didn't get infinity focus. You can see this already when you put the focus ring on: there is a gap between it and the lens, which should not be of course. I still do not have perfect infinity focus, but I'll get there. Wink


PostPosted: Wed Dec 22, 2010 2:26 pm    Post subject: Reply with quote
AhamB wrote:
calvin83 wrote:
As far as I remember, there is three positions which you can screw the two parts. You have to try which one is the right position. After you find the right posisiton, you have to adjust the infinity position.

If you will not change your lens to QBM mount, open it from the back is much more easy as it does not require you to adjust the infinity and you don't need to care about the original aperture mechanism.


The good news that I managed to get the lens back together, with working aperture control(!) after a lot of pondering and trying. I've had to take apart the helicoid like 6 or 7 times because the aperture coupling wasn't correct or I didn't get infinity focus. You can see this already when you put the focus ring on: there is a gap between it and the lens, which should not be of course. I still do not have perfect infinity focus, but I'll get there. Wink

Great! You should be able fix it soon. Smile


PostPosted: Wed Dec 22, 2010 8:57 pm    Post subject: Reply with quote
I have infinity focus now, but I think I still haven't got it back together completely correctly. Now the focus doesn't stop at 0.45m, which I don't understand.

The mount adapter was taking quite a lot of force to mount to my 5D, by the way. It's better now that I unscrewed the part that's there to push down the aperture pin. I think it was pressing against the mirror box, above the electronic contacts.


PostPosted: Thu Dec 23, 2010 7:02 am    Post subject: Reply with quote
AhamB wrote:
I have infinity focus now, but I think I still haven't got it back together completely correctly. Now the focus doesn't stop at 0.45m, which I don't understand.

The mount adapter was taking quite a lot of force to mount to my 5D, by the way. It's better now that I unscrewed the part that's there to push down the aperture pin. I think it was pressing against the mirror box, above the electronic contacts.

Adjust the infinity after you put the conversion adaptor to the lens. I don't sure why your lens can focus beyond 0.45m but I would suggest you check the alignment of the focusing mechanism.

My converted lens mounts to my lens easily. Make sure it is installed properly.

P.S.
If your 5Ds mirror is unshaved, the mirror will hit the protection ring on the rear when you focus infinity.


PostPosted: Mon Dec 27, 2010 2:12 pm    Post subject: Reply with quote
It turns out I wasnt close to infinity focus at all. Now I got it almost correct, just need to tune it a little bit. The focus stops at 0.45m now as it should.


PostPosted: Fri Mar 04, 2011 10:37 am    Post subject: Reply with quote
calvin83 wrote:
There is a link on the same site for 1.8/50.
http://www.bigeye.url.tw/big5/d_ro50_18.htm

Hi, I have the opportunity to get one "singapore made" 1.8/50.
It seems to be like the one in Calvin's link.

Will it mount on my 5D MkII or will it hit the mirror ?
If it hits the mirror, is there a simple way to solve this issue ?

Cheers,
Smile


PostPosted: Fri Mar 04, 2011 10:53 am    Post subject: Reply with quote
Olivier wrote:
calvin83 wrote:
There is a link on the same site for 1.8/50.
http://www.bigeye.url.tw/big5/d_ro50_18.htm

Hi, I have the opportunity to get one "singapore made" 1.8/50.
It seems to be like the one in Calvin's link.

Will it mount on my 5D MkII or will it hit the mirror ?
If it hits the mirror, is there a simple way to solve this issue ?

Cheers,
Smile

Sand the retaining ring of the rear element. Check the botton of this link in the same site.


PostPosted: Mon Nov 25, 2013 8:42 pm    Post subject: Reply with quote
For easier way to fix this tipe of lenses tutorial here
http://forum.mflenses.com/carl-zeiss-planar-or-voigtlander-color-ultron-50-1-8-repair-t49749.html


PostPosted: Mon Nov 25, 2013 10:23 pm    Post subject: Reply with quote
Thank you for your tutorial srdjan. Smile
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