Home

Please support mflenses.com if you need any graphic related work order it from us, click on above banner to order!

SearchSearch MemberlistMemberlist RegisterRegister ProfileProfile Log in to check your private messagesLog in to check your private messages Log inLog in

Mir 1B mount problem
View previous topic :: View next topic  


PostPosted: Thu Jan 22, 2009 1:40 pm    Post subject: Mir 1B mount problem Reply with quote

Anyone bumped into this: Mir 1B goes too deep to some m42 mounts. It turns almost 1/3 too much because of the bevel in the mount that I think is supposed to help attaching the lenses .. ?


PostPosted: Thu Jan 22, 2009 9:32 pm    Post subject: Reply with quote

I read somewhere that the Mir 1v is too long for some of the Canon Dslrs, and the mirror hits the back of the lens but mine have been ok on Pentax/Samsung mounts, and on my m42 cameras (several various Zenits and a Yashica), sorry I cant help more.


PostPosted: Fri Jan 23, 2009 8:39 am    Post subject: Reply with quote

I know the back hits mirror with film EOS. Fortunately it doesn't hit back lens but the ring around it. Last summer I got a surprising blackout when the mirror stuck in the up-position .. Shocked

Basically my problem is the mount part of the Mir has just too small diameter and there is a bevel there too. It goes right inside the mount. The bevel in the mount is about 0,5 mm deep and 1 mm wide. Tried to pad it with some wire but it is not a very usable solution.


PostPosted: Fri Jan 23, 2009 8:51 am    Post subject: Reply with quote



Like this.


PostPosted: Fri Jan 23, 2009 11:44 am    Post subject: Reply with quote

I had a similar problem when using the Mir with a contax/yashica adapter, it would usually be turned like 30 degrees too much, and the mirror would sometimes be blocked by the ring protecting the back lens. I trimmed that ring a bit (see the ----\ instead of -----| shape):

This lens is on its way to Dave (farside) in Ireland right now, by the way.


PostPosted: Fri Jan 23, 2009 2:18 pm    Post subject: Reply with quote

Did you try to place one "ring" done with starchy cork or hard rubber (like in olds cars motors).

Good luck.

Rino.


PostPosted: Fri Jan 23, 2009 2:40 pm    Post subject: Reply with quote

I though of that. It has to be very tiny. 0.5 x 1 ø 42 ?


PostPosted: Fri Jan 23, 2009 3:00 pm    Post subject: Reply with quote

Well. I did a lot of these and it's easy.

The first isn't good? The second bad too? Not matter. the third or the fourth will be OK.

By few cents you will fit your lens in the right way. Wink

Again, good luck. Laughing

Rino.


PostPosted: Thu Sep 26, 2013 7:30 am    Post subject: Reply with quote

put a rubber O ring ,so it wont go in toomuch


PostPosted: Thu Sep 26, 2013 8:18 am    Post subject: Reply with quote

My helios 44 M39 w/M42 adapter goes too deep into the M42-NEX adapter. I use a O-ring of 36mm inner diameter with 1.5cm thickness to fix the problem. Any O ring with similar size inner diameter should fix M42 lenses.


PostPosted: Thu Sep 26, 2013 9:10 am    Post subject: Reply with quote

calvin83 wrote:
I use a O-ring of 36mm inner diameter with 1.5cm thickness to fix the problem.


Shocked Smile

1,5mm perhaps?


PostPosted: Thu Sep 26, 2013 10:07 am    Post subject: Reply with quote

kansalliskala wrote:
calvin83 wrote:
I use a O-ring of 36mm inner diameter with 1.5cm thickness to fix the problem.


Shocked Smile

1,5mm perhaps?

I ordered 1mm, 1.5mm and 2mm O-ring and I found the 1.5mm works best as the Helios goes too deep into the adapter. O-ring is elastic so it is hard to say which one works best without trial.


PostPosted: Thu Sep 26, 2013 1:08 pm    Post subject: Reply with quote

This is probably why I think my MIR 1B is a touch soft. Rolling Eyes I shall try an O ring behind it.


PostPosted: Thu Sep 26, 2013 11:50 pm    Post subject: Reply with quote

You've got it bad? Try fitting a Jupiter 12 to your NEX!!


PostPosted: Fri Sep 27, 2013 1:17 am    Post subject: Reply with quote

philslizzy wrote:
You've got it bad? Try fitting a Jupiter 12 to your NEX!!


Tell me more Phil, we need to know the secret. Start a new post and we will follow..... Wink


PostPosted: Fri Sep 27, 2013 2:55 am    Post subject: Reply with quote

Lloydy wrote:
philslizzy wrote:
You've got it bad? Try fitting a Jupiter 12 to your NEX!!


Tell me more Phil, we need to know the secret. Start a new post and we will follow..... Wink

If you do not want to do modification on the Jupiter 12, you may following this thread(in Chinese). Wink

http://zupu.info/konica/forum.php?mod=viewthread&tid=1575


PostPosted: Fri Sep 27, 2013 3:05 am    Post subject: Reply with quote

WTF ! Shocked no way........ Laughing