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Meopta Meostigmat 1.4/70 on FF and NEX via VNEX
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PostPosted: Mon Aug 11, 2014 7:27 am    Post subject: Reply with quote

Images recovered.

Cheers
Henry


PostPosted: Mon Aug 11, 2014 1:42 pm    Post subject: Reply with quote

Amazing results! That's why I like this forum. Very Happy


PostPosted: Mon Aug 11, 2014 4:01 pm    Post subject: Reply with quote

Picture recover and update from Meostigmat
concert shooting of The King.


PostPosted: Sun Aug 31, 2014 9:35 pm    Post subject: Reply with quote

Some shots with my new VNEX + 70/1.4 on an A7R
I think it will be a great artistic lens for me, the lack of an iris does reduce it's usefulness in some conditions, a trade I'm willing to make for the character this lens can bring to the images.







PostPosted: Wed Sep 10, 2014 10:08 am    Post subject: Reply with quote

Different results using Meostigmat 1.4/70mm & NEX-C3 depending on DOF rules and post-production:




Starring Marky


PostPosted: Wed Sep 10, 2014 10:33 am    Post subject: Reply with quote

I tried my 1.4/70 on my a850 and it just made me think 'if this thing had an aperture it would be a great lens' but it doesn't and the dof on FF is too thin to be useful in 99% of situations, sadly. I have a 20-blade solid brass aperture from an old air ministry lens I mounted in a shutter, but it looks like a hell of a job to chop the Meopta lens in half and fit the aperture. Sad


PostPosted: Tue Sep 16, 2014 7:22 am    Post subject: Reply with quote

iangreenhalgh1 wrote:
I tried my 1.4/70 on my a850 and it just made me think 'if this thing had an aperture it would be a great lens' but it doesn't and the dof on FF is too thin to be useful in 99% of situations, sadly. I have a 20-blade solid brass aperture from an old air ministry lens I mounted in a shutter, but it looks like a hell of a job to chop the Meopta lens in half and fit the aperture. Sad


Dont understand...

why shooting with a 1.4/70mm lens, if you want on the other hand use an aperture with this argument of a thin DOF...

Using an aperture on this lens means, lost of his significant signatur.

So either you are willing to train yourself in working with the Meostigmat or you better have to go for a 85/2.8 lens. Very Happy


PostPosted: Sun Sep 21, 2014 11:15 am    Post subject: Reply with quote

For those of you who are interested in using this meostigmat on mirrorless cams like Fuji X, Canon EOS-M, Sony NEX or A7 i developed a focussing aid for the original Meopta Meostigmat 1.4/70mm !!!

This works very simple:

First, the focussing aid do have a changeable mount.... a 52mm filter reverse ring to your Evil cam will give you the possibility to use this tool on nearly all mirrorless cams.

Sony NEX... and Meostigmat 1.4/70mm



Sony A7... and Meostigmat 1.4/70mm...




Olympus PEN EP-2



and would also work without further modification of the lens on each Fuji X cam, because of same near same register distance.
(but i havent a Fuji on hand)...

Here a picture showing the interchangeable mount...



Yes, you are looking right .... Shocked

After a modification of the 1.4/70mm Meopta lensbody, it will also work on a Canon EOS 5D MKII DSLR cam... !!!!
(and of course on all other EOS cams...)



But not enough with this possibilities, this new focussing aid will open some further interesting ways for the other Meostigmat lenses like Meostigmat 1.0/50mm, Meostigmat 1/70mm on mirrorless Evilcam's...

Meostigmat 1/50mm on Sony E-Mount cams (! This lens covers only APS-C format)...



Meostigmat 1/50mm on Olympus FT cams..




Meostigmat 1/70mm on Sony E-Mount cams... (this lens also covers only APS-C frame !)




Unfortunately this 1/70mm lens cant use on FT cams because of the very small mount... the rear lens needs to intrude some mm into the sensor chamber, but cant because of a rear-lens which is wider ... and cant intrude into the FT mount.

If anyone is interested in the focusing aid for the line of Meostigmat lenses, contact me via Board PN or follow me over to my own board.

www.digicamclub.de

Kindly regards
Henry


PostPosted: Sun Sep 21, 2014 1:34 pm    Post subject: Reply with quote

Nicely done Henry, I have a similar contraption, too - the easiest focusing mount to make but works well Wink

Last edited by kds315* on Sun Sep 21, 2014 8:59 pm; edited 1 time in total


PostPosted: Sun Sep 21, 2014 2:22 pm    Post subject: Reply with quote

Is that a helicoid or just a sliding tube?


PostPosted: Sun Sep 21, 2014 2:46 pm    Post subject: Reply with quote

iangreenhalgh1 wrote:
Is that a helicoid or just a sliding tube?


As far as I understand it, it is a helicoid using metal on one side and velvet on the other. So it doesn't slide, but turn. A clever solution.
I will be able to enjoy this construction soon. I just need to decide which version I order from Henry. Wink


PostPosted: Sun Sep 21, 2014 5:25 pm    Post subject: Reply with quote

iangreenhalgh1 wrote:
Is that a helicoid or just a sliding tube?


This is helicoid like and has on one side a multiple 18 track thread, and as a counterpart a selfcutting velvet, which corresponds to the threads in the alloy body.
Rotating the lens, will move/turns the lens body forward and backwars, just like a normal helicoid, as Carsten described.

Works perfect, smooth from infinity to about 0.3m... and without any tolerances.

Regards
Henry


PostPosted: Sun Sep 21, 2014 5:43 pm    Post subject: Reply with quote

One piece of this helicoid is on the way to our User "buggz" ...
he plans to use it with a shorten Meostigmat on his Canon 5D MKII...

Hope he will report after his unit arrives.

Regards
Henry


PostPosted: Sun Sep 21, 2014 6:19 pm    Post subject: Reply with quote

Interesting idea, I wonder how long the life cycle of the velvet will be Wink


PostPosted: Sun Sep 21, 2014 8:47 pm    Post subject: Reply with quote

kds315* wrote:
Interesting idea, I wonder how long the life cycle of the velvet will be Wink


No problem after nearly 3 days of auto-rotating on a special constructed machine... and if it should be neccessary to replace the velvet in the future, its no problem to tape another stripe of the velvet on the Meopta Meostigmat 1.4/70mm... Very Happy

Simply screw in the new prepaired Meostigmat and enjoy...

Here you can see the velvet counterpart of the prototype... after 3 days of rotating the Meostigmat in the focusing aid...



For me and others, this works perfect... and if it should be necessary sometimes, no problem to replace the velvet after thousends and thousends turns.... replacement can be done by yourself for some cents...

This solution for the line of Meopta Meostigmat lenses is simply clever and easy to understand.

regards
Henry


Last edited by hinnerker on Sun Sep 21, 2014 9:00 pm; edited 1 time in total


PostPosted: Sun Sep 21, 2014 8:50 pm    Post subject: Reply with quote

I tried my 1.4/70 on my a850 today. Held against the mount, it only focuses about 20cm away and I see no way to shorten the tube by much, so it's for mirrorless only. Sad

So, anyone want to buy a Meostigmat 1.4/70 new, used only once briefly, in original case?


PostPosted: Sun Sep 21, 2014 9:16 pm    Post subject: Reply with quote

iangreenhalgh1 wrote:
I tried my 1.4/70 on my a850 today. Held against the mount, it only focuses about 20cm away and I see no way to shorten the tube by much, so it's for mirrorless only. Sad


Wrong statement... as you can see... if you would follow, what people posting here in this thread, you would have read that you can modify the lens to work on a Canon DSLR... and this one has a mirror-box. So its not only for mirrorless cams, only because you dont know how to modify the Meostigmat tubes.



If it fits to a Sony A850 or not depends on the hole diameter of the A-mount, because the rear lens has to intrude in the mirrorbox for some mm and this requires a minimum mount diameter of 47mm.

Sony A-Mount doesnt have this min. diameter as far as i know, so you can say... it works not on my Sony A850, but you cant say in generell, that this is only for mirrorless cams.

So you can simply say, that there are mounts, on which the Meostigmat will work and others on which it wont work.

But to say... its only for mirrorless is simply wrong


Last edited by hinnerker on Sun Sep 21, 2014 10:40 pm; edited 1 time in total


PostPosted: Sun Sep 21, 2014 9:34 pm    Post subject: Reply with quote

No need to be so critical.

Okay, so it will work on an EOS, but it will not work on a Sony DSLR or DSLT.


PostPosted: Mon Sep 22, 2014 1:21 am    Post subject: Reply with quote

Can barely wait!
I also will use the Meostigmat with the VNEX system on my FujiFilm X-E1.


hinnerker wrote:
One piece of this helicoid is on the way to our User "buggz" ...
he plans to use it with a shorten Meostigmat on his Canon 5D MKII...

Hope he will report after his unit arrives.

Regards
Henry


PostPosted: Mon Sep 22, 2014 6:26 am    Post subject: Reply with quote

iangreenhalgh1 wrote:
No need to be so critical.

Okay, so it will work on an EOS, but it will not work on a Sony DSLR or DSLT.


I have modifed my Meopta Meostigmat 70mm/1.4 for Canon EOS with a macro teleconverter helicoid. From what I remember there should be enough room for Sony DSLR too. Have to search for the lens at home.


PostPosted: Mon Sep 22, 2014 7:07 pm    Post subject: Reply with quote

The back lens border at my lens is at infinity about ~1mm bellow the EF flange. It does not protrude inside the camera on EF.
Sony A-mount free mount diameter is about 47mm, lens back housing diameter in my helicoid is 43mm, so there is enough room for the adapter part between this.
Yes, the Meopta Meostigmat 70mm f/1.4 can be converted to Sony A mount - but it is not a pure adaption. There is some machining to do.


Last edited by ZoneV on Mon Sep 22, 2014 7:18 pm; edited 1 time in total


PostPosted: Mon Sep 22, 2014 7:11 pm    Post subject: Reply with quote

How can it be adapted to A mount? The diameter of the lens tube is greater than the mount and the lens only focuses to about 20cm when held against the mount. There isn't much that can be done to shorten the tube.


PostPosted: Mon Sep 22, 2014 7:24 pm    Post subject: Reply with quote

The housing protrudes ~15mm behind the lens, and the actual lens diameter is much smaller than the housing.
My conversion was some months ago, don't remember the details. At the moment some hot glue is involved, probably I open it and make some photos of the parts.


PostPosted: Mon Sep 22, 2014 7:38 pm    Post subject: Reply with quote

The black part of the Meostigmat back has 6 mm. It can be "shaved" to 1 mm. to gain 5 mm. In fact you'll loose ~2 more mm. with the helicoid mount, so your only gain is ~3mm. by "shaving" it. That should be just enough for infinity focus on your camera, I think (if the "unshaven" lens focuses to infinity on EOS). If it doesn't, the adaptation is still possible but one has to re-make the barrel and back group lens thread (lathe) to be able to cut as much as ~1.5 cm. from the lens back.


PostPosted: Mon Sep 22, 2014 8:00 pm    Post subject: Reply with quote

Unshaved on EOS is focus only to ~50cm distance.
It is some work to get a lot of the back tube away (depends on what kind of helicoid to use). And I have worked on the inner lens tube too, to get the diameter as small as I needed. for Sony A mount this is needed too.