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hk300
Joined: 30 Oct 2008 Posts: 1041 Location: Hong Kong
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Posted: Thu Feb 26, 2009 4:27 pm Post subject: Update on Mflenses adapter for Praktica PB-mount on EOS |
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hk300 wrote:
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Price for the Praktica/PB to EOS/EF adapter:
USD40 each
Shipping: USD3
+ 3% paypal charges
This price seems a bit higher than most common adapters, but this is since the adapter is fully CNC'd to achieve the highest precision.
Note ... this adapter can achieve infinite focus.
Go out and buy the lower priced PB lenses
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Some of you alreay know that i have been working on a PB to EOS adapter.
In the meantime i also found out that occasionally there are appearing some other PB-to- EOS adapters on Ebay.
I bought one of these adapters and compared this one with the one mflenses will be suplying soon.
Note that the Mflenses version is made on highly accurate CNC machines!
This is the camera body side, there is not much to see.
Note that the mflenses version is showing its brass material.
We considered to plate the internals, but since plating will add a certain thickness to the material, we decided not to do it.
The adapter has to be very very thin in order to achieve infitnite focus.
Thickness comparison
(inside of the flange)
Ebay Vendor A vs MFLenses
1.28mm 0.90mm
Difference is 0.38mm!!!!
Infinite focus
(tested using the PEntacon 135/2.
Ebay Vendor A vs MFLenses
No Yes _________________ No longer member , please don't try to contact to him
Last edited by hk300 on Wed Mar 04, 2009 10:17 am; edited 3 times in total |
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hk300
Joined: 30 Oct 2008 Posts: 1041 Location: Hong Kong
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Posted: Thu Feb 26, 2009 4:32 pm Post subject: sample pics |
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hk300 wrote:
Samples made with Pentacon 135/2.8
Subject about 200 ~ 300m
Ebay Vendor A adapter ... max distance, conclusion, cannot do infinite focus
Mflenses adapter ... can do infinite focus
sorry for the crappy pics _________________ No longer member , please don't try to contact to him |
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Attila
Joined: 24 Feb 2007 Posts: 57840 Location: Hungary
Expire: 2021-11-18
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Posted: Thu Feb 26, 2009 4:49 pm Post subject: |
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Attila wrote:
Thank you Alex! This is vital information! _________________ -------------------------------
Items on sale on Ebay
Sony NEX-7 Carl Zeiss Planar 85mm f1.4, Minolta MD 35mm f1.8, Konica 135mm f2.5, Minolta MD 50mm f1.2, Minolta MD 250mm f5.6, Carl Zeiss Sonnar 180mm f2.8
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Orio
Joined: 24 Feb 2007 Posts: 29545 Location: West Emilia
Expire: 2012-12-04
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Posted: Thu Feb 26, 2009 4:50 pm Post subject: |
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Orio wrote:
congratulations, you did really a great work! _________________ Orio, Administrator
T*
NE CEDE MALIS AUDENTIOR ITO
Ferrania film is reborn! http://www.filmferrania.it/
Support the Ornano film chemicals company and help them survive!
http://forum.mflenses.com/ornano-chemical-products-t55525.html |
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F16SUNSHINE
Joined: 20 Aug 2007 Posts: 5486 Location: Left Coast
Expire: 2011-11-18
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Posted: Thu Feb 26, 2009 5:11 pm Post subject: |
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F16SUNSHINE wrote:
_________________ Moderator |
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koji
Joined: 21 Jul 2008 Posts: 2106 Location: Hiroshima, Japan
Expire: 2012-12-27
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Posted: Thu Feb 26, 2009 5:13 pm Post subject: |
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koji wrote:
It looks good, Alex. How do you stop the lens in the position? _________________ Our Home Page has 18,200 photos in 575 directories today.
Lenses: https://www.pbase.com/kkawakami/top_level_my_lenses |
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hk300
Joined: 30 Oct 2008 Posts: 1041 Location: Hong Kong
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Posted: Thu Feb 26, 2009 5:17 pm Post subject: |
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hk300 wrote:
koji wrote: |
It looks good, Alex. How do you stop the lens in the position? |
stop ... as in how to lock the lens?
There is a hole in the adapter, in which one of the 3 PB electronic contact points will get locked. ... if you understand what i mean ...
I will try to make a pic tomorrow. _________________ No longer member , please don't try to contact to him |
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koji
Joined: 21 Jul 2008 Posts: 2106 Location: Hiroshima, Japan
Expire: 2012-12-27
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Posted: Thu Feb 26, 2009 5:28 pm Post subject: |
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koji wrote:
Ok, I got it. Something similar happens when the CZJ "electric" lens is
mounted to one of EF adapters. _________________ Our Home Page has 18,200 photos in 575 directories today.
Lenses: https://www.pbase.com/kkawakami/top_level_my_lenses |
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lahnet
Joined: 10 Apr 2007 Posts: 1164 Location: Denmark
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Posted: Thu Feb 26, 2009 6:03 pm Post subject: |
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lahnet wrote:
Great work.
When will it be possible to order? _________________ Henrik
Lahnet-Foto
My FLICKR
Gear list |
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patrickh
Joined: 23 Aug 2007 Posts: 8551 Location: Oregon
Expire: 2011-11-18
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Posted: Thu Feb 26, 2009 7:02 pm Post subject: |
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patrickh wrote:
Fantastic Alex
patrickh _________________ DSLR: Nikon D300 Nikon D200 Nex 5N
MF Zooms: Kiron 28-85/3.5, 28-105/3.2, 75-150/3.5, Nikkor 50-135/3.5 AIS // MF Primes: Nikkor 20/4 AI, 24/2 AI, 28/2 AI, 28/2.8 AIS, 28/3.5 AI, 35/1.4 AIS, 35/2 AIS, 35/2.8 PC, 45/2.8 P, 50/1.4 AIS, 50/1.8 AIS, 50/2 AI, 55/2.8 AIS micro, 55/3.5 AI micro, 85/2 AI, 100/2,8 E, 105/1,8 AIS, 105/2,5 AIS, 135/2 AIS, 135/2.8 AIS, 200/4 AI, 200/4 AIS micro, 300/4.5 AI, 300/4.5 AI ED, Arsat 50/1.4, Kiron 28/2, Vivitar 28/2.5, Panagor 135/2.8, Tamron 28/2.5, Tamron 90/2.5 macro, Vivitar 90/2.5 macro (Tokina) Voigtlander 90/3.5 Vivitar 105/2.5 macro (Kiron) Kaleinar 100/2.8 AI Tamron 135/2.5, Vivitar 135/2.8CF, 200/3.5, Tokina 400/5,6
M42: Vivitar 28/2.5, Tamron 28/2.5, Formula5 28/2.8, Mamiya 28/2.8, Pentacon 29/2.8, Flektogon 35/2.4, Flektogon 35/2.8, Takumar 35/3.5, Curtagon 35/4, Takumar 50/1.4, Volna-6 50/2.8 macro, Mamiya 50/1.4, CZJ Pancolar 50/1,8, Oreston 50/1.8, Takumar 50/2, Industar 50/3.5, Sears 55/1.4, Helios 58/2, Jupiter 85/2, Helios 85/1.5, Takumar 105/2.8, Steinheil macro 105/4.5, Tamron 135/2.5, Jupiter 135/4, CZ 135/4, Steinheil Culminar 135/4,5, Jupiter 135/3.5, Takumar 135/3.5, Tair 135/2.8, Pentacon 135/2.8, CZ 135/2.8, Taika 135/3.5, Takumar 150/4, Jupiter 200/4, Takumar 200/4
Exakta: Topcon 100/2.8(M42), 35/2.8, 58/1.8, 135/2.8, 135/2.8 (M42), Kyoei Acall 135/3.5
C/Y: Yashica 28/2.8, 50/1.7, 135/2.8, Zeiss Planar 50/1.4, Distagon 25/2.8
Hexanon: 28/3.5, 35/2.8, 40/1.8, 50/1.7, 52/1.8, 135/3.2, 135/3.5, 35-70/3.5, 200/3.5
P6 : Mir 38 65/3.5, Biometar 80/2.8, Kaleinar 150/2.8, Sonnar 180/2.8
Minolta SR: 28/2.8, 28/3.5, 35/2.8, 45/2, 50/2, 58/1.4, 50/1.7, 135/2.8, 200/3.5
RF: Industar 53/2.8, Jupiter 8 50/2
Enlarg: Rodagon 50/5,6, 80/5,6, 105/5.6, Vario 44-52/4, 150/5.6 180/5.6 El Nikkor 50/2,8,63/2.8,75/4, 80/5,6, 105/5.6, 135/5.6 Schneider 60/5.6, 80/5.6, 80/4S,100/5.6S,105/5.6,135/5.6, 135/5.6S, 150/5.6S, Leica 95/4 |
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lahnet
Joined: 10 Apr 2007 Posts: 1164 Location: Denmark
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Posted: Thu Feb 26, 2009 7:07 pm Post subject: |
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lahnet wrote:
Guess it would make sense to start buying some B mount lenses, before these adapters will be know to the "common people" _________________ Henrik
Lahnet-Foto
My FLICKR
Gear list |
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Torsten
Joined: 26 Feb 2009 Posts: 3 Location: Berlin
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Posted: Thu Feb 26, 2009 8:27 pm Post subject: |
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Torsten wrote:
Very good work, I have just now one with AF-chip bought.
Does the AF-chip pass the aperture stick, while lens will be mounted?
But which I am to do with the old adapters, that I purchased directly in Poland? - see www.praktica-b.org _________________ Torsten
Canon EOS 450D, Praktica BX20S, some old lenses |
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Attila
Joined: 24 Feb 2007 Posts: 57840 Location: Hungary
Expire: 2021-11-18
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Posted: Thu Feb 26, 2009 9:10 pm Post subject: |
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Attila wrote:
Torsten wrote: |
Very good work, I have just now one with AF-chip bought.
Does the AF-chip pass the aperture stick, while lens will be mounted?
But which I am to do with the old adapters, that I purchased directly in Poland? - see www.praktica-b.org |
Welcome Torsten! _________________ -------------------------------
Items on sale on Ebay
Sony NEX-7 Carl Zeiss Planar 85mm f1.4, Minolta MD 35mm f1.8, Konica 135mm f2.5, Minolta MD 50mm f1.2, Minolta MD 250mm f5.6, Carl Zeiss Sonnar 180mm f2.8
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hk300
Joined: 30 Oct 2008 Posts: 1041 Location: Hong Kong
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Posted: Fri Feb 27, 2009 2:09 am Post subject: |
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hk300 wrote:
Torsten wrote: |
But which I am to do with the old adapters, that I purchased directly in Poland? - see www.praktica-b.org |
Try to sell it asap!
BTW ... your Polish adapter ... can it do infinite focus? _________________ No longer member , please don't try to contact to him |
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hk300
Joined: 30 Oct 2008 Posts: 1041 Location: Hong Kong
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Posted: Fri Feb 27, 2009 7:31 am Post subject: |
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hk300 wrote:
koji wrote: |
It looks good, Alex. How do you stop the lens in the position? |
do you see the locking pin? _________________ No longer member , please don't try to contact to him |
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hk300
Joined: 30 Oct 2008 Posts: 1041 Location: Hong Kong
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Posted: Fri Feb 27, 2009 7:33 am Post subject: |
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hk300 wrote:
koji wrote: |
Ok, I got it. Something similar happens when the CZJ "electric" lens is
mounted to one of EF adapters. |
Yes ... i had that problem when using the CZJ 20 /2.8 ... it has 3 ... THREE ... pins ... and the M42 adapter had holes exactly at those positions ...
It took me a lot of effort to remove the adapter _________________ No longer member , please don't try to contact to him |
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Torsten
Joined: 26 Feb 2009 Posts: 3 Location: Berlin
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Posted: Fri Feb 27, 2009 10:43 am Post subject: Polish Adapter to thick |
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Torsten wrote:
> BTW ... your Polish adapter ... can it do infinite focus
No, my polish adapter could not do that at open aperture and for that it is to expensive. Its thickness was between 0.6 and 0.65 mm.
Lens 1.4/50 and 1,8/80 could do focus up to 6...8 m.
Lens 2.8/20 was usable starting with aperture 4.
I had to use the same procedure, as Koji, in order to reach 0.45 mm. We called him but the supplier has obviously different conceptions over quality than its customers.
We wrote an article about it in www.praktica-b.org - at moment in German only. _________________ Torsten
Canon EOS 450D, Praktica BX20S, some old lenses |
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yalcinaydin
Joined: 20 May 2008 Posts: 825 Location: Izmir, Turkey
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Posted: Fri Feb 27, 2009 3:04 pm Post subject: |
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yalcinaydin wrote:
hk300 wrote: |
...CZJ 20 /2.8 ... |
So it has arrived
Alex, I want the first adapter and as I will use it on the same lens as your CZJ I'm very comfortable about its performance _________________ My name is "Yalcin", and exactly "Yalçın" and here you can find my MF samples:
http://www.flickr.com/photos/yalcinaydin/sets/
Right now switching back to AF because of work needs but I still love the MF lenses |
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hk300
Joined: 30 Oct 2008 Posts: 1041 Location: Hong Kong
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Posted: Wed Mar 04, 2009 3:34 pm Post subject: |
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hk300 wrote:
Yes ... i will receive the first batch this weekend.
Prices are in the following thread.
http://forum.mflenses.com/finally-for-sale-pb-praktica-to-eos-ef-adapters-t15053.html _________________ No longer member , please don't try to contact to him |
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A G Photography
Joined: 11 May 2008 Posts: 1480 Location: Bologna - Italy
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Posted: Tue Mar 10, 2009 6:52 pm Post subject: |
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A G Photography wrote:
I just used one adapter with the Praktica 28/2.8 and EOS 50 (film) and I couldn't use it even at the closest focus because the rear of the lens did hit the mirror. I'm curious if you tested the adapter with that kind of lens as I suppose it's a lens problem with protuding back than no adapter could solve... but I hope in miracles _________________ Alessandro
My Photography Website
My Blog about Photography and Italian Cuisine
My Photostream on Flickr
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DSLR: Nikon d80, Olympus e410
SLR: Chinon CX, Fujica ST605n, Nikon f601, Pentacon FM, Pentax Spotmatic SPII, Praktica FX, Praktica FX2, Voigtlander VST1, Yashica FX-3, Zeiss Contaflex
RF: Altissa Altix, Zorki Ie, Kiev 4b
Medium Format: Pentacon Six TL, Zeiss Ikonta 520/2, Mockba 4, Voigtlander Bessa I, Agfa Isolette II, Agfa Isola
Large Format: Cambo SC 4x5, Rodenstock Sinaron 150/5.6, Rodenstock Rodagon 150/5.6, Schneider Kreuznach Symmar 180/5.6
Lenses
Nikkors: 28/3.5 AIS, 35/2, 50/1.8, 50/2 H, Micro 55/3.5, Micro 60/2.8, 85/1.8, 135/3.5 AI, 200/4 NAI, 18-55/3.5-5.6, 28-80/3.5-5.6, 55-200/4-5.6
CY: Distagon 28/2.8, Planar 50/1.4, Yashika 50/1.7, Sonnar 135/2.8
CZJ m42-Exakta: Flektogon 20/4, Flektogon 35/2.8, Tessar 40/4.5, Tessar 50/2.8, Pancolar 50/1.8, Pancolar 50/2, Biotar 58/2, Biotar 75/1.5, Tessar 80/2.8, Sonnar 135/3.5, Sonnar 135/4, Triotar 135/4
CZJ P6: Flektogon 50/4, Flektogon 65/2.8, Biometar 80/2.8, Biometar 120/2.8, Sonnar 180/2.8
Meyer-Pentacon: Orestegon 29/2.8, Pentacon 29/2.8, Lydith 30/3.5, Primagon 35/4.5, Helioplan 40/4.5, Domiplan 50/2.8, Primotar 50/3.5, Oreston 50/1.8, Primoplan 58/1.9, Orestor 100/2.8, Trioplan 100/2.8, Helioplan 135/4.5, Orestor 135/2.8, Pentacon 135/2.8, Primotar 135/3.5, Primotar 180/3.5, Telemegor 180/5.5, Orestegor 200/4, Pentacon 200/4, Orestegor 300/4, Telemegor 300/4.5, Telemegor 400/5.5
Schneider-Kreuznach: Curtagon 28/4, Curtagon 35/2.8, Xenon 50/1.9, Xenar 50/2.8, Tele Xenar 135/3.5, Tele Xenar 200/4
Russians: Arsat Zodiak 30/3.5, Mir-I 37/2.8, Volna-9 50/2.8, Industar-50 50/3.5, Industar-61 50/2.8, Helios 44 58/2, Helios 44-2 58/2, Helios 44-M-4 58/2, Volna-3 80/2.8, Helios 40 85/1.5, Jupiter 9 85/2, Jupiter 11 135/4
Others: Chinon-Tomioka 55/1.4, Helios 28/2.8, Isco Iscotar 50/2.8, Konica Hexanon 40/1.8, Ludwig Meritar 50/2.9, Schacht Travegon 35/3.5, Schacht Travenon 135/4.5, Sekor 55/1.8, Sigma MF 28/2.8, S-Takumar, 28/3.5, S-Takumar 50/1.4, S-Takumar 55/1.8, S-Takumar 55/2, Steinheil Quinar 135/2.8, Steinheil Culminar 135/4.5, Vivitar 135/2.8, Voigtlander Ultron 50/1.8, Yashica Yashinon DX 50/1.4, Zuiko MC Auto-W 28/2.8
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Torsten
Joined: 26 Feb 2009 Posts: 3 Location: Berlin
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Posted: Tue Mar 10, 2009 9:53 pm Post subject: full format mirror |
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Torsten wrote:
The minimum distance of mirror from the bayonet is about 16 mm at bottom and 9 mm at top in the original Praktica BX cameras.
At the back end of lens is a ring from plastic, that is mounted with two screws. The distance is 8 mm (9 mm near aperture stick) from bayonet inside the camera.
I heard that one must remove this ring and aperture stick from the lens with FF EOS cameras. The aperture stick ist mounted with two screws. Mark the position of stick on the aperture mechanism before you remove it, if you want to fit it later. _________________ Torsten
Canon EOS 450D, Praktica BX20S, some old lenses |
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