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koji
Joined: 21 Jul 2008
Posts: 2108
Location: Hiroshima, Japan
Expire: 2012-12-27
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 Posted: Wed Nov 19, 2008 3:15 pm Post subject: PB->EOS adapter (PB-EF adapter) |
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koji wrote:
You may have seen this adapter at *Bay, here is some more info.
As I said before somewhere else, this adpater does not give you infinity focus for
certain Prakticars, so I shaved the base metal using Dremel (tm). 
The main reason I shaved is to ease mounting genuine CZJ made Prakticars,
they are very hard to mount to this adaptor due to base metal is too thick for
CZJ made Prakticars, whose mechanical standard is much more precise.
Left original, Right metal is shaved for infinity focus and some Prakticars (easier to mount)
Make a canal(?)/dent for 350D's mount base metal for lens stoper mechanism so that you do not have to dismount adapter!!
Final looks like this
With Prakticar 50/1.4 (first type, lens name on the lens barrel)
Ex.1 All are shot at f1.4, close range
Ex.2 This lens is softer than the second model of 50/1.4 at f1.4, but bokeh is much wilder!
Ex.3 @33cm
Ex.4 Focus at the tip of nose
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Our Home Page has 18,200 photos in 575 directories today.
Lenses: https://www.pbase.com/kkawakami/top_level_my_lenses
Last edited by koji on Fri Dec 05, 2008 6:12 pm; edited 1 time in total |
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LucisPictor
Joined: 26 Feb 2007
Posts: 17633
Location: Oberhessen, Germany / Maidstone ('95-'96)
Expire: 2013-12-03
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| Posted: Wed Nov 19, 2008 3:27 pm Post subject: |
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LucisPictor wrote:
 I would only recommend making this "canal" in your cam mount if you only want to use this cam for PB lenses.
Otherwise there can be the danger of light leaks.
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Personal forum activity on pause every now and again (due to job obligations)!
Carsten, former Moderator 
Things ON SALE
Carsten = "KAPCTEH" = "Karusutenu" | T-shirt?.........................My photos from Emilia: http://www.schouler.net/emilia/emilia2011.html
My gear: http://retrocameracs.wordpress.com/ausrustung/
Old list: http://forum.mflenses.com/viewtopic.php?t=65 (Not up-to-date, sorry!) | http://www.lucispictor.de | http://www.alensaweek.wordpress.com |
http://www.retrocamera.de |
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shad309
Joined: 08 Mar 2008
Posts: 453
Location: Illinois, USA
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| Posted: Wed Nov 19, 2008 4:15 pm Post subject: |
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shad309 wrote:
OUCH, not only could be bad for light leaks but also a good way for dust to get in!
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Canon 400D & 350D
Lenses- German, Japanese, & Russian |
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Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
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| Posted: Wed Nov 19, 2008 5:39 pm Post subject: |
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Attila wrote:
Great idea to provide new life for this superb lenses! Thanks for sharing!
_________________
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Items on sale on Ebay
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koji
Joined: 21 Jul 2008
Posts: 2108
Location: Hiroshima, Japan
Expire: 2012-12-27
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| Posted: Wed Nov 19, 2008 6:48 pm Post subject: |
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koji wrote:
People wary too much I think. Light leak, I thought from the beginning,
is pretty weak, and bayonet mount and its "nail" almost stops it. The dust
is not to wary neither, if you are using a zoom lens the camera breaths
much easier. Just kidding.
I did put a piece of sticker backing(ie. self-adhesive) foam into the canal.
You can see the result from my new photo below. I have many of those camera
repair goods. 
(Maybe I should become a camera repair man!  )
Any more problem?
(Yes, yes, I could not sell this cam easily, but I have no intention to do so.)
_________________
Our Home Page has 18,200 photos in 575 directories today.
Lenses: https://www.pbase.com/kkawakami/top_level_my_lenses
Last edited by koji on Fri Dec 05, 2008 2:12 pm; edited 2 times in total |
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Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
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| Posted: Wed Nov 19, 2008 7:03 pm Post subject: |
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Attila wrote:
_________________
-------------------------------
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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n6mod
Joined: 20 Oct 2008
Posts: 134
Location: Boulder Creek, CA, USA
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| Posted: Sun Nov 30, 2008 4:40 pm Post subject: |
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n6mod wrote:
Koji,
I'm surprised you went this route, given the envy with which I've eyed your PB-converted EOS.
Any interest in selling that modified bayonet?
-Zandr |
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yalcinaydin
Joined: 20 May 2008
Posts: 825
Location: Izmir, Turkey
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| Posted: Fri Dec 05, 2008 7:16 am Post subject: |
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yalcinaydin wrote:
It looks like this will be my next project after Rollei adapter 
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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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koji
Joined: 21 Jul 2008
Posts: 2108
Location: Hiroshima, Japan
Expire: 2012-12-27
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| Posted: Fri Dec 05, 2008 2:19 pm Post subject: |
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koji wrote:
n6mod, there is no chance right now to get this modified adaptor!
Yalçın, I might love much more "tinkering" than photography.
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n6mod
Joined: 20 Oct 2008
Posts: 134
Location: Boulder Creek, CA, USA
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| Posted: Fri Dec 05, 2008 4:47 pm Post subject: |
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n6mod wrote:
| koji wrote: |
| n6mod, there is no chance right now to get this modified adaptor! |
Actually, I was wondering if you were interested in parting with your previous approach, the PB-EF mount shown [url]here[/url].
I'm actually quite happy with my SR-mount 20D, so doing that again for PB is appealing. I'll keep looking for a donor B-series camera in the mean time.
Since you lucked out on all the thicknesses there, can you tell me which camera donated the mount? If I have to start shaving the mount and keep it flat, we've probably exceeded my tools and (more importantly) abilities.
-Zandr |
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koji
Joined: 21 Jul 2008
Posts: 2108
Location: Hiroshima, Japan
Expire: 2012-12-27
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| Posted: Fri Dec 05, 2008 5:08 pm Post subject: |
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koji wrote:
Hi, all the PRAKTICA (i mean PB-mount) camera have the identical mount
base metal, as far as I observed so far. Mine came from a broken BX-20,
also one more from B200 I bought many years ago, this nice camera died
after many useful days.
Anyway, any one is alright to me. This base metal has 2mm (exact) thick,
which is exactly the depth of bayonet nail from the mount surface of EF-
mount metal. So as you know PB-mount is sitting on the three nails of
EF-mount roughly speaking. Conveniently it makes the combined mount
has 44.4mm flange distance, which is the exactly Praktica bayonet flange
distance. That's was a sire luck.
I still have the old "Praktica mount" for EOS_350D, however the most of
Prakticars will cause a trouble for FF EOS cameras including film EOSs.
There is one more problem of the combined mount, it cannot have lens
mount stopper to secure the lens from dropping from the mount. This is
the most annoying part for me, so I was looking for a new PB->EF adaptor.
Luckily there is one available these days, it looks like old PB->FD adaptor,
I guess that the creator of this new adaptor leant very well about that old one.
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n6mod
Joined: 20 Oct 2008
Posts: 134
Location: Boulder Creek, CA, USA
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| Posted: Fri Dec 05, 2008 6:16 pm Post subject: |
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n6mod wrote:
| koji wrote: |
Hi, all the PRAKTICA (i mean PB-mount) camera have the identical mount
base metal, as far as I observed so far. |
Great, thanks. I'll keep watching for a dead camera, then.
| Quote: |
There is one more problem of the combined mount, it cannot have lens
mount stopper to secure the lens from dropping from the mount. This is
the most annoying part for me, so I was looking for a new PB->EF adaptor.
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I know you had the same complaint with the Italian guy's Minolta mount, but it hasn't bothered me on mine.
| Quote: |
Luckily there is one available these days, it looks like old PB->FD adaptor,
I guess that the creator of this new adaptor leant very well about that old one. |
Got a link? The only one I can find is the one you had to dremel out at the top of this thread. I have the same infinity focus issues with the CZJ 50/1.4 (first version).
Thanks again!
-Zandr |
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koji
Joined: 21 Jul 2008
Posts: 2108
Location: Hiroshima, Japan
Expire: 2012-12-27
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| Posted: Fri Dec 05, 2008 7:07 pm Post subject: |
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koji wrote:
Look for ePay name "ciecio7", who is still selling this new adaptor.
Normal starting price is GBP 20.
The other PB->FD adaptor also was found on ePay, but it is
very rare item nowadays. I do not remember the name of
the seller of this oldish adaptor.
My concern for "lens stopper" is that I normally carry camera+lens
from my neck, I seldom use a camera bag unless going to a trip.
I do not wish to destroy some of Prakticars, which are very rare,
and was extremely, as CZJ'a lens goes, expensive.
I am responsive to keep those Prakticars as much as their original
shape as a Prakticar collector. Serious.
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n6mod
Joined: 20 Oct 2008
Posts: 134
Location: Boulder Creek, CA, USA
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| Posted: Fri Dec 05, 2008 7:14 pm Post subject: |
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n6mod wrote:
| koji wrote: |
Look for ePay name "ciecio7", who is still selling this new adaptor.
Normal starting price is GBP 20.
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Interesting, this looks much like the adapter I have (got from eBay seller funkykoval2001 with the 50/1.4 CZJ), and he says "infinity focusing not guaranteed". Were you able to get infinity focus with your 50/1.4, or is this the adapter you modified?
| koji wrote: |
My concern for "lens stopper" is that I normally carry camera+lens
from my neck, I seldom use a camera bag unless going to a trip. |
Ah, that the difference. I generally dislike neck/shoulder straps, and tend to use a Slingshot, so the camera is secure in a bag or in my hands. |
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koji
Joined: 21 Jul 2008
Posts: 2108
Location: Hiroshima, Japan
Expire: 2012-12-27
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| Posted: Fri Dec 05, 2008 7:35 pm Post subject: |
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koji wrote:
"ciecio7" says "infinity focus is guaranteed", I was skeptical but bid it.
Some Prakticars can achieve an infinity focus, but the rest (although have
not tested all) did not achieve as it is. As I mentioned in the original post,
it is hard to mount genuine CZJ made Prakticars, so I shaved and got
infinity focus too for example the both 50/1.4s.
The base metal is about 0.14~0.20 mm too thick to achieve infinity focus
on EOS camera. My shaved adaptor is still a tad too thick, but some
lenses become too loose, such as 80/1.8 and Penatcon made 135/2.8.
After shaving my EOS-5D's mirror, I will finally show how good those
Prakticars are in "MFlenses".
(I hate shaving everyday, but don't mind it on camera or adaptors. )
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Lenses: https://www.pbase.com/kkawakami/top_level_my_lenses
Last edited by koji on Sat Dec 27, 2008 9:47 pm; edited 1 time in total |
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hk300
Joined: 30 Oct 2008
Posts: 1041
Location: Hong Kong
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| Posted: Sat Dec 20, 2008 12:45 pm Post subject: |
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hk300 wrote:
thanks for sharing your projects. |
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Schnauzer
Joined: 09 Apr 2008
Posts: 2155
Location: Maine, USA
Expire: 2012-03-08
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| Posted: Sat Dec 20, 2008 2:53 pm Post subject: |
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Schnauzer wrote:
I have a watch that doesn't tell time anymore, do you think you could fix it for me? LOL.
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hk300
Joined: 30 Oct 2008
Posts: 1041
Location: Hong Kong
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| Posted: Sat Jan 10, 2009 4:52 am Post subject: |
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hk300 wrote:
@ Koji
Any more feedback on the PB to EOS adapters?
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No longer member , please don't try to contact to him |
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koji
Joined: 21 Jul 2008
Posts: 2108
Location: Hiroshima, Japan
Expire: 2012-12-27
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| Posted: Sat Jan 10, 2009 5:15 pm Post subject: |
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koji wrote:
@HK300
Sorry, I have no more things to say about PB->EF adapter.
When I have more to say, will come back in here.
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Lenses: https://www.pbase.com/kkawakami/top_level_my_lenses |
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mxpx22
Joined: 21 May 2012
Posts: 1
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| Posted: Mon May 21, 2012 11:13 am Post subject: |
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mxpx22 wrote:
Hi guys, I was kind of sad due to the lack of easily achievable infinity focus with PB mount lenses on canon EOS.
I have one mechanical adapter but it cant achieve infinity focus. I have done one video exercise where I used my Prakticar 2.8 / 135 and Canon 1.8 / 50.
Some time a ago I found blog of this guy but I am bit confused about this upgrade.
Can anyone look at this and maybe bring more light to this update and if it is possible to get infinity focus after doing so. Thanks.
Martin. |
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Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
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| Posted: Mon May 21, 2012 5:13 pm Post subject: |
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Attila wrote:
Welcome Martin!
To make PB adapter to EOS not easy if looks okay with maker lens, that is very possible will not works with other lenses, due need to make it very thin.
Solution is either use more compatible camera like all mirror less or match adapter with actual lens if possible by an expert.
_________________
-------------------------------
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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les24preludes
Joined: 27 Nov 2012
Posts: 11
Location: United Kingdom
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| Posted: Sat Dec 08, 2012 12:07 pm Post subject: |
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les24preludes wrote:
I got this adapter for PB-EOS on ebay from ynaan - waiting for it.
http://www.ebay.co.uk/itm/400335355365?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
Has anybody tried it? I have a CZJ 28/2.8 and hoping I can get infinity focus on my EOS.
Or otherwise, what has worked for anyone else with PB-EOS? I realise we need to get creative here! |
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keithcanisius
Joined: 29 Dec 2014
Posts: 29
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| Posted: Wed Jan 07, 2015 6:53 pm Post subject: |
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keithcanisius wrote:
http://pages.ebay.com/link/?nav=item.view&alt=web&id=121096572685
This one sounds good?
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