PB->EOS adapter (PB-EF adapter)

[koji]

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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Lenses: http://www.pbase.com/kkawakami/my_lenses
Cameras: http://www.pbase.com/kkawakami/my_cameras

[LucisPictor]

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.
_________________
Carsten, Moderator
Things ON SALE
Carsten = "KAPCTEH" = "Karusutenu" | T-shirt?.........................My photos from Emilia: http://tinyurl.com/6czngr4
Sets:
Sony NEX-7 / NEX-3 - Tamron 2.5/24, Pentax-110 2.8 (18/24/50/70), Fujian CCTV 1.7/35, PEN Zuiko 1.8/38, Hexanon 1.8/40 & 1.4/57, Rokkor 3.5/28 & 2/45, Jupiter3 1.5/50, Schneider-Kreuznach Tele-Xenar 3.8/75, Leica Hektor 4.5/135, Sony SEL 2.8/16 & 18-55 OSS & 55-210 OSS, Sigma EX 2.8/30
Canon EOS 5D - Zenitar 2.8/16, Rokkor 2/28, Summicron-R 2.0/50, Nikkor-SC 1.2/55, Nikkor 1.8/85, Tamron 2.5/135, Elmar 4/180, Tamron 8/500, Tamron 2.8-3.8/35-80, Sigma EX 15-30, Tokina AT-X Pro 28-70
Canon EOS 40D - Sigma 1.8/24, Canon EF 1.8/50, Tokina AT-X Pro 24-200 (EOS)
Canon EOS 300D - Steinheil 2.8/35, Zuiko 1.4/50, Helios-44 2/58, Jupiter-9 2/85, Vivitar S1 2.3/135, Tokina 4/28-85
Nikon D1 - Tamron 2.5/28, MIR 2/35, Jupiter-37 3.5/135, Soligor 4-5.6/60-300, Soligor 3.5/70-220, Tokina AT-X Pro 24-200
Pentax K100D - Pentax 2.8/28, Pentax-M 1.7/50, Rikenon 3.4-4.5/35-70
Sigma SD9 - CZJ Flek 4/20, Vivitar 2.8/28, Tamron 3.5/35-70, Industar 3.5/5cm
Nikon F - Nikkor 2.8/24, Nikkor-SC 1.4/50
Asahi Spotmatic SPII, Mamiya 1.8/55
EXA Varex - CZJ Biogon 2/58
Zorki-4 - Jupiter 2.8/35, Jupiter8 2/50
Leica IIIa syn - Leica Summitar 2/5cm, Leica Elmar 4/90

Leica C2, Minox 35 GL,Yashica Electro 35 GS, Kodak Retina Ia, Agfa Super Silette, Vivitar Ultra Wide & Slim, Adox Golf 66 and some others...
Sigma DP1s, Leica Digilux 2, Lumix LC-5 & FX37, Lumix FZ20, Canon G2, Sony Mavica 300, Fuji 4800Z + 4900Z, Oly C3030, Pentax Optio S, Nikon CP950, Sony V1 & F505 a.s.m.
Old list: http://forum.mflenses.com/viewtopic.php?t=65 (Not up-to-date, sorry!) | http://lucispictor.weebly.com | http://www.alensaweek.wordpress.com
On sale: Vivitar 2.8-3.8/35-70

[shad309]

OUCH, not only could be bad for light leaks but also a good way for dust to get in!
_________________
Canon 400D & 350D
Lenses- German, Japanese, & Russian

[Attila]

Great idea to provide new life for this superb lenses! Thanks for sharing!
_________________
Attila - admin
Items on sale on Ebay


35mm: Konica A4, Konica IIIA, Konica FC-1
MF: Konica Pearl I,II,III 6x4,5 Konica Semi Pearl
Film: Foma,Kodak, Fuji DIY development C41, FOMA LQR
Scan: Epson V500, scanassist (http://www.scanassist.org)
Shutter tester: LCD tester from member vfmoto
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Lenses: Konica Hexanons,Carl Zeiss,Carl Zeiss Jena,Meyer-Optik,Minolta MD,Yashica ML,Nikon,Olympus OM
DIY E-6,C41 and B&W

[koji]

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.)
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My Hone Page has 7,260 photos in 393 directories today.
Lenses: http://www.pbase.com/kkawakami/my_lenses
Cameras: http://www.pbase.com/kkawakami/my_cameras

[Attila]

_________________
Attila - admin
Items on sale on Ebay


35mm: Konica A4, Konica IIIA, Konica FC-1
MF: Konica Pearl I,II,III 6x4,5 Konica Semi Pearl
Film: Foma,Kodak, Fuji DIY development C41, FOMA LQR
Scan: Epson V500, scanassist (http://www.scanassist.org)
Shutter tester: LCD tester from member vfmoto
Digital: Panasonic G1, Sony Nex-3, Samsung NX100
Lenses: Konica Hexanons,Carl Zeiss,Carl Zeiss Jena,Meyer-Optik,Minolta MD,Yashica ML,Nikon,Olympus OM
DIY E-6,C41 and B&W

[n6mod]

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

[yalcinaydin]

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

[koji]

n6mod, there is no chance right now to get this modified adaptor!

Yalçın, I might love much more "tinkering" than photography.
_________________
My Hone Page has 7,260 photos in 393 directories today.
Lenses: http://www.pbase.com/kkawakami/my_lenses
Cameras: http://www.pbase.com/kkawakami/my_cameras

[n6mod]

[koji]

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.
_________________
My Hone Page has 7,260 photos in 393 directories today.
Lenses: http://www.pbase.com/kkawakami/my_lenses
Cameras: http://www.pbase.com/kkawakami/my_cameras

[n6mod]

[koji]

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.
_________________
My Hone Page has 7,260 photos in 393 directories today.
Lenses: http://www.pbase.com/kkawakami/my_lenses
Cameras: http://www.pbase.com/kkawakami/my_cameras

[n6mod]

[koji]

"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. )
_________________
My Hone Page has 7,260 photos in 393 directories today.
Lenses: http://www.pbase.com/kkawakami/my_lenses
Cameras: http://www.pbase.com/kkawakami/my_cameras