[FS: General] PORST Color Reflex MC 55mm f1.2 lens modified for 5dmkII or EOS decklicked

kostas

Well-known member
Up for sale is a very fast PORST Color Reflex MC 55mm f1.2 lens. SOLD SOLD SOLD
To my knowledge this lens was made by Cosina in Japan using the Tomioka lens design.
Original mount is Pentax PK, but it has been modified to mount on the 5d markII without mirror interference as follows:
1) aperture declicked (continuous aperture variation from f1.2 to f22 like a preset lens)
2) protruding parts on the back of the lens have been removed.
3) PK to EOS adapter has been fitted (infinity focus ok)
Comes with generic front cap and EOS rear cap.
Early serial number 0000975.
Smooth focus and aperture, clean glass, usual external bodywear, 55mm filter thread.
Asking price is 220 Eur shipped to worldwide (priority, signed for). (was 240)SOLD SOLD SOLD.
 
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Pictures of the lens.
 

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Pictures shot with the lens.
Apertures are respectively
F1.2, F5.6
F1.2, F2.8
 

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I have had some questions regarding the lens.
The PK to EOS adapter is a good quality adapter.
I have owned others with some amount of play. This one is pretty tight, so I haven't noticed any play.
There is no problem with the mirror of the 5d even at infinity.
On the 5dmkII the lens focuses at infinity and maybe slightly past infinity.
Close focus distance is 50cm.
Eight aperture blades.
Needless to say that it can be mounted on crop sensor Canon DSLRs too.
I guess that mounting to Panasonic micro four thirds or SONY would not be an issue either with corresponding adapters from Pentax PK.
So it is widely adaptable, but EOS ready.
 
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