Win a Pentax Limited Lens: Raffle Now Live!

**Porga** · 10-30-2011, 09:09 AM

Originally posted by mclarenman01

Epic shot Porga! I love the colours!

Originally posted by Deimos

Great shots Porga!

Originally posted by the swede

Wow Porga, love the last two shots (keys and dog). Exellent!

Thank you guys!

Laurentiu Cristofor · 10-30-2011, 07:25 PM

A few from yesterday - full set, including B&W and color versions, is here:

**Porga** · 11-06-2011, 12:12 PM

Revuenon 55mm
K-5

axl · 11-11-2011, 05:37 AM

Looks like I'll be back soon!
Just landed myself K50/1.2 just need to see if'll be able to MF it

**Deimos** · 11-11-2011, 06:05 AM

Originally posted by axl

Looks like I'll be back soon!
Just landed myself K50/1.2 just need to see if'll be able to MF it

Live View is your friend!

axl · 11-11-2011, 08:53 AM

Originally posted by Deimos

Live View is your friend!

I hate LV...
But we'll see

**Deimos** · 11-11-2011, 01:51 PM

Originally posted by axl

I hate LV...
But we'll see

Wait until you try focusing a 1.2 lens with the OVF!

LV is a revelation for this. Much easier to nail focus AND you can see what the bokeh looks like while you compose

That said its pretty much the only time I use LV

**Pepe Guitarra** · 11-11-2011, 03:13 PM

I need some advice: I purchased a Porst 55/1.2 from Ebay Germany and did not understand what the add said, this is about 3 months ago. It turned out that the lens is a PK mount, but it was reworked so that it only shoots in f1.2. It cannot be stopped down, so it works in Av mode in my K5 and Kx. I have taken some nice creative photos at f1.2. However, I would like to be able to stop the lens down and get some more usage from it. Does anyone know how to revert this operation? Does anyone have a Porst design? Thanks, Pepe

Laurentiu Cristofor · 11-11-2011, 03:19 PM

Originally posted by Deimos

Wait until you try focusing a 1.2 lens with the OVF!

Works fine for me. Not on the K-x/K-r of course - that would be a real challenge, but then it's a real challenge at higher apertures than 1.2 as well.

Laurentiu Cristofor · 11-11-2011, 03:21 PM

Originally posted by Pepe Guitarra

I need some advice: I purchased a Porst 55/1.2 from Ebay Germany and did not understand what the add said, this is about 3 months ago. It turned out that the lens is a PK mount, but it was reworked so that it only shoots in f1.2. It cannot be stopped down, so it works in Av mode in my K5 and Kx. I have taken some nice creative photos at f1.2. However, I would like to be able to stop the lens down and get some more usage from it. Does anyone know how to revert this operation? Does anyone have a Porst design? Thanks, Pepe

PK lenses can only be used stopped down in M mode, not in Av mode. Switch to M mode, select aperture via aperture ring, press green button for metering, press shutter.

Porst is made by Cosina. Cosina is made by Tomioka.

**Pepe Guitarra** · 11-11-2011, 04:00 PM

Well, this lens can be used in Av and M with no difference, it will always be in f1.2. That is the reason it does not matter Av or M. I want to know how can i fix it back to be able to be stopped down.

aurele · 11-11-2011, 04:19 PM

open it ! open the mount side. the K mount is pretty simple mecanisme.

Laurentiu Cristofor · 11-11-2011, 08:58 PM

Take some pictures of the mount also. Does it no longer have the aperture lever? Does the lever no longer activate the aperture? Are there any aperture blades left?

Quote:

Dr. Evil: Right, people you have to tell me these things, okay? I've been frozen for thirty years, okay? Throw me a frickin' bone here! I'm the boss! Need the info.

**Pepe Guitarra** · 11-11-2011, 11:20 PM

I opened it and will post photos tomorrow. I found that the iris open and closes when dissasembled, but it was stuck wide open. I also notice that one small string is broken. I put the whole thing back together and does not work at all. Now, it is worse, I found that some people complains about this Porst gets the aperture stuck wide open. I found a forum member fro Germany that posted photos of his lens and am trying to understand, they are not too many and not too clear. I wish I had a plan of the design.

vanakaru · 11-12-2011, 01:59 AM

I had Porst 55/1,2, but sold it due to very strong(almost psychedelic) CA at 1,2. Now I have Cosina 55/1,2 that is really wonderful lens. And the bokeh is much nicer than Porst. I wonder if this was made by Cosina/Tomioka why they make some lenses better than the others.
I know it is tempting to fix things, but I use my Cosina wide open exclusively so i would have left it stuck to 1,2. There are so many lenses for different purpose but 1,2 is rare and special. Pepe, I think you should find a master who can repair lenses. I am sure you can in California.

10-30-2011, 07:25 PM	#992
Laurentiu Cristofor Banned Join Date: Nov 2009 Location: WA Photos: Albums Posts: 3,055	Cosina 55/1.2@1.2 - Jar of Rain (jarofrain.com) A few from yesterday - full set, including B&W and color versions, is here:

11-12-2011, 01:59 AM	#1005
vanakaru Senior Member Join Date: Feb 2011 Location: Tallinn Photos: Gallery Posts: 162	I had Porst 55/1,2, but sold it due to very strong(almost psychedelic) CA at 1,2. Now I have Cosina 55/1,2 that is really wonderful lens. And the bokeh is much nicer than Porst. I wonder if this was made by Cosina/Tomioka why they make some lenses better than the others. I know it is tempting to fix things, but I use my Cosina wide open exclusively so i would have left it stuck to 1,2. There are so many lenses for different purpose but 1,2 is rare and special. Pepe, I think you should find a master who can repair lenses. I am sure you can in California. Last edited by vanakaru; 11-12-2011 at 02:04 AM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Post your 85mm ƒ1.4 Photos! (ƒ1.4 ONLY!)	PentaxForums-User	Lens Clubs	55	06-13-2021 02:51 AM
For Sale - Sold: FS Feeler: K series SMC 50 mm ƒ1.2 (Worldwide)	TheoSixx	Sold Items	2	06-01-2010 12:28 PM
Which ƒ1.2 Lens is Better?	PentaxForums-User	Pentax SLR Lens Discussion	30	01-31-2010 03:09 AM

10-30-2011, 09:09 AM	#991
Porga Site Supporter Join Date: Dec 2009 Photos: Albums Posts: 476	Originally posted by mclarenman01 Epic shot Porga! I love the colours! Originally posted by Deimos Great shots Porga! Originally posted by the swede Wow Porga, love the last two shots (keys and dog). Exellent! Thank you guys!

11-06-2011, 12:12 PM	#993
Porga Site Supporter Join Date: Dec 2009 Photos: Albums Posts: 476	Revuenon 55mm K-5

11-11-2011, 05:37 AM	#994
axl Veteran Member Join Date: Mar 2007 Location: Nove Zamky, Slovakia Photos: Gallery \| Albums Posts: 7,183	Looks like I'll be back soon! Just landed myself K50/1.2 just need to see if'll be able to MF it

11-11-2011, 06:05 AM	#995
Deimos Site Supporter Join Date: Oct 2010 Location: Kingdom of Wonder Posts: 1,777	Originally posted by axl Looks like I'll be back soon! Just landed myself K50/1.2 just need to see if'll be able to MF it Live View is your friend!

11-11-2011, 08:53 AM	#996
axl Veteran Member Join Date: Mar 2007 Location: Nove Zamky, Slovakia Photos: Gallery \| Albums Posts: 7,183	Originally posted by Deimos Live View is your friend! I hate LV... But we'll see

11-11-2011, 01:51 PM	#997
Deimos Site Supporter Join Date: Oct 2010 Location: Kingdom of Wonder Posts: 1,777	Originally posted by axl I hate LV... But we'll see Wait until you try focusing a 1.2 lens with the OVF! LV is a revelation for this. Much easier to nail focus AND you can see what the bokeh looks like while you compose That said its pretty much the only time I use LV

11-11-2011, 03:13 PM	#998
Pepe Guitarra Site Supporter Join Date: Nov 2010 Location: California Photos: Gallery \| Albums Posts: 2,223	I need some advice: I purchased a Porst 55/1.2 from Ebay Germany and did not understand what the add said, this is about 3 months ago. It turned out that the lens is a PK mount, but it was reworked so that it only shoots in f1.2. It cannot be stopped down, so it works in Av mode in my K5 and Kx. I have taken some nice creative photos at f1.2. However, I would like to be able to stop the lens down and get some more usage from it. Does anyone know how to revert this operation? Does anyone have a Porst design? Thanks, Pepe

11-11-2011, 03:19 PM	#999
Laurentiu Cristofor Banned Join Date: Nov 2009 Location: WA Photos: Albums Posts: 3,055	Originally posted by Deimos Wait until you try focusing a 1.2 lens with the OVF! Works fine for me. Not on the K-x/K-r of course - that would be a real challenge, but then it's a real challenge at higher apertures than 1.2 as well.

11-11-2011, 03:21 PM	#1000
Laurentiu Cristofor Banned Join Date: Nov 2009 Location: WA Photos: Albums Posts: 3,055	Originally posted by Pepe Guitarra I need some advice: I purchased a Porst 55/1.2 from Ebay Germany and did not understand what the add said, this is about 3 months ago. It turned out that the lens is a PK mount, but it was reworked so that it only shoots in f1.2. It cannot be stopped down, so it works in Av mode in my K5 and Kx. I have taken some nice creative photos at f1.2. However, I would like to be able to stop the lens down and get some more usage from it. Does anyone know how to revert this operation? Does anyone have a Porst design? Thanks, Pepe PK lenses can only be used stopped down in M mode, not in Av mode. Switch to M mode, select aperture via aperture ring, press green button for metering, press shutter. Porst is made by Cosina. Cosina is made by Tomioka.

11-11-2011, 04:00 PM	#1001
Pepe Guitarra Site Supporter Join Date: Nov 2010 Location: California Photos: Gallery \| Albums Posts: 2,223	Well, this lens can be used in Av and M with no difference, it will always be in f1.2. That is the reason it does not matter Av or M. I want to know how can i fix it back to be able to be stopped down.

11-11-2011, 04:19 PM	#1002
aurele Veteran Member Join Date: Jan 2011 Location: Paris, France Photos: Albums Posts: 3,217	open it ! open the mount side. the K mount is pretty simple mecanisme.

11-11-2011, 08:58 PM	#1003
Laurentiu Cristofor Banned Join Date: Nov 2009 Location: WA Photos: Albums Posts: 3,055	Take some pictures of the mount also. Does it no longer have the aperture lever? Does the lever no longer activate the aperture? Are there any aperture blades left? Quote: Dr. Evil: Right, people you have to tell me these things, okay? I've been frozen for thirty years, okay? Throw me a frickin' bone here! I'm the boss! Need the info.

11-11-2011, 11:20 PM	#1004
Pepe Guitarra Site Supporter Join Date: Nov 2010 Location: California Photos: Gallery \| Albums Posts: 2,223	I opened it and will post photos tomorrow. I found that the iris open and closes when dissasembled, but it was stuck wide open. I also notice that one small string is broken. I put the whole thing back together and does not work at all. Now, it is worse, I found that some people complains about this Porst gets the aperture stuck wide open. I found a forum member fro Germany that posted photos of his lens and am trying to understand, they are not too many and not too clear. I wish I had a plan of the design.

Post your ƒ1.2 Photos! (ƒ1.2 ONLY!)

Win a Pentax Limited Lens: Raffle Now Live!