SMC Pentax 50mm f/1.4 disassemble

Pentaxguy22 · 08-11-2011, 05:36 PM

I took it all apart I just can't find how to get to the optics to clean them....yea this thing was dropped in the water...someone help me?

Last edited by Pentaxguy22; 08-11-2011 at 05:54 PM.

bobpur · 08-11-2011, 05:56 PM

Hi
Look Here

Pentax 50mm repair 1

adr1an · 08-11-2011, 05:57 PM

Slightly different lens - but it may offer help.
https://www.pentaxforums.com/forums/do-yourself/153858-how-remove-fungus-50mm-f1-7-lens.html
Looking at it - you just need the sink plug to remove the name ring and some spanner wrench or equivalent to open up the group.

Pentaxguy22 · 08-11-2011, 06:12 PM

WOW thanks everyone

Pentaxguy22 · 08-11-2011, 06:31 PM

okay I try a rubber stopper but that not working what is this spinner wrench?

JeffJS · 08-11-2011, 06:59 PM

A spanner wrench isn't going to get you started. It is a tool that looks basically like 2 small screw drivers joined by a metal bar(s). If you look at the lens element itself, you'll see 2 small slots on either side. The spanner wrench (is supposed to) go in those slots so you can twist the lens elements off. In order to do that, you're going to have to get that retaining ring off.

I Hope you made detailed notes on how you took this apart.

Pentaxguy22 · 08-11-2011, 07:18 PM

Yea I taken apart a Pentax 28-80mm lens got it back togeather after I clean it the eletronics was damaged when I got it so I took them out and use it as manual lens, anyone have any other ideas to remove the front plate? rubber stopper not working for me.

Class A · 08-11-2011, 07:24 PM

Originally posted by Pentaxlover22

...anyone have any other ideas to remove the front plate?

Try Blu-Tack stuck to the rim of a toilet paper roll core. Works for me.

You need to find the right balance between pressure on the ring and torque.

ultraviolet · 08-11-2011, 07:37 PM

Originally posted by Pentaxlover22

I took it all apart I just can't find how to get to the optics to clean them....yea this thing was dropped in the water...someone help me?

Time for you to take break and watch a youtube video linked here (how to clean a M 50mm f1.4)

You Tube

Pentaxguy22 · 08-11-2011, 07:41 PM

I got it off!!! thanks!!

I so happy I really want to clean this thing, this be my first f/1.4 best $24 I spend!
I will still need the wrench lol

Pentaxguy22 · 08-11-2011, 07:46 PM

WOW this just gets cooler, wrench aside I unscew it by turning it on the carpet

haha I am desperate to clean this lens lol

Thanks for the help everyone! this best site ever!

Looks like a few hours of cleaning off rust lol

Pentaxguy22 · 08-11-2011, 08:16 PM

The blades so rusty they came apart

I think I should left them alone, this thing must been in water for a while, I guess it can only be used as f/1.4 now, it will have to be for low light shots only, anyone think it worth more or what I pay for it even that this happen?
I know I can get good photos once I clean the optics.

JeffJS · 08-11-2011, 08:46 PM

It'll make a great bokeh lens and the next one, you'll know exactly what to do

tackyat.2 · 08-13-2011, 11:00 AM - **1 Like**

If you're feeling adventurous, you could do this with your lens:

DIY - Create Your Own Bokeh | DIYPhotography.net

It's essentially creating your own external aperture. The shape could be round, or a custom shape like in that link there.
But just because it doesn't have an aperture doesn't mean you can't make one.

08-11-2011, 05:36 PM	#1
Pentaxguy22 Veteran Member Join Date: Oct 2009 Location: Texas Photos: Gallery \| Albums Posts: 384	SMC Pentax 50mm f/1.4 disassemble I took it all apart I just can't find how to get to the optics to clean them....yea this thing was dropped in the water...someone help me? Last edited by Pentaxguy22; 08-11-2011 at 05:54 PM.

08-11-2011, 07:46 PM	#11
Pentaxguy22 Veteran Member Join Date: Oct 2009 Location: Texas Photos: Gallery \| Albums Posts: 384 Original Poster	WOW this just gets cooler, wrench aside I unscew it by turning it on the carpet haha I am desperate to clean this lens lol Thanks for the help everyone! this best site ever! Looks like a few hours of cleaning off rust lol Last edited by Pentaxguy22; 08-11-2011 at 07:53 PM.

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08-11-2011, 05:56 PM	#2
bobpur Inactive Account Join Date: Jul 2010 Photos: Gallery Posts: 328	Hi Look Here Pentax 50mm repair 1

08-11-2011, 05:57 PM	#3
adr1an Veteran Member Join Date: Sep 2010 Location: Canberra Photos: Gallery \| Albums Posts: 739	Slightly different lens - but it may offer help. https://www.pentaxforums.com/forums/do-yourself/153858-how-remove-fungus-50mm-f1-7-lens.html Looking at it - you just need the sink plug to remove the name ring and some spanner wrench or equivalent to open up the group.

08-11-2011, 06:12 PM	#4
Pentaxguy22 Veteran Member Join Date: Oct 2009 Location: Texas Photos: Gallery \| Albums Posts: 384 Original Poster	WOW thanks everyone

08-11-2011, 06:31 PM	#5
Pentaxguy22 Veteran Member Join Date: Oct 2009 Location: Texas Photos: Gallery \| Albums Posts: 384 Original Poster	okay I try a rubber stopper but that not working what is this spinner wrench?

08-11-2011, 06:59 PM	#6
JeffJS Inactive Account Join Date: Aug 2008 Location: Michigan, USA Photos: Gallery \| Albums Posts: 7,484	A spanner wrench isn't going to get you started. It is a tool that looks basically like 2 small screw drivers joined by a metal bar(s). If you look at the lens element itself, you'll see 2 small slots on either side. The spanner wrench (is supposed to) go in those slots so you can twist the lens elements off. In order to do that, you're going to have to get that retaining ring off. I Hope you made detailed notes on how you took this apart.

08-11-2011, 07:18 PM	#7
Pentaxguy22 Veteran Member Join Date: Oct 2009 Location: Texas Photos: Gallery \| Albums Posts: 384 Original Poster	Yea I taken apart a Pentax 28-80mm lens got it back togeather after I clean it the eletronics was damaged when I got it so I took them out and use it as manual lens, anyone have any other ideas to remove the front plate? rubber stopper not working for me.

08-11-2011, 07:24 PM	#8
Class A Pentaxian Join Date: Aug 2008 Location: Wellington, New Zealand Posts: 11,251	Originally posted by Pentaxlover22 ...anyone have any other ideas to remove the front plate? Try Blu-Tack stuck to the rim of a toilet paper roll core. Works for me. You need to find the right balance between pressure on the ring and torque.

08-11-2011, 07:41 PM	#10
Pentaxguy22 Veteran Member Join Date: Oct 2009 Location: Texas Photos: Gallery \| Albums Posts: 384 Original Poster	I got it off!!! thanks!! I so happy I really want to clean this thing, this be my first f/1.4 best $24 I spend! I will still need the wrench lol

08-11-2011, 08:16 PM	#12
Pentaxguy22 Veteran Member Join Date: Oct 2009 Location: Texas Photos: Gallery \| Albums Posts: 384 Original Poster	The blades so rusty they came apart I think I should left them alone, this thing must been in water for a while, I guess it can only be used as f/1.4 now, it will have to be for low light shots only, anyone think it worth more or what I pay for it even that this happen? I know I can get good photos once I clean the optics.

08-11-2011, 08:46 PM	#13
JeffJS Inactive Account Join Date: Aug 2008 Location: Michigan, USA Photos: Gallery \| Albums Posts: 7,484	It'll make a great bokeh lens and the next one, you'll know exactly what to do

08-13-2011, 11:00 AM - 1 Like	#14
tackyat.2 Senior Member Join Date: Sep 2010 Location: New York Photos: Gallery Posts: 181	If you're feeling adventurous, you could do this with your lens: DIY - Create Your Own Bokeh \| DIYPhotography.net It's essentially creating your own external aperture. The shape could be round, or a custom shape like in that link there. But just because it doesn't have an aperture doesn't mean you can't make one.