SMC-Pentax-M 50mm F1.7

Michael Piziak · 01-25-2022, 12:37 PM

I was cleaning my lens & the rear lens/element just fail out. Very strange.

I pushed it back in and turned it a bit & it seems to be in there for good, for the time being.
Any thoughts/comments on this?

Reference:

SMC Pentax-M 50mm F1.7 Reviews - M Prime Lenses - Pentax Lens Reviews & Lens Database

stevebrot · 01-25-2022, 12:54 PM

I am pretty sure that removal normally requires a tool.

Steve

Michael Piziak · 01-25-2022, 01:01 PM

Originally posted by stevebrot

I am pretty sure that removal normally requires a tool.

Steve

I know, right. Well, I just bought it off the auction site....
The round black part that holds the lens fell out (with the lens in it)....

hmmmm

j0n4hpk · 01-25-2022, 02:53 PM

Those lenses are rugged and f a quite simple construction. I have a 28mm M f2.8 that is missing the rear baffle and, so far, it still works. s long as you have put the part back and tightened by hand, you should be ok. Yes, inspect it periodically.

vonBaloney · 01-25-2022, 10:12 PM - **1 Like**

Don't just place it back in, but screw it back in (with your hand).

**yucatanPentax** · 01-26-2022, 03:06 AM

Yes, do screw the retaining ring back in. Don't need to make it super tight. Just get it screwed in.

01-25-2022, 12:37 PM	#1
Michael Piziak Closed Account Join Date: Dec 2013 Location: West Virginia Posts: 2,815	SMC-Pentax-M 50mm F1.7 I was cleaning my lens & the rear lens/element just fail out. Very strange. I pushed it back in and turned it a bit & it seems to be in there for good, for the time being. Any thoughts/comments on this? Reference: SMC Pentax-M 50mm F1.7 Reviews - M Prime Lenses - Pentax Lens Reviews & Lens Database

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01-25-2022, 12:54 PM	#2
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	I am pretty sure that removal normally requires a tool. Steve

01-25-2022, 01:01 PM	#3
Michael Piziak Closed Account Join Date: Dec 2013 Location: West Virginia Posts: 2,815 Original Poster	Originally posted by stevebrot I am pretty sure that removal normally requires a tool. Steve I know, right. Well, I just bought it off the auction site.... The round black part that holds the lens fell out (with the lens in it).... hmmmm

01-25-2022, 02:53 PM	#4
j0n4hpk Senior Member Join Date: Apr 2009 Location: Ohio Photos: Gallery \| Albums Posts: 293	Those lenses are rugged and f a quite simple construction. I have a 28mm M f2.8 that is missing the rear baffle and, so far, it still works. s long as you have put the part back and tightened by hand, you should be ok. Yes, inspect it periodically.

01-25-2022, 10:12 PM - 1 Like	#5
vonBaloney Pentaxian Join Date: Oct 2011 Location: Albuquerque, NM Posts: 6,029	Don't just place it back in, but screw it back in (with your hand).

01-26-2022, 03:06 AM	#6
yucatanPentax Loyal Site Supporter Join Date: Dec 2009 Location: Dallas / Yucatan Posts: 1,841	Yes, do screw the retaining ring back in. Don't need to make it super tight. Just get it screwed in.