focusing problems with my SMC Pentax-D FA 100mm F2.8 Macro ( non WR )

**aslyfox** · 04-16-2020, 10:06 AM

out trying to take photos with my K 3 II and the SMC Pentax-D FA 100mm F2.8 Macro ( non WR )

the autofocus seemed to get " stuck " from time to time, it would not focus for close work

took the lens off, no difference

turned camera off and on

no difference

then it started to work properly again

thoughts?

**Riggomatic** · 04-16-2020, 10:47 AM

Could be the contacts. That's what I check first when having this type of an issue with a lens.

I use a pencil eraser

**aslyfox** · 04-16-2020, 03:03 PM - **1 Like**

Originally posted by Riggomatic

Could be the contacts. That's what I check first when having this type of an issue with a lens.

I use a pencil eraser

I thought of that but didn't see anything

and the lens screwed up and then worked properly without me cleaning the contacts ?

**rogerstg** · 04-16-2020, 06:43 PM - **1 Like**

Originally posted by aslyfox

I thought of that but didn't see anything

Clean the contacts anyway. The oxidation is not visible. It's not uncommon for me to get black residue on a cleaning cloth from clean looking contacts.

**aslyfox** · 04-17-2020, 09:44 AM

thanks

I will do so

**aslyfox** · 04-27-2020, 11:44 AM

well

I tried myself and no luck

luckily Phototronic is still accepting work

https://phototronic.biz/

I will be dropping it off today

and bonus, he comes to the vehicle

what service

**aslyfox** · 05-13-2020, 01:53 PM

up date

well, I managed to screw up the D FA 100mm F2.8 Macro and my craftsman cannot get parts

so I placed a wanted notice here at the forum on May 6

good news is that I got 3 responses and its replacement is being shipped to me soon subject to my final approval

04-16-2020, 10:06 AM	#1
aslyfox Seeker of Knowledge Join Date: Aug 2016 Location: Topeka, Kansas Photos: Gallery \| Albums Posts: 24,583	focusing problems with my SMC Pentax-D FA 100mm F2.8 Macro ( non WR ) out trying to take photos with my K 3 II and the SMC Pentax-D FA 100mm F2.8 Macro ( non WR ) the autofocus seemed to get " stuck " from time to time, it would not focus for close work took the lens off, no difference turned camera off and on no difference then it started to work properly again thoughts?

04-16-2020, 10:47 AM	#2
Riggomatic Loyal Site Supporter Join Date: Nov 2014 Location: Auburn, Indiana Photos: Albums Posts: 3,886	Could be the contacts. That's what I check first when having this type of an issue with a lens. I use a pencil eraser Last edited by Riggomatic; 04-16-2020 at 10:48 AM. Reason: added cleaning method

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04-16-2020, 03:03 PM - 1 Like	#3
aslyfox Seeker of Knowledge Join Date: Aug 2016 Location: Topeka, Kansas Photos: Gallery \| Albums Posts: 24,583 Original Poster	Originally posted by Riggomatic Could be the contacts. That's what I check first when having this type of an issue with a lens. I use a pencil eraser I thought of that but didn't see anything and the lens screwed up and then worked properly without me cleaning the contacts ?

04-16-2020, 06:43 PM - 1 Like	#4
rogerstg Loyal Site Supporter Join Date: Oct 2007 Location: Rhode Island Photos: Albums Posts: 1,168	Originally posted by aslyfox I thought of that but didn't see anything Clean the contacts anyway. The oxidation is not visible. It's not uncommon for me to get black residue on a cleaning cloth from clean looking contacts.

04-17-2020, 09:44 AM	#5
aslyfox Seeker of Knowledge Join Date: Aug 2016 Location: Topeka, Kansas Photos: Gallery \| Albums Posts: 24,583 Original Poster	thanks I will do so

04-27-2020, 11:44 AM	#6
aslyfox Seeker of Knowledge Join Date: Aug 2016 Location: Topeka, Kansas Photos: Gallery \| Albums Posts: 24,583 Original Poster	well I tried myself and no luck luckily Phototronic is still accepting work https://phototronic.biz/ I will be dropping it off today and bonus, he comes to the vehicle what service

05-13-2020, 01:53 PM	#7
aslyfox Seeker of Knowledge Join Date: Aug 2016 Location: Topeka, Kansas Photos: Gallery \| Albums Posts: 24,583 Original Poster	up date well, I managed to screw up the D FA 100mm F2.8 Macro and my craftsman cannot get parts so I placed a wanted notice here at the forum on May 6 good news is that I got 3 responses and its replacement is being shipped to me soon subject to my final approval