the Pentax 40mm and 43mm Lens Club

jgnfld · 12-30-2019, 01:27 PM

Noticed this reflection from a Metropolitan Museum of Arts poster near the Xmas tree in my living room. Not sure how artistic it is, but it IS a cat! And it is a 40mm Ltd. xposted to the Thematic Cats! thread.

xposted to Thematic Cats!

Last edited by jgnfld; 12-30-2019 at 01:51 PM.

**aslyfox** · 12-30-2019, 01:30 PM

Originally posted by -JW-

Since there are a lot of users of the DA 40mm in this group, a quick question:
Has any of you experienced a sticky aperture before?

The aperture on my DA40 all of a sudden started to close down as if it were dampened, weird thing is I don't see any oil on the blades.
Can't use it above F8.0, or with higher shutter speeds, it doesn't close down fast enough. Also slightly worried that oil will get into my camera, if it is oil.
Wiggling the lever around speeds it up a bit for a while.

I have had no problem with my SMC Pentax-DA 40mm F2.8 Limited

It was bought as used equipment, not new

**UncleVanya** · 12-31-2019, 09:18 AM

Generated from my Motorola o using tools.sportscard.trade

DA 40 w/25mm extension tube.

**clickclick** · 12-31-2019, 01:16 PM - **5 Likes**

Was browsing through some older files and came across this. Think this was the first shot with my 43 on my K-1, and 19th shot with my K-1 in general.

.

Attached Images

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**clickclick** · 12-31-2019, 01:32 PM - **5 Likes**

And a little later the same day with the 43, my trusty model about to break into one of her silly grins.

.

**MiguelATF** · 12-31-2019, 07:19 PM

Taken with my DA40, on my KP, in the post-holiday Christmas clearances, where this giant Nutcracker seemed far too lonely and isolated -

EssJay · 01-01-2020, 12:31 PM - **3 Likes**

Misty Cow - HD 40mm

Attached Images

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-JW- · 01-04-2020, 07:53 AM

Originally posted by clickclick

And a little later the same day with the 43, my trusty model about to break into one of her silly grins.

.

nice bokeh on that 43mm

**Cerebum** · 01-04-2020, 05:43 PM - **2 Likes**

I have put my 40mm xs on eBay to raise cash to pay for a Fuji X-E1 that I have already purchased. I thought it would be fun, before it sells, to pair them up. I am now considering removing the listing, it was that good

**Kerrowdown** · 01-08-2020, 04:16 AM - **2 Likes**

A Scottish town with a bygone feel.

**barondla** · 01-08-2020, 04:58 AM

Originally posted by Kerrowdown

A Scottish town with a bygone feel.

The post processing suits this subject well. Image feels like it came from an earlier time.
Thanks for sharing,
barondla

**Kerrowdown** · 01-08-2020, 05:21 AM

Originally posted by barondla

The post processing suits this subject well. Image feels like it came from an earlier time.
Thanks for sharing, barondla

Thank you for your kind comments.

bdery · 01-08-2020, 05:39 AM

Originally posted by -JW-

Since there are a lot of users of the DA 40mm in this group, a quick question:
Has any of you experienced a sticky aperture before?

Never happened to me in the 4-5 years I owned the lens.

Most repair shops, even if not Pentax authorized, should be able to fix this.

torashi · 01-08-2020, 11:47 AM

Originally posted by -JW-

Since there are a lot of users of the DA 40mm in this group, a quick question:
Has any of you experienced a sticky aperture before?

The aperture on my DA40 all of a sudden started to close down as if it were dampened, weird thing is I don't see any oil on the blades.
Can't use it above F8.0, or with higher shutter speeds, it doesn't close down fast enough. Also slightly worried that oil will get into my camera, if it is oil.
Wiggling the lever around speeds it up a bit for a while.

It definitely needs a CLA. There are a couple of screws that calibrate automatic apertures. They could also be the culprit. It's best to send it in for a service before it gets worse. A loose screw can cause some damage. Regarding the aperture, once oil starts to appear on the blades, it's already on the perforated rings that move them and other parts of the mechanism. It's basically the last sign.

torashi · 01-08-2020, 11:49 AM

Originally posted by UncleVanya

Generated from my Motorola o using tools.sportscard.trade

DA 40 w/25mm extension tube.

What kind of extension tubes are you using? Asking because one without contacts would limit the aperture to f/22.

01-08-2020, 04:16 AM - 2 Likes	#190
Kerrowdown PEG Moderator Join Date: Aug 2008 Location: Highlands of Scotland... "Hold Infinity in the palm of your hand" - William Blake Photos: Gallery Posts: 57,860	Yesteryear Yesterday A Scottish town with a bygone feel. Last edited by Kerrowdown; 01-08-2020 at 05:15 AM.

01-08-2020, 11:47 AM	#194
torashi Veteran Member Join Date: Sep 2017 Location: Medellín Posts: 1,322	Originally posted by -JW- Since there are a lot of users of the DA 40mm in this group, a quick question: Has any of you experienced a sticky aperture before? The aperture on my DA40 all of a sudden started to close down as if it were dampened, weird thing is I don't see any oil on the blades. Can't use it above F8.0, or with higher shutter speeds, it doesn't close down fast enough. Also slightly worried that oil will get into my camera, if it is oil. Wiggling the lever around speeds it up a bit for a while. It definitely needs a CLA. There are a couple of screws that calibrate automatic apertures. They could also be the culprit. It's best to send it in for a service before it gets worse. A loose screw can cause some damage. Regarding the aperture, once oil starts to appear on the blades, it's already on the perforated rings that move them and other parts of the mechanism. It's basically the last sign. Last edited by torashi; 01-08-2020 at 12:19 PM.

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12-30-2019, 01:27 PM	#181
jgnfld Moderator Loyal Site Supporter Join Date: Feb 2015 Location: Avalon Peninsula, Newfoundland Photos: Gallery \| Albums Posts: 1,798	Noticed this reflection from a Metropolitan Museum of Arts poster near the Xmas tree in my living room. Not sure how artistic it is, but it IS a cat! And it is a 40mm Ltd. xposted to the Thematic Cats! thread. xposted to Thematic Cats! Last edited by jgnfld; 12-30-2019 at 01:51 PM.

12-30-2019, 01:30 PM	#182
aslyfox Seeker of Knowledge Join Date: Aug 2016 Location: Topeka, Kansas Photos: Gallery \| Albums Posts: 24,582 Original Poster	Originally posted by -JW- Since there are a lot of users of the DA 40mm in this group, a quick question: Has any of you experienced a sticky aperture before? The aperture on my DA40 all of a sudden started to close down as if it were dampened, weird thing is I don't see any oil on the blades. Can't use it above F8.0, or with higher shutter speeds, it doesn't close down fast enough. Also slightly worried that oil will get into my camera, if it is oil. Wiggling the lever around speeds it up a bit for a while. I have had no problem with my SMC Pentax-DA 40mm F2.8 Limited It was bought as used equipment, not new

12-31-2019, 09:18 AM	#183
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,452	Generated from my Motorola o using tools.sportscard.trade DA 40 w/25mm extension tube.

01-04-2020, 07:53 AM	#188
-JW- Senior Member Join Date: Nov 2011 Location: Eindhoven Posts: 139	Originally posted by clickclick And a little later the same day with the 43, my trusty model about to break into one of her silly grins. . nice bokeh on that 43mm

01-04-2020, 05:43 PM - 2 Likes	#189
Cerebum Site Supporter Join Date: Oct 2017 Location: Lancaster Photos: Gallery Posts: 3,829	I have put my 40mm xs on eBay to raise cash to pay for a Fuji X-E1 that I have already purchased. I thought it would be fun, before it sells, to pair them up. I am now considering removing the listing, it was that good

01-08-2020, 04:58 AM	#191
barondla Site Supporter Join Date: Sep 2006 Location: midwest, United States Photos: Gallery \| Albums Posts: 5,715	Originally posted by Kerrowdown A Scottish town with a bygone feel. The post processing suits this subject well. Image feels like it came from an earlier time. Thanks for sharing, barondla

01-08-2020, 05:21 AM	#192
Kerrowdown PEG Moderator Join Date: Aug 2008 Location: Highlands of Scotland... "Hold Infinity in the palm of your hand" - William Blake Photos: Gallery Posts: 57,860	Originally posted by barondla The post processing suits this subject well. Image feels like it came from an earlier time. Thanks for sharing, barondla Thank you for your kind comments.

01-08-2020, 05:39 AM	#193
bdery Pentaxian Join Date: Mar 2008 Location: Quebec city, Canada Photos: Gallery Posts: 9,362	Originally posted by -JW- Since there are a lot of users of the DA 40mm in this group, a quick question: Has any of you experienced a sticky aperture before? Never happened to me in the 4-5 years I owned the lens. Most repair shops, even if not Pentax authorized, should be able to fix this.

01-08-2020, 11:49 AM	#195
torashi Veteran Member Join Date: Sep 2017 Location: Medellín Posts: 1,322	Originally posted by UncleVanya Generated from my Motorola o using tools.sportscard.trade DA 40 w/25mm extension tube. What kind of extension tubes are you using? Asking because one without contacts would limit the aperture to f/22.