18-55mm lens not working on my K50 but does work on my ist DS(older one)

scarlett_.x · 02-19-2021, 12:53 PM

Hi, I am taking photography in college and my 18-55mm DA lens on my K50 started taking very dark photographs.. I’ve seen it mentioned before however, I put on my macro lenses and they work fine so I thought it was the lens. I tried it on my older camera and it seems to work... I am so confused and would appreciate the help! Thank you

**jatrax** · 02-19-2021, 01:12 PM

Which macro lens are you using?

I hope not but you may be experiencing aperture block failure on the K-50.

**sergysergy** · 02-19-2021, 01:12 PM

Clean the contacts in both the camera mount and the lens. It you are getting dark pictures it might be the aperture block problem.

**ramseybuckeye** · 02-19-2021, 01:40 PM

What are the macro lenses, that’s important to diagnose a possible aperture block problem.

dvoth · 02-19-2021, 02:41 PM

When you get dark exposures on the K-50 the Pentax "K-30 & K-50 forum" has information for checking what may be happening including in this thread. I had to go through this too.

**UncleVanya** · 02-19-2021, 07:07 PM

Any chance the macro lens has an aperture ring without the “A” setting or it has the “A” setting and you use it on a directly selected aperture via the ring?

scarlett_.x · 02-20-2021, 03:25 AM

Originally posted by UncleVanya

Any chance the macro lens has an aperture ring without the “A” setting or it has the “A” setting and you use it on a directly selected aperture via the ring?

They don’t have the ‘A’, They also aren't working on my k50 now... The aperture and shutter speed isn’t showing and it won’t let me take a photograph...

**UncleVanya** · 02-20-2021, 07:44 AM

Originally posted by scarlett_.x

They don’t have the ‘A’, They also aren't working on my k50 now... The aperture and shutter speed isn’t showing and it won’t let me take a photograph...

The aperture block failure doesn’t stop the use of lenses with manual aperture at first. Later the entire shutter can stop, but I’ve never heard of the latest symptom you mentioned. Is it possible the battery has just died on top of the other issues?

Bertrand3000 · 02-20-2021, 10:42 AM

It is probably aperture block failure on the K50. About the manual lenses, you need to enable "use aperture ring" in the settings, otherwise you won't be able to take a shot.

02-19-2021, 12:53 PM	#1
scarlett_.x New Member Join Date: Feb 2021 Posts: 2	18-55mm lens not working on my K50 but does work on my ist DS(older one) Hi, I am taking photography in college and my 18-55mm DA lens on my K50 started taking very dark photographs.. I’ve seen it mentioned before however, I put on my macro lenses and they work fine so I thought it was the lens. I tried it on my older camera and it seems to work... I am so confused and would appreciate the help! Thank you

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02-19-2021, 01:12 PM	#2
jatrax Site Supporter Join Date: May 2010 Location: Washington Cascades Photos: Gallery \| Albums Posts: 12,991	Which macro lens are you using? I hope not but you may be experiencing aperture block failure on the K-50.

02-19-2021, 01:12 PM	#3
sergysergy Site Supporter Join Date: Jan 2011 Photos: Gallery Posts: 5,170	Clean the contacts in both the camera mount and the lens. It you are getting dark pictures it might be the aperture block problem.

02-19-2021, 01:40 PM	#4
ramseybuckeye Site Supporter Join Date: Apr 2009 Location: Hampstead, NC Photos: Gallery Posts: 17,291	What are the macro lenses, that’s important to diagnose a possible aperture block problem.

02-19-2021, 02:41 PM	#5
dvoth Junior Member Join Date: Jun 2019 Location: British Columbia Posts: 33	When you get dark exposures on the K-50 the Pentax "K-30 & K-50 forum" has information for checking what may be happening including in this thread. I had to go through this too.

02-19-2021, 07:07 PM	#6
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,401	Any chance the macro lens has an aperture ring without the “A” setting or it has the “A” setting and you use it on a directly selected aperture via the ring?

02-20-2021, 03:25 AM	#7
scarlett_.x New Member Join Date: Feb 2021 Posts: 2 Original Poster	Originally posted by UncleVanya Any chance the macro lens has an aperture ring without the “A” setting or it has the “A” setting and you use it on a directly selected aperture via the ring? They don’t have the ‘A’, They also aren't working on my k50 now... The aperture and shutter speed isn’t showing and it won’t let me take a photograph...

02-20-2021, 07:44 AM	#8
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,401	Originally posted by scarlett_.x They don’t have the ‘A’, They also aren't working on my k50 now... The aperture and shutter speed isn’t showing and it won’t let me take a photograph... The aperture block failure doesn’t stop the use of lenses with manual aperture at first. Later the entire shutter can stop, but I’ve never heard of the latest symptom you mentioned. Is it possible the battery has just died on top of the other issues?

02-20-2021, 10:42 AM	#9
Bertrand3000 Veteran Member Join Date: Feb 2019 Posts: 2,009	It is probably aperture block failure on the K50. About the manual lenses, you need to enable "use aperture ring" in the settings, otherwise you won't be able to take a shot.