Pentax K-50: Need help

SunnyG. · 11-01-2020, 05:05 PM

I updated my K-50, to the recent firmware. Now in manual mode, I can't set the camera between ISO 800 - ISO 1600. After I reach iso 800, the camera jumps to iso 1600.

I don't understand what's happening?

Not only that I can't under expose my images. Am I doing something wrong?

Aaron28 · 11-01-2020, 05:12 PM

Originally posted by SunnyG.

After I reach iso 800, the camera jumps to iso 1600.

is it set to 1/2 or 1/3 ev steps? believe thats in the custom menu........also some things are not available at 1/2 step whereas 1/3 step allows i ferget what they are but remember having to change to 1/3 steps

don't know why you can't EV - for under expose......

stevebrot · 11-01-2020, 06:12 PM

Originally posted by SunnyG.

I updated my K-50, to the recent firmware. Now in manual mode, I can't set the camera between ISO 800 - ISO 1600. After I reach iso 800, the camera jumps to iso 1600.

I don't understand what's happening?

Not only that I can't under expose my images. Am I doing something wrong?

Do you have exposure compensation set? Are you in bracketing mode? FWIW, the default interval for ISO is 1 EV, unless you have overridden that setting (C2, Sensitivity Steps), the step to 1600 sounds right.

Intentional underexpose fails? Please explain how you are attempting to do that.

Steve

**grog85361** · 11-01-2020, 06:15 PM - **2 Likes**

Check the Custom Menu item 2,"Sensitivity Steps"> If it is set to "1", ISO will adjust in 1EV steps, which is the condition you are seeing. Set it to "2", "As EV Steps", and ISO will adjust in the same steps as Custom Menu "1", EV Steps", which selects 1/2 EV or 1/3 EV steps. I hope this helps!

HoutHans · 11-02-2020, 07:27 AM

Indeed, by adjusting the EV-steps you should be able to change this. Also, I'm unsure what is happening with the exposure. I can underexpose without any problem in manual mode. Can you provide more details?

Not a Number · 11-02-2020, 08:29 AM

Yes, more information is needed. How are you trying underexpose?

**DWS1** · 11-02-2020, 08:47 AM

Originally posted by grog85361

Check the Custom Menu item 2,"Sensitivity Steps"> If it is set to "1", ISO will adjust in 1EV steps, which is the condition you are seeing. Set it to "2", "As EV Steps", and ISO will adjust in the same steps as Custom Menu "1", EV Steps", which selects 1/2 EV or 1/3 EV steps. I hope this helps!

This!

akparnanen · 11-02-2020, 12:38 PM

I don't know if this has anything to do with your problem, but remember also that the change from 800 to 1600 is as large as from 100 to 200. It's a logarithmic scale.

SunnyG. · 11-03-2020, 04:34 AM

Originally posted by Aaron28

is it set to 1/2 or 1/3 ev steps? believe thats in the custom menu........also some things are not available at 1/2 step whereas 1/3 step allows i ferget what they are but remember having to change to 1/3 steps

don't know why you can't EV - for under expose......

I haven't touched the custom menu settings! I think there in the problem lies. Thanks for the suggestion

---------- Post added 11-03-20 at 04:35 AM ----------

Originally posted by grog85361

Check the Custom Menu item 2,"Sensitivity Steps"> If it is set to "1", ISO will adjust in 1EV steps, which is the condition you are seeing. Set it to "2", "As EV Steps", and ISO will adjust in the same steps as Custom Menu "1", EV Steps", which selects 1/2 EV or 1/3 EV steps. I hope this helps!

Thank you! That's very helpful! Thank you for helping me!

**grog85361** · 11-03-2020, 08:18 AM - **1 Like**

Originally posted by SunnyG.

I haven't touched the custom menu settings! I think there in the problem lies. Thanks for the suggestion

---------- Post added 11-03-20 at 04:35 AM ----------

Thank you! That's very helpful! Thank you for helping me!

You are welcome! It's what we are here for

Aaron28 · 11-03-2020, 04:16 PM

Originally posted by SunnyG.

I haven't touched the custom menu settings! I think there in the problem lies. Thanks for the suggestion

cool good luck and report back success or fail......

SunnyG. · 11-04-2020, 12:07 PM

Originally posted by Aaron28

cool good luck and report back success or fail......

Definitely will report back!

11-01-2020, 05:05 PM	#1
SunnyG. Veteran Member Join Date: Apr 2017 Posts: 428	Pentax K-50: Need help I updated my K-50, to the recent firmware. Now in manual mode, I can't set the camera between ISO 800 - ISO 1600. After I reach iso 800, the camera jumps to iso 1600. I don't understand what's happening? Not only that I can't under expose my images. Am I doing something wrong?

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11-01-2020, 05:12 PM	#2
Aaron28 Pentaxian Join Date: Jan 2015 Location: Huntsville, Al Posts: 7,131	Originally posted by SunnyG. After I reach iso 800, the camera jumps to iso 1600. is it set to 1/2 or 1/3 ev steps? believe thats in the custom menu........also some things are not available at 1/2 step whereas 1/3 step allows i ferget what they are but remember having to change to 1/3 steps don't know why you can't EV - for under expose......

11-01-2020, 06:12 PM	#3
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by SunnyG. I updated my K-50, to the recent firmware. Now in manual mode, I can't set the camera between ISO 800 - ISO 1600. After I reach iso 800, the camera jumps to iso 1600. I don't understand what's happening? Not only that I can't under expose my images. Am I doing something wrong? Do you have exposure compensation set? Are you in bracketing mode? FWIW, the default interval for ISO is 1 EV, unless you have overridden that setting (C2, Sensitivity Steps), the step to 1600 sounds right. Intentional underexpose fails? Please explain how you are attempting to do that. Steve

11-01-2020, 06:15 PM - 2 Likes	#4
grog85361 Site Supporter Join Date: Dec 2010 Location: Phoenix Arizona Photos: Gallery \| Albums Posts: 893	Check the Custom Menu item 2,"Sensitivity Steps"> If it is set to "1", ISO will adjust in 1EV steps, which is the condition you are seeing. Set it to "2", "As EV Steps", and ISO will adjust in the same steps as Custom Menu "1", EV Steps", which selects 1/2 EV or 1/3 EV steps. I hope this helps!

11-02-2020, 07:27 AM	#5
HoutHans Pentaxian Join Date: Aug 2016 Location: Appingedam Photos: Gallery Posts: 3,119	Indeed, by adjusting the EV-steps you should be able to change this. Also, I'm unsure what is happening with the exposure. I can underexpose without any problem in manual mode. Can you provide more details?

11-02-2020, 08:29 AM	#6
Not a Number Moderator Join Date: Mar 2012 Location: Venice, CA Posts: 10,526	Yes, more information is needed. How are you trying underexpose?

11-02-2020, 08:47 AM	#7
DWS1 Site Supporter Join Date: Aug 2018 Location: Arkansas, USA Posts: 1,169	Originally posted by grog85361 Check the Custom Menu item 2,"Sensitivity Steps"> If it is set to "1", ISO will adjust in 1EV steps, which is the condition you are seeing. Set it to "2", "As EV Steps", and ISO will adjust in the same steps as Custom Menu "1", EV Steps", which selects 1/2 EV or 1/3 EV steps. I hope this helps! This!

11-02-2020, 12:38 PM	#8
akparnanen New Member Join Date: Feb 2017 Posts: 12	I don't know if this has anything to do with your problem, but remember also that the change from 800 to 1600 is as large as from 100 to 200. It's a logarithmic scale.

11-03-2020, 04:34 AM	#9
SunnyG. Veteran Member Join Date: Apr 2017 Posts: 428 Original Poster	Originally posted by Aaron28 is it set to 1/2 or 1/3 ev steps? believe thats in the custom menu........also some things are not available at 1/2 step whereas 1/3 step allows i ferget what they are but remember having to change to 1/3 steps don't know why you can't EV - for under expose...... I haven't touched the custom menu settings! I think there in the problem lies. Thanks for the suggestion ---------- Post added 11-03-20 at 04:35 AM ---------- Originally posted by grog85361 Check the Custom Menu item 2,"Sensitivity Steps"> If it is set to "1", ISO will adjust in 1EV steps, which is the condition you are seeing. Set it to "2", "As EV Steps", and ISO will adjust in the same steps as Custom Menu "1", EV Steps", which selects 1/2 EV or 1/3 EV steps. I hope this helps! Thank you! That's very helpful! Thank you for helping me!

11-03-2020, 08:18 AM - 1 Like	#10
grog85361 Site Supporter Join Date: Dec 2010 Location: Phoenix Arizona Photos: Gallery \| Albums Posts: 893	Originally posted by SunnyG. I haven't touched the custom menu settings! I think there in the problem lies. Thanks for the suggestion ---------- Post added 11-03-20 at 04:35 AM ---------- Thank you! That's very helpful! Thank you for helping me! You are welcome! It's what we are here for

11-03-2020, 04:16 PM	#11
Aaron28 Pentaxian Join Date: Jan 2015 Location: Huntsville, Al Posts: 7,131	Originally posted by SunnyG. I haven't touched the custom menu settings! I think there in the problem lies. Thanks for the suggestion cool good luck and report back success or fail......

11-04-2020, 12:07 PM	#12
SunnyG. Veteran Member Join Date: Apr 2017 Posts: 428 Original Poster	Originally posted by Aaron28 cool good luck and report back success or fail...... Definitely will report back!