ISO AUTO in M and the first impressions

**i_trax** · 07-28-2012, 05:12 AM

In K-30 there is a surprising option in M, you can set ISO to AUTO but Green Button will not perform Stop Down metering with manual lenses.
After downloading the pdf manual I have discovered that:
"If the mode dial is set to M when the sensitivity is set to [ISO AUTO] , the camera operates in TAv mode."

Turning the LCD off is a bit fiddly, you can not just toggle INFO button like you could on Q, K-x,K-5&K-7, it requires few more steps.
Magnifying in Live View is again a bit confusing, all those matters could be easily fixed with firmware update.

Camera is well build but it feels much more like K-x/r than K-5/7, IMO the MENU button is too close to WB ( four-way controller) , I keep entering the MENU instead of selecting the options but I am pretty sure I will get use to it.
It should definitely be supplied with AA adaptor as a standard accessory.I had plenty Eneloops ready to go, I had to wait for hourd for the charger to charge the supplied rechargeable instead, before I could turn it on. My AA adaptor on the back order.
Nevertheless K-30 is an another example of excellent Pentax engineering indeed.

**i_trax** · 07-28-2012, 10:32 PM

http://www.flickr.com/photos/itrax/sets/72157630797782022/detail/

Fogel70 · 07-29-2012, 11:39 AM

I'm not sure it is a good or bad thing that it's possible to use auto-ISO i M-mode when there is TAv mode on K30.
And as exposure compensation is not available in M-mode, it is not as flexible as TAv-mode.

So I might be a little confusing.

rad291 · 12-11-2012, 11:00 PM

Originally posted by i_trax

In K-30 there is a surprising option in M, you can set ISO to AUTO but Green Button will not perform Stop Down metering with manual lenses.
After downloading the pdf manual I have discovered that:
"If the mode dial is set to M when the sensitivity is set to [ISO AUTO] , the camera operates in TAv mode."

Turning the LCD off is a bit fiddly, you can not just toggle INFO button like you could on Q, K-x,K-5&K-7, it requires few more steps.
Magnifying in Live View is again a bit confusing, all those matters could be easily fixed with firmware update.

Camera is well build but it feels much more like K-x/r than K-5/7, IMO the MENU button is too close to WB ( four-way controller) , I keep entering the MENU instead of selecting the options but I am pretty sure I will get use to it.
It should definitely be supplied with AA adaptor as a standard accessory.I had plenty Eneloops ready to go, I had to wait for hourd for the charger to charge the supplied rechargeable instead, before I could turn it on. My AA adaptor on the back order.
Nevertheless K-30 is an another example of excellent Pentax engineering indeed.

i_trax, I am having trouble getting a non A series manual Takumar to stop down. I was told if I turn off the auto iso that would allow the camera to down stop when the picture is taken. Trouble is that having done a fair amount of looking, I have not been able to find out how to turn off auto iso. Would be much obliged if you could provide the steps. Then, if I understanding correctly, when I take the picture the camera actually actuates the aperture to the f stop I have set the dial on the lens to?

Adam · 12-11-2012, 11:15 PM

Originally posted by rad291

i_trax, I am having trouble getting a non A series manual Takumar to stop down. I was told if I turn off the auto iso that would allow the camera to down stop when the picture is taken. Trouble is that having done a fair amount of looking, I have not been able to find out how to turn off auto iso. Would be much obliged if you could provide the steps. Then, if I understanding correctly, when I take the picture the camera actually actuates the aperture to the f stop I have set the dial on the lens to?

Auto ISO has nothing to do with stop-down metering AFAIK. Here are the steps you need to follow in order to get it to work:

https://www.pentaxforums.com/forums/pentax-beginners-corner-q/110658-using-ma...x-dslrs-f.html

Not a Number · 12-12-2012, 03:53 AM

Originally posted by rad291

i_trax, I am having trouble getting a non A series manual Takumar to stop down. I was told if I turn off the auto iso that would allow the camera to down stop when the picture is taken. Trouble is that having done a fair amount of looking, I have not been able to find out how to turn off auto iso. Would be much obliged if you could provide the steps. Then, if I understanding correctly, when I take the picture the camera actually actuates the aperture to the f stop I have set the dial on the lens to?

Just select an ISO speed setting other than "Auto".

Screw mount lenses will not auto-stop down on any Pentax K-mount body. You have to manually stop them down. To do this the auto/man switch (if there is one) should be set to "Man". You can use this to pre-set your f-stop and then go wide open to focus/compose by switching it to "Auto". Metering and exposure should be done with the switch set to "Man".

07-28-2012, 05:12 AM	#1
i_trax Loyal Site Supporter Join Date: Jan 2011 Location: Perth Western Australia Photos: Gallery \| Albums Posts: 2,621	ISO AUTO in M and the first impressions In K-30 there is a surprising option in M, you can set ISO to AUTO but Green Button will not perform Stop Down metering with manual lenses. After downloading the pdf manual I have discovered that: "If the mode dial is set to M when the sensitivity is set to [ISO AUTO] , the camera operates in TAv mode." Turning the LCD off is a bit fiddly, you can not just toggle INFO button like you could on Q, K-x,K-5&K-7, it requires few more steps. Magnifying in Live View is again a bit confusing, all those matters could be easily fixed with firmware update. Camera is well build but it feels much more like K-x/r than K-5/7, IMO the MENU button is too close to WB ( four-way controller) , I keep entering the MENU instead of selecting the options but I am pretty sure I will get use to it. It should definitely be supplied with AA adaptor as a standard accessory.I had plenty Eneloops ready to go, I had to wait for hourd for the charger to charge the supplied rechargeable instead, before I could turn it on. My AA adaptor on the back order. Nevertheless K-30 is an another example of excellent Pentax engineering indeed.

07-28-2012, 10:32 PM	#2
i_trax Loyal Site Supporter Join Date: Jan 2011 Location: Perth Western Australia Photos: Gallery \| Albums Posts: 2,621 Original Poster	and a few photos with cat Lily and DA18-250 http://www.flickr.com/photos/itrax/sets/72157630797782022/detail/ Last edited by i_trax; 07-28-2012 at 10:38 PM. Reason: picture upload did not work

12-11-2012, 11:15 PM	#5
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,595	Originally posted by rad291 i_trax, I am having trouble getting a non A series manual Takumar to stop down. I was told if I turn off the auto iso that would allow the camera to down stop when the picture is taken. Trouble is that having done a fair amount of looking, I have not been able to find out how to turn off auto iso. Would be much obliged if you could provide the steps. Then, if I understanding correctly, when I take the picture the camera actually actuates the aperture to the f stop I have set the dial on the lens to? Auto ISO has nothing to do with stop-down metering AFAIK. Here are the steps you need to follow in order to get it to work: https://www.pentaxforums.com/forums/pentax-beginners-corner-q/110658-using-ma...x-dslrs-f.html Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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07-29-2012, 11:39 AM	#3
Fogel70 Pentaxian Join Date: Sep 2009 Location: Stockholm, Sweden Photos: Albums Posts: 3,062	I'm not sure it is a good or bad thing that it's possible to use auto-ISO i M-mode when there is TAv mode on K30. And as exposure compensation is not available in M-mode, it is not as flexible as TAv-mode. So I might be a little confusing.

12-11-2012, 11:00 PM	#4
rad291 Inactive Account Join Date: Dec 2012 Posts: 18	Originally posted by i_trax In K-30 there is a surprising option in M, you can set ISO to AUTO but Green Button will not perform Stop Down metering with manual lenses. After downloading the pdf manual I have discovered that: "If the mode dial is set to M when the sensitivity is set to [ISO AUTO] , the camera operates in TAv mode." Turning the LCD off is a bit fiddly, you can not just toggle INFO button like you could on Q, K-x,K-5&K-7, it requires few more steps. Magnifying in Live View is again a bit confusing, all those matters could be easily fixed with firmware update. Camera is well build but it feels much more like K-x/r than K-5/7, IMO the MENU button is too close to WB ( four-way controller) , I keep entering the MENU instead of selecting the options but I am pretty sure I will get use to it. It should definitely be supplied with AA adaptor as a standard accessory.I had plenty Eneloops ready to go, I had to wait for hourd for the charger to charge the supplied rechargeable instead, before I could turn it on. My AA adaptor on the back order. Nevertheless K-30 is an another example of excellent Pentax engineering indeed. i_trax, I am having trouble getting a non A series manual Takumar to stop down. I was told if I turn off the auto iso that would allow the camera to down stop when the picture is taken. Trouble is that having done a fair amount of looking, I have not been able to find out how to turn off auto iso. Would be much obliged if you could provide the steps. Then, if I understanding correctly, when I take the picture the camera actually actuates the aperture to the f stop I have set the dial on the lens to?

12-12-2012, 03:53 AM	#6
Not a Number Moderator Join Date: Mar 2012 Location: Venice, CA Posts: 10,526	Originally posted by rad291 i_trax, I am having trouble getting a non A series manual Takumar to stop down. I was told if I turn off the auto iso that would allow the camera to down stop when the picture is taken. Trouble is that having done a fair amount of looking, I have not been able to find out how to turn off auto iso. Would be much obliged if you could provide the steps. Then, if I understanding correctly, when I take the picture the camera actually actuates the aperture to the f stop I have set the dial on the lens to? Just select an ISO speed setting other than "Auto". Screw mount lenses will not auto-stop down on any Pentax K-mount body. You have to manually stop them down. To do this the auto/man switch (if there is one) should be set to "Man". You can use this to pre-set your f-stop and then go wide open to focus/compose by switching it to "Auto". Metering and exposure should be done with the switch set to "Man".