What's going on? K5, Av and auto-iso

drec · 09-06-2011, 06:49 AM

Hi all,

Just got a K5. Quick question, in aperture-priority, the auto-iso is not engaged, though I have engaged it in the menus. Is this correct? Auto-iso only seems to be working for me in TAv. As I generally only shoot in Av, this is a nuisance.

How would I correct it so that auto-iso is engaged in Av? Auto-Iso worked, kinda, in my K100D Super, and certainly in my Kx.

Thanks,
André

-Spooky- · 09-06-2011, 06:52 AM

Set the camera to Av Mode, and while in Av mode, press the iso button followed by the green button. That activates auto iso.

Ivor K Ecks · 09-06-2011, 06:54 AM

Whilst in av mode press the iso button then the green button.

Peter

-Spooky- · 09-06-2011, 06:54 AM

Any time you are in auto iso, you can override that feature by pressing the iso button and using the rear wheel to set the iso to whatever you want it to be. The iso button followed by the green button get you back to auto iso.

Francis · 09-06-2011, 06:58 AM

... and I just learned something new! I always wondered why it never changed from the last setting I set it to...

RioRico · 09-06-2011, 07:32 AM

For the same adjustments on the K20D (and probably K10D too): hold down the OK button; then press the Green button to transition to/from auto-ISO, or spin the rear e-dial to adjust ISO level.

Rupert · 09-06-2011, 07:57 AM

I didn't know that! Thanks!
Tav is my most used mode.......just a great way to quickly control both speed and aperture. Love it!
Regards!

drec · 09-06-2011, 09:38 AM

Thanks all!

pentax user · 06-18-2012, 07:59 AM

does the program line determine what auto iso the camera choose?
or the iso parameter

vonBaloney · 06-18-2012, 08:43 AM

Originally posted by pentax user

does the program line determine what auto iso the camera choose?
or the iso parameter

There is an "iso-line" also -- go to the status screen (where you can adjust iso range with the dials) and click OK on that and it will go to an separate screen showing just the auto-iso range plus a preference choice for slow-normal-fast auto-iso...

**i_trax** · 06-18-2012, 08:49 AM

Originally posted by pentax user

does the program line determine what auto iso the camera choose?
or the iso parameter

very good question.
+ is there anyway to have auto ISO available while using manual KM lenses in M mode?

vonBaloney · 06-18-2012, 08:52 AM

Originally posted by i_trax

very good question.
+ is there anyway to have auto ISO available while using manual KM lenses in M mode?

Not in M mode. This is where m42s have an advantage since they work in Av mode. (Or Ms if you only shoot wide-open.)

**i_trax** · 06-18-2012, 09:19 AM

so there is really NO way to have auto ISO in M mode???
well, I did look everywhere and expected it but still, disappointed!
I do have a lot of M42 lenses ( can use in Av) but still have some old fast zooms in K , bugger!

vonBaloney · 06-18-2012, 10:07 AM

Originally posted by i_trax

so there is really NO way to have auto ISO in M mode???
well, I did look everywhere and expected it but still, disappointed!
I do have a lot of M42 lenses ( can use in Av) but still have some old fast zooms in K , bugger!

M means manual, no auto anything. This is a result of the crippled K-mount the bodies now have -- even though the K1000 could do it, the body no longer knows what the aperture is set at with K & M lenses so auto is not possible. You can use the hack to fool it into thinking it is a 'A' lens, but as noted the linkage of A & M lenses is not the same so it still will not set aperture properly, and you have to fool it some more with EV comp, and it sounds like it is not a linear adjustment?

So we are left with green button metering, and you can do some quick calculations to adjust ISO to get shutter speed you desire.

FrancisK7 · 06-18-2012, 10:09 AM

Originally posted by drec

Hi all,

Just got a K5. Quick question, in aperture-priority, the auto-iso is not engaged, though I have engaged it in the menus. Is this correct? Auto-iso only seems to be working for me in TAv. As I generally only shoot in Av, this is a nuisance.

How would I correct it so that auto-iso is engaged in Av? Auto-Iso worked, kinda, in my K100D Super, and certainly in my Kx.

Thanks,
André

Salut André,

I shot in Av for years but I find TAv to be very cool as well. Do a few shoots in the mode and see how things go. I like it better nowadays!

09-06-2011, 06:49 AM	#1
drec Forum Member Join Date: May 2009 Location: Toronto Posts: 53	What's going on? K5, Av and auto-iso Hi all, Just got a K5. Quick question, in aperture-priority, the auto-iso is not engaged, though I have engaged it in the menus. Is this correct? Auto-iso only seems to be working for me in TAv. As I generally only shoot in Av, this is a nuisance. How would I correct it so that auto-iso is engaged in Av? Auto-Iso worked, kinda, in my K100D Super, and certainly in my Kx. Thanks, André

06-18-2012, 08:49 AM	#11
i_trax Loyal Site Supporter Join Date: Jan 2011 Location: Perth Western Australia Photos: Gallery \| Albums Posts: 2,621	Auto ISO Originally posted by pentax user does the program line determine what auto iso the camera choose? or the iso parameter very good question. + is there anyway to have auto ISO available while using manual KM lenses in M mode?

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09-06-2011, 06:52 AM	#2
-Spooky- Senior Member Join Date: Mar 2011 Posts: 140	Set the camera to Av Mode, and while in Av mode, press the iso button followed by the green button. That activates auto iso.

09-06-2011, 06:54 AM	#3
Ivor K Ecks Senior Member Join Date: Mar 2010 Location: Sydney Photos: Albums Posts: 294	Whilst in av mode press the iso button then the green button. Peter

09-06-2011, 06:58 AM	#5
Francis Senior Member Join Date: May 2010 Location: Hilversum Photos: Gallery Posts: 215	... and I just learned something new! I always wondered why it never changed from the last setting I set it to...

09-06-2011, 07:32 AM	#6
RioRico Veteran Member Join Date: Jun 2008 Location: Limbo, California Posts: 11,263	For the same adjustments on the K20D (and probably K10D too): hold down the OK button; then press the Green button to transition to/from auto-ISO, or spin the rear e-dial to adjust ISO level.

09-06-2011, 07:57 AM	#7
Rupert Veteran Member Join Date: Sep 2006 Location: Texas Photos: Gallery \| Albums Posts: 25,123	I didn't know that! Thanks! Tav is my most used mode.......just a great way to quickly control both speed and aperture. Love it! Regards!

09-06-2011, 09:38 AM	#8
drec Forum Member Join Date: May 2009 Location: Toronto Posts: 53 Original Poster	Thanks all!

06-18-2012, 07:59 AM	#9
pentax user Forum Member Join Date: Oct 2010 Posts: 85	does the program line determine what auto iso the camera choose? or the iso parameter

06-18-2012, 08:43 AM	#10
vonBaloney Pentaxian Join Date: Oct 2011 Location: Albuquerque, NM Posts: 6,029	Originally posted by pentax user does the program line determine what auto iso the camera choose? or the iso parameter There is an "iso-line" also -- go to the status screen (where you can adjust iso range with the dials) and click OK on that and it will go to an separate screen showing just the auto-iso range plus a preference choice for slow-normal-fast auto-iso...

06-18-2012, 08:52 AM	#12
vonBaloney Pentaxian Join Date: Oct 2011 Location: Albuquerque, NM Posts: 6,029	Originally posted by i_trax very good question. + is there anyway to have auto ISO available while using manual KM lenses in M mode? Not in M mode. This is where m42s have an advantage since they work in Av mode. (Or Ms if you only shoot wide-open.)

06-18-2012, 09:19 AM	#13
i_trax Loyal Site Supporter Join Date: Jan 2011 Location: Perth Western Australia Photos: Gallery \| Albums Posts: 2,621	so there is really NO way to have auto ISO in M mode??? well, I did look everywhere and expected it but still, disappointed! I do have a lot of M42 lenses ( can use in Av) but still have some old fast zooms in K , bugger!

06-18-2012, 10:07 AM	#14
vonBaloney Pentaxian Join Date: Oct 2011 Location: Albuquerque, NM Posts: 6,029	Originally posted by i_trax so there is really NO way to have auto ISO in M mode??? well, I did look everywhere and expected it but still, disappointed! I do have a lot of M42 lenses ( can use in Av) but still have some old fast zooms in K , bugger! M means manual, no auto anything. This is a result of the crippled K-mount the bodies now have -- even though the K1000 could do it, the body no longer knows what the aperture is set at with K & M lenses so auto is not possible. You can use the hack to fool it into thinking it is a 'A' lens, but as noted the linkage of A & M lenses is not the same so it still will not set aperture properly, and you have to fool it some more with EV comp, and it sounds like it is not a linear adjustment? So we are left with green button metering, and you can do some quick calculations to adjust ISO to get shutter speed you desire.

06-18-2012, 10:09 AM	#15
FrancisK7 Veteran Member Join Date: Sep 2007 Location: Montreal Photos: Gallery Posts: 474	Originally posted by drec Hi all, Just got a K5. Quick question, in aperture-priority, the auto-iso is not engaged, though I have engaged it in the menus. Is this correct? Auto-iso only seems to be working for me in TAv. As I generally only shoot in Av, this is a nuisance. How would I correct it so that auto-iso is engaged in Av? Auto-Iso worked, kinda, in my K100D Super, and certainly in my Kx. Thanks, André Salut André, I shot in Av for years but I find TAv to be very cool as well. Do a few shoots in the mode and see how things go. I like it better nowadays!