Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
09-12-2013, 01:08 AM   #1
New Member




Join Date: Jul 2013
Posts: 6
Very high ISO needed

Just back from holiday in Spain, where I found that even in bright conditions I was having to use very high ISO values. In outside shots, in aperture priority, I could never get below 320 at f10. In inside shots in churches - not that dim - I was having to use 8000, often much higher, and the widest aperture while the rest of the group were quite happily getting reasonable images on phones and point-and-shoots. Predictably I've ended up with poor, noisy shots. I've not used the camera much before, a first version K5, and hadn't had a problem before. I'm not aware of changing anything significant in the settings, the lenses are the same. Any suggestions appreciated.

09-12-2013, 02:31 AM   #2
Pentaxian




Join Date: Jun 2009
Location: GMT +10
Photos: Albums
Posts: 10,828
Do you have a filter on your lens?
Have you got your exposure compensation (EV) setting permanently set on something weird?

I'd suggest resetting all your custom camera settings to the camera defaults and try again (press the Menu button in Capture mode, then Setup menu, tab 3, and choose 'Reset'). Just to make sure you haven't made some strange adjustments to exposure compensation, auto-ISO or anything else.
09-12-2013, 03:53 AM   #3
Pentaxian
JinDesu's Avatar

Join Date: Jun 2011
Location: New York City
Photos: Gallery
Posts: 5,626
What settings were you using, exactly? Can you post a picture that has the EXIF to show us?
09-12-2013, 06:50 AM   #4
New Member




Join Date: Jul 2013
Posts: 6
Original Poster
JinDesu - I'm new to the forum, and not sure how to post a picture with EXIF. To give you some sense of the problem, I took around 2000 shots on holiday. Most were in fairly strong daylight, but only 50 had ISOs below 320. Lower ISOs gave me unusable shutter speeds. The camera was set to +0.3 EV compensation, just like it always has been - in the past I've found that otherwise it under-exposes. Thank for your help.

09-12-2013, 06:52 AM   #5
New Member




Join Date: Jul 2013
Posts: 6
Original Poster
QuoteOriginally posted by rawr Quote
Do you have a filter on your lens?
Have you got your exposure compensation (EV) setting permanently set on something weird?

I'd suggest resetting all your custom camera settings to the camera defaults and try again (press the Menu button in Capture mode, then Setup menu, tab 3, and choose 'Reset'). Just to make sure you haven't made some strange adjustments to exposure compensation, auto-ISO or anything else.
rawr - thanks for your interest. The camera was set to +0.3 EV as always, otherwise it under-exposes, and no filter. I'll try the reset to defaults as you suggest - but first I'll wait and see if anyone suggests a particular menu setting that I might have screwed up.
09-12-2013, 07:02 AM   #6
Pentaxian
JinDesu's Avatar

Join Date: Jun 2011
Location: New York City
Photos: Gallery
Posts: 5,626
To consider a few things - F10 is pretty stopped down. Usually when I'm shooting in the city around noontime, F8 will give me 1/100-1/250s with bright sunny areas. F10 is about 2/3 stops darker so you should be seeing shutter speeds between 1/60-1/150s. If you are using any lens that is longer than 50mm, the camera is likely trying to force the shutter speed to be 1/(2xFL), so at least 1/100 or higher - which means your ISO will increase.

So that might be part of the reason why your ISO is so high - and why I wanted to check your EXIF info to see what shutter speeds you were getting and what exposure the image is showing.

Do you have a Flickr? I think you can just upload the image to this thread in the Advanced Reply function, but I'm not sure if there is a required post count before you can do that.
09-12-2013, 07:17 AM   #7
Site Supporter
Sandy Hancock's Avatar

Join Date: Feb 2012
Location: Adelaide Hills, South Australia
Photos: Gallery | Albums
Posts: 5,718
Anything beyond f/8.0 is pretty stopped down. I rarely go beyond that for hand-held shots, and only for quite specific purposes.
Anything below ISO 3200 is fair game with the K-5. 320 is nothing; I have commercially published shots on the web at ISO 25600.
I typically under-expose my shots by 2/3 to 1 EV. It is much easier to pull details from shadows in K-5 RAW files than it is to recover blown highlights.
09-12-2013, 07:27 AM   #8
Site Supporter




Join Date: Mar 2009
Location: Gladys, Virginia
Photos: Gallery
Posts: 16,217
First of all, I shoot at f4 standardly, if I can -- f10 is pretty stopped down (even shooting landscapes, I seldom go narrower than f8). Second, the filter question could be on the money. Off brand filters can drop your exposure by a stop, making you need higher iso than usual.

I guess focal length would play a factor too. If you are using a longer focal length like 200mm, say, the camera will try to keep a shutter speed of 1/300 sec.

09-12-2013, 07:55 AM   #9
New Member




Join Date: Jul 2013
Posts: 6
Original Poster
Thanks to all. My problem is that the behaviour of the camera seems very different. Last year in Morocco - similar light situations, same lens (DA18-135), similar focal lengths (usually less than 50), same EV compensation - I was shooting outside at 200-400 ISO routinely and never above 6400 inside, often lower. Using exactly the same approach to shooting, with similar aperture settings, in Spain I could rarely get below 1000 ISO outside and was usually above 10000 inside.
09-12-2013, 08:08 AM   #10
Pentaxian
JinDesu's Avatar

Join Date: Jun 2011
Location: New York City
Photos: Gallery
Posts: 5,626
Then something must be different about the shutter speeds - if the light condition is the same. Alternatively, the filter (or possibly even the lens) is somehow reducing the light reaching the sensor. If you have similar pictures from last year and this recent event, please post them and we'll help if possible.

Also, do you have any other lenses?
09-12-2013, 08:20 AM   #11
New Member




Join Date: Jul 2013
Posts: 6
Original Poster
JinDesu - for some of the inside shots I was using a recently purchased DA50 lens. With this wide open at f1.8 I couldn't get below ISO 6400, for a shutter speed of 1/100.
09-12-2013, 03:43 PM   #12
Senior Member
Action Jackson's Avatar

Join Date: Jun 2011
Location: Markham, Ontario, CANADA
Posts: 243
When you turn it on, and press 'INFO' twice, what is the ISO range that you see?
09-12-2013, 04:00 PM   #13
Pentaxian
JinDesu's Avatar

Join Date: Jun 2011
Location: New York City
Photos: Gallery
Posts: 5,626
QuoteOriginally posted by jwripple Quote
JinDesu - for some of the inside shots I was using a recently purchased DA50 lens. With this wide open at f1.8 I couldn't get below ISO 6400, for a shutter speed of 1/100.
Do the images come out exposed correctly? Do you have a sample shot?
09-13-2013, 01:01 AM   #14
New Member




Join Date: Jul 2013
Posts: 6
Original Poster
QuoteOriginally posted by Action Jackson Quote
When you turn it on, and press 'INFO' twice, what is the ISO range that you see?
Action Jackson - ISO Auto 200 - 8000. JinDesu - the images are correctly exposed.
09-16-2013, 05:30 AM   #15
Site Supporter
savoche's Avatar

Join Date: Jun 2011
Location: Lowlands of Norway
Posts: 8,666
As for how to post an example image: https://www.pentaxforums.com/forums/post-your-photos/6-how-upload-photos-begi...tart-here.html
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
aperture, camera, dslr, iso, k-5, k-5 ii, k-5 iis, k5, pentax k-5, shots
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
People K-5 high ISO... how high can we really go... igor Post Your Photos! 2 03-24-2012 01:10 AM
High Quality Photo Paper help needed plmuzikmaster Digital Processing, Software, and Printing 5 10-03-2011 09:00 PM
Example of AF, DR, high ISO and high shutter speed on K-5 benisona Pentax DSLR Discussion 17 11-30-2010 02:25 PM
K-7 high ISO vs K20D high ISO supa007 Pentax DSLR Discussion 72 05-10-2010 04:24 PM
Very High ISO - the good, the great, the not so good laissezfaire Post Your Photos! 7 09-01-2009 08:13 PM



All times are GMT -7. The time now is 09:38 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top