Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
08-24-2019, 10:26 PM   #1
New Member




Join Date: Dec 2010
Posts: 10
Question about live view

when using live view, is there a noticeable delay to when the screen updates?

On my k5iis, it takes about a second for the screen to update when I use live view. Like when I move to look at something else, thereís a delayed reaction to what appears on the screen. I find myself avoiding it but was hoping that itís better on the k1

08-24-2019, 10:30 PM   #2
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 48,887
QuoteOriginally posted by tbguy Quote
when using live view, is there a noticeable delay to when the screen updates?

On my k5iis, it takes about a second for the screen to update when I use live view. Like when I move to look at something else, there’s a delayed reaction to what appears on the screen. I find myself avoiding it but was hoping that it’s better on the k1
There is no significant display latency (on either camera). What you're likely seeing is the SR system trying to stabilize the frame.

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, buy your photo gear from our affiliates, Adorama, B&H Photo, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

08-24-2019, 10:40 PM   #3
New Member




Join Date: Dec 2010
Posts: 10
Original Poster
That was it! Thanks for pointing that out.
08-25-2019, 01:16 AM   #4
Pentaxian
Wasp's Avatar

Join Date: Mar 2017
Location: Pretoria
Photos: Gallery
Posts: 1,060
I have noticed a delay with my mirrorless Samsungs (NX1 and NX100) when taking moving the camera from pointing downwards in a shaded area to a scene in bright sunlight. The live view display goes from completely overexposed to normal. It takes a second or three. I am not sure if it is the processor, sensor or the display that causes the delay. Very annoying though, and it sometimes means a missed shot on the street. I haven't seen this on my Pentax K-x but I seldomly use it for street photography.

Of course, in an SLR this never happens, but I have wondered about it. If the sensor needs time to react to the sudden change light, surely it would lead to wrong exposures? I haven't seen any complaints about this sort of thing ever. That rules out the sensor.

I have gotten one or two artistic/abstract shots this way, Perhaps it worth exploring further, but it would be too much like abuse of gear.

08-25-2019, 03:24 AM   #5
Pentaxian
Fogel70's Avatar

Join Date: Sep 2009
Location: Stockholm, Sweden
Photos: Albums
Posts: 2,103
QuoteOriginally posted by Wasp Quote
I have noticed a delay with my mirrorless Samsungs (NX1 and NX100) when taking moving the camera from pointing downwards in a shaded area to a scene in bright sunlight. The live view display goes from completely overexposed to normal. It takes a second or three. I am not sure if it is the processor, sensor or the display that causes the delay. Very annoying though, and it sometimes means a missed shot on the street. I haven't seen this on my Pentax K-x but I seldomly use it for street photography.
Isn't that because exposure is locked?
The viewfinder just show you what the picture would look like. It is often possible to turn off exposure preview in EVF.

My Pentax DSLR only lock exposure with half press with OVF, not in LV.
QuoteQuote:
Of course, in an SLR this never happens, but I have wondered about it. If the sensor needs time to react to the sudden change light, surely it would lead to wrong exposures? I haven't seen any complaints about this sort of thing ever. That rules out the sensor.

I have gotten one or two artistic/abstract shots this way, Perhaps it worth exploring further, but it would be too much like abuse of gear.
08-25-2019, 01:21 PM   #6
Pentaxian




Join Date: Jun 2008
Location: Idaho
Photos: Gallery
Posts: 837
Liveview uses an effective ISO (gain applied to the sensor output) which varies depending on scene conditions. Usually the lens you're using is fully open for Liveview so effective ISO has to be reduced for bright conditions to keep from washing the image out (shutter speed can't be adjusted).

This is done on the fly so when you go from a dim scene to a bright scene in Liveview, it takes a short interval for the camera to adjust the ISO which is what Wasp described. It has nothing to do with image lag and the image itself is almost an instantaneous view of what is coming through the lens. It's kind of like turning the lights on when you go to the bathroom at night - takes a few seconds for your eyes to adjust but what you're seeing isn't delayed.

Note that the ISO is returned to the dialed in value when a picture is taken at the camera calculated f-stop and shutter speed (for obvious reasons - to get the exposure right). Also if you stop the lens down for a DOF preview, the ISO is adjusted to compensate for the iris being reduced in size so the Liveview image stays about the same brightness. Sometimes this can cause flaring when coming out of DOF and the lens opens to its full extent. Still, very little if any image lag.
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!
dslr, full frame, full-frame, k-1, k1, pentax k-1, screen, view
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
K50 Exposure is much different from live view to view finder neptune Troubleshooting and Beginner Help 23 02-10-2018 09:07 PM
live view noise and smc dfa 100mm f2.8 macro lens not focusing in live view tommygunn84 Troubleshooting and Beginner Help 7 11-24-2016 08:59 PM
Typical live view humming, when not in live view. lightsource Pentax K-1 8 05-05-2016 02:20 AM
K5 Live View: Live Exposure Adjustments Visible in "M" Mode? godwinaustin Pentax K-5 6 08-13-2013 08:11 PM
View finder vs Live View on K5 II Wingincamera Pentax K-5 5 12-08-2012 03:47 PM



All times are GMT -7. The time now is 02:47 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