Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
01-23-2013, 10:35 PM   #1
Pentaxian




Join Date: Feb 2010
Location: East Bay Area
Photos: Gallery
Posts: 784
Q Shutter Setting Question

Hey guys,

New Q owner here, like many others out there with the recent discounts. I was playing around the camera using a Fotodiox K-Q mount adapter in Manual mode. I noticed that I cannot adjust the shutter speed to be slower than 2 seconds. With a regular Q lens it can go longer and also bulb mode. What am I missing here?

01-23-2013, 10:43 PM   #2
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 42,369
QuoteOriginally posted by ruggiex Quote
Hey guys,

New Q owner here, like many others out there with the recent discounts. I was playing around the camera using a Fotodiox K-Q mount adapter in Manual mode. I noticed that I cannot adjust the shutter speed to be slower than 2 seconds. With a regular Q lens it can go longer and also bulb mode. What am I missing here?
You need a leaf shutter to go slower than 2 seconds, which only the Pentax adapter has.

Adam
PentaxForums.com Webmaster (Site Usage Guide | Site Help | My Photography)



PentaxForums.com's high server and development costs are user-supported. You can help cover those 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:

01-23-2013, 11:13 PM   #3
Pentaxian




Join Date: Feb 2010
Location: East Bay Area
Photos: Gallery
Posts: 784
Original Poster
Ah ok... I'm pretty noob when it comes to mechanics of camera but why is a leaf shutter needed? Couldn't the camera simply turn off the signal to sensor after a specific amount of time? I guess I'm wondering if there's technical limitation or if it's a choice.

Last edited by ruggiex; 01-23-2013 at 11:35 PM.
01-24-2013, 01:11 AM   #4
Pentaxian




Join Date: Oct 2006
Location: Chicago suburb, IL, USA
Posts: 1,535
Hi ruggiex,

If you need longer exposures with 3rd party adapted lenses, you can use Multiple Exposure Mode, set up a 2 sec exposure, and use up to 9 exposures for a total of 18 sec. Obviously, this isn't the same as a single long exposure, but it will work for some applications.

Scott

01-24-2013, 01:48 AM   #5
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 42,369
QuoteOriginally posted by ruggiex Quote
Ah ok... I'm pretty noob when it comes to mechanics of camera but why is a leaf shutter needed? Couldn't the camera simply turn off the signal to sensor after a specific amount of time? I guess I'm wondering if there's technical limitation or if it's a choice.
I think it's more of a choice honestly, to encourage people to buy the higher-end lenses and accessories. AFAIK the only thing that the leaf shutter is required for from a technical standpoint is the high flash sync speed (I believe it goes up to 1/2000s on the Q).

Adam
PentaxForums.com Webmaster (Site Usage Guide | Site Help | My Photography)



PentaxForums.com's high server and development costs are user-supported. You can help cover those 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:

01-24-2013, 07:40 AM   #6
Pentaxian




Join Date: Feb 2010
Location: East Bay Area
Photos: Gallery
Posts: 784
Original Poster
Thanks guys.
01-24-2013, 07:45 AM   #7
Loyal Site Supporter
drougge's Avatar

Join Date: Jan 2010
Location: Malmö
Photos: Gallery
Posts: 787
QuoteOriginally posted by ruggiex Quote
Ah ok... I'm pretty noob when it comes to mechanics of camera but why is a leaf shutter needed? Couldn't the camera simply turn off the signal to sensor after a specific amount of time? I guess I'm wondering if there's technical limitation or if it's a choice.
It's a choice, but there is some motivation. Without a shutter they can't take a darkframe, and that means you get more noise. The sensor is definitely better than needing a 2s cutoff for that though, and I think it should be the photographer's choice if the noise is acceptable anyway.
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!
camera, mirrorless, mode, pentax q, pentax q10, pentax q7, q10, q7, shutter
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Q Shutter Lag? emergo Pentax Q 7 08-17-2012 07:43 AM
Camera setting too slow shutter speed Jed Mooar Troubleshooting and Beginner Help 6 08-09-2012 06:51 AM
setting Q Rusky40 Pentax DSLR Discussion 2 03-26-2012 03:39 PM
setting Q Rusky40 Troubleshooting and Beginner Help 10 09-13-2011 03:05 AM
k-x auto iso safe shutter speed setting? telly0050 Pentax DSLR Discussion 6 07-31-2011 02:30 PM



All times are GMT -7. The time now is 06:10 AM. | 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