Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
03-19-2012, 07:52 PM   #1
Senior Member
mojoe_24's Avatar

Join Date: Nov 2010
Posts: 218
Question about Flashes

Would I be able to take it off the camera and have it flash when I want or does it require the camera to be used?

03-19-2012, 07:56 PM   #2
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 43,140
Some flashes support wireless release and all can be used with a cable release. You can also set up a remote trigger. Which flash do you have in mind?

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:

03-19-2012, 08:53 PM   #3
Pentaxian




Join Date: Feb 2009
Location: Alameda, CA
Posts: 3,198
QuoteOriginally posted by mojoe_24 Quote
Would I be able to take it off the camera and have it flash when I want or does it require the camera to be used?
Most, if not all, flashes have a "test" button. You can fire the flash any time by manually pushing this button.

Not sure if I understand your question correctly though.
03-21-2012, 07:26 PM   #4
Senior Member
mojoe_24's Avatar

Join Date: Nov 2010
Posts: 218
Original Poster
To clarify. I like messing around with long exposure at night. Would I be able to have the camera's shutter stay open and then use the flash (off the camera) to light something? And I'm not looking at any specifically right now. Most likely it'd be a cheaper one though.

03-21-2012, 08:19 PM   #5
Pentaxian




Join Date: Feb 2009
Location: Alameda, CA
Posts: 3,198
Do a search for "painting with flash."

This is a good article: Painting with Flash.

Great photos: Harold Ross Fine Art
03-22-2012, 03:33 AM   #6
Pentaxian
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 15,400
QuoteOriginally posted by mojoe_24 Quote
To clarify. I like messing around with long exposure at night. Would I be able to have the camera's shutter stay open and then use the flash (off the camera) to light something? And I'm not looking at any specifically right now. Most likely it'd be a cheaper one though.
It works just fine, just set the flash manually for the exposure you want and push the test button.

But I will warn you now, be very careful (with respect to your images) as to where you physically stand, so that you do not block any of the light reaching the camera, otherwise you will get a lot of invisible people in your shots, not shadows or silhouettes but transparent human form outlines
03-22-2012, 04:52 AM   #7
Veteran Member
mtansley's Avatar

Join Date: Oct 2008
Location: Ajax, Ontario, Canada
Photos: Gallery
Posts: 1,139
QuoteOriginally posted by Lowell Goudge Quote
But I will warn you now, be very careful (with respect to your images) as to where you physically stand, so that you do not block any of the light reaching the camera, otherwise you will get a lot of invisible people in your shots, not shadows or silhouettes but transparent human form outlines

Presumably, you'd need to trigger the camera, walk into frame, fire flash, walk out of frame and then stop camera.

Why wouldn't this give a silhouette, or would the background show through but only if you trigger the flash a second time.

I'm not questioning you (I guess I am really), it just sounds like rather an interesting thing to attempt, in addition to the OP wanting to paint with light.
03-22-2012, 06:08 AM   #8
Pentaxian
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 15,400
QuoteOriginally posted by mtansley Quote
Presumably, you'd need to trigger the camera, walk into frame, fire flash, walk out of frame and then stop camera.

Why wouldn't this give a silhouette, or would the background show through but only if you trigger the flash a second time.

I'm not questioning you (I guess I am really), it just sounds like rather an interesting thing to attempt, in addition to the OP wanting to paint with light.
I am assuming that you are doing a very long exposure, so you use bulb, with the lens stopped down, and relitively low ISO.

I did this once with film, with about a 5 minute exposure, and walked about in the frame with a flash triggering it to light specific points.

The problem is, that there is some ambient light on the whole scene, and also stray light from the flash, that illuminates the scene, and you end up, if you are not careful, with transparent silhouettes, because the flashes are relitively high intensity but the ambient light, or stray light from a second flash, illuminates the scene behind the silhouette, but to a different level than the surrounding areas.

As i said, you generate transparent human forms in the image, unless you really plan out your exposure pattern.

I think in general the most critical thing is to always use side lighting, , i.e. you are never between the cone of light prijected by the flash and the lens, unless you want to creat the invisible man


Last edited by Lowell Goudge; 05-28-2012 at 05:28 AM.
03-22-2012, 06:15 AM   #9
Veteran Member
mtansley's Avatar

Join Date: Oct 2008
Location: Ajax, Ontario, Canada
Photos: Gallery
Posts: 1,139
QuoteOriginally posted by Lowell Goudge Quote
I am assuming that you are doing a very long exposure, so you use bulb, with the lens stopped down, and relitively low ISO.

I did this once with film, with about a 5 minute exposure, and walked about in the frame with a flash triggering it to light specific points.

The problem is, that there is some ambient light on the whole scene, and also stray light from the flash, that illuminates the scene, and you end up, if you are not careful, with transparent silhouettes, because the flashes are relitively high intensity but the ambient light, or stray light from a second flash, illuminates the scene behind the silhouette, but to a different level than the surrounding areas.

As i said, you generate transparent human forms in the image, unless you really plan out your exposure pattern.

I think in general the most critical thing is to always use side lighting, , i.e. you are never between the cone of light prijected by the flash and the lens, unless you want to creat the invisible man
Thanks for the details. Most interesting.

Actually, my intent WAS to try to create an invisible man, just the opposite to what you intended.

Makes photography all the more interesting, doesn't it.
03-22-2012, 06:53 AM   #10
Pentaxian
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 15,400
QuoteOriginally posted by mtansley Quote
Thanks for the details. Most interesting.

Actually, my intent WAS to try to create an invisible man, just the opposite to what you intended.

Makes photography all the more interesting, doesn't it.
If you want to create the invisible man, then I would suggest 2 flash pulses, one of the scene without you in it, set exposure for about 50% or -1-2 stops under exopsed, and then take a second flash with the flash hidden(to the camera) by your invisible man illuminating the scene again. it should work out nicely
03-22-2012, 09:40 AM   #11
Veteran Member
mtansley's Avatar

Join Date: Oct 2008
Location: Ajax, Ontario, Canada
Photos: Gallery
Posts: 1,139
QuoteOriginally posted by Lowell Goudge Quote
If you want to create the invisible man, then I would suggest 2 flash pulses, one of the scene without you in it, set exposure for about 50% or -1-2 stops under exopsed, and then take a second flash with the flash hidden(to the camera) by your invisible man illuminating the scene again. it should work out nicely
Thank you.

I'll give that a try.

Nice to do something different and interesting WITHOUT using Photoshop or the computer generally.
03-22-2012, 01:37 PM   #12
Pentaxian
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 15,400
QuoteOriginally posted by mtansley Quote
Thank you.

I'll give that a try.

Nice to do something different and interesting WITHOUT using Photoshop or the computer generally.
what do they call it? Old School

do post the results, I'd love to see them.
03-22-2012, 02:00 PM   #13
Veteran Member
mtansley's Avatar

Join Date: Oct 2008
Location: Ajax, Ontario, Canada
Photos: Gallery
Posts: 1,139
QuoteOriginally posted by Lowell Goudge Quote
what do they call it? Old School

do post the results, I'd love to see them.
Maybe Old School, it can also be called "I don't know Photoshop too well!!"

When I get something moderately successful I'll gladly post the results for you.
03-22-2012, 02:24 PM   #14
Pentaxian
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 15,400
QuoteOriginally posted by mtansley Quote
Maybe Old School, it can also be called "I don't know Photoshop too well!!" :
since I work with computers all day, I actually shoot jpeg because I simply hate spending any more time in front of a monitor than necessary.

This is a fun experiment
03-22-2012, 02:36 PM   #15
Senior Member
mojoe_24's Avatar

Join Date: Nov 2010
Posts: 218
Original Poster
Thanks. Any recommendations on cheap, decent flashes?
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, dslr, photography
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
studio strobes and hs flashes question piskota Flashes, Lighting, and Studio 9 09-01-2011 01:30 PM
Two flashes and one hotshoe...sync cable question... PentaxPZ Flashes, Lighting, and Studio 6 09-15-2009 02:03 PM
Quick question about flashes: AF 360 triggering Sigma 530 Andi Lo Flashes, Lighting, and Studio 3 07-28-2009 08:24 PM
Question for strobist: Ok to use different types of Flashes? SuperAkuma Flashes, Lighting, and Studio 19 07-12-2009 05:42 AM
What other camera co's flashes can use the same addons as my Pentax flashes? Grimlock Flashes, Lighting, and Studio 3 08-22-2008 05:39 PM



All times are GMT -7. The time now is 04:00 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