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loafer · 07-09-2009, 02:21 PM

Hey everyone.

I created some movies testing the DOF using the aperture ring and focusing with various prime lenses that I hope some people may find interesting. The DOF tests were done at the minimum and maximum focusing distances.

The aperture ring works manually in movie mode, but you need to wait for the camera to adjust the gain for the new lighting parameters.

FA35, FA43, FA50 1.4 and lastly the FA77 were used.

Let me know if you have any questions!

Lens Movie Tests - a set on Flickr

Joseph D. · 07-09-2009, 02:38 PM

Very cool. Thanks for this. I was going to try the same thing whenever I got my K-7. (Just to try to get a handle on how to manipulate DoF with a DSLR in movie mode. Great stuff and thanks for taking the time.

Sincerely,

ll_coffee_lP · 07-09-2009, 05:18 PM

Neato!

I only briefly tried the video function with the 77ltd. Not sure if I'll use the feature much, but I'm gonna give it a go with the 10-17FE to see what I can come up with.

c[_]

loafer · 07-10-2009, 03:29 PM

Originally posted by Joseph D.

Very cool. Thanks for this. I was going to try the same thing whenever I got my K-7. (Just to try to get a handle on how to manipulate DoF with a DSLR in movie mode. Great stuff and thanks for taking the time.

Sincerely,

Thank you!

Definitely took me enough time to upload the videos.. over 7 hours to upload 1.1 gigs at 50kbps upload. :ugh:

Can't wait to go back to school to use the University's amazing fiber line.

legacyb4 · 07-10-2009, 03:38 PM

Very neat. I was wondering how video recorded at max aperture would change as focus point changed.

Obviously, shooting video at wider apertures is a totally different beast than with the P&S type of video clips and/or video cameras!

Igilligan · 07-10-2009, 03:38 PM

Thanks so much for these tests... the video mode is something I am definitely interested in.

I have a question... as you increase the aperture with each click. The initial exposure looks better, (more natural) than when the camera gains up for the new Ap, it blows out again.

Can you exp compensate or adjust metering in Video mode... It looks like a -1 would have been great.

k100d · 07-10-2009, 03:42 PM

sweet tests, thanks for posting!
i'm assuming when you say "sweet fiber line" you're not talking about the University of Waterloo in Canada

and what igilligan said above too ... would be interested ^^

kent · 07-10-2009, 03:58 PM

Great!
Thank you

loafer · 07-10-2009, 06:52 PM

Originally posted by Igilligan

Thanks so much for these tests... the video mode is something I am definitely interested in.

I have a question... as you increase the aperture with each click. The initial exposure looks better, (more natural) than when the camera gains up for the new Ap, it blows out again.

Can you exp compensate or adjust metering in Video mode... It looks like a -1 would have been great.

Yes you can, needs to be set before you start recording and can't be changed during recording.

I'll admit I was at +1 exposure compensation for these videos.. I don't know why but I thought it would be a good idea at the time.....

Interesting enough though - you can set AE-L before recording and then turn it off during. That is what I did at the 00:44 mark (countdown) in the following video: First K-7 Movie on Flickr - Photo Sharing!

loafer · 07-10-2009, 06:53 PM

Originally posted by k100d

sweet tests, thanks for posting!
i'm assuming when you say "sweet fiber line" you're not talking about the University of Waterloo in Canada

and what igilligan said above too ... would be interested ^^

lol, yeah indeed I am talking about the University of Waterloo.. unfortunately, I'll have to leave beautiful BC ....

creampuff · 07-10-2009, 07:18 PM

OP, good effort. This thread is definitely not for those who keep harping that they don't need video. I feel it opens up a lot of new creative possibilities but I'm probably the minority here.

**smigol** · 07-11-2009, 08:03 PM

Thanks for these videos! It's good to see how the aperture changes cause the camera to change the exposure automagically. I'm interested to see what people make of the camera capability.

Any idea of how the video function uses up the battery charge?

I've added you on flickr as a contact to see what else you'll come up with over time.

Martytoof · 07-12-2009, 12:00 PM

Originally posted by creampuff

OP, good effort. This thread is definitely not for those who keep harping that they don't need video.

Dang, I still don't feel I need video but I'm definitely jealous of the ability

Haven't even received my first Pentax in the mail and already I'm lusting after the K7

k100d · 07-13-2009, 07:23 AM

Originally posted by loafer

lol, yeah indeed I am talking about the University of Waterloo.. unfortunately, I'll have to leave beautiful BC ....

where in waterloo is there a sweet fiber line?! the school internet was such a slug

digitaddict · 07-13-2009, 08:51 AM

Hello
I find your video test verry interresting.
I tink its a great way for new photographer to understand focus VS DOF....
I must add... Im amazed by the thin DOF of the 77 ltd.
Thanks for sharing.
marc

07-09-2009, 02:21 PM	#1
loafer Forum Member Join Date: Nov 2007 Location: Victoria/Waterloo Posts: 82	K-7 Movie tests with 4 different primes Hey everyone. I created some movies testing the DOF using the aperture ring and focusing with various prime lenses that I hope some people may find interesting. The DOF tests were done at the minimum and maximum focusing distances. The aperture ring works manually in movie mode, but you need to wait for the camera to adjust the gain for the new lighting parameters. FA35, FA43, FA50 1.4 and lastly the FA77 were used. Let me know if you have any questions! Lens Movie Tests - a set on Flickr

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07-09-2009, 02:38 PM	#2
Joseph D. Forum Member Join Date: Sep 2006 Location: Vancouver, B.C. Posts: 52	Very cool. Thanks for this. I was going to try the same thing whenever I got my K-7. (Just to try to get a handle on how to manipulate DoF with a DSLR in movie mode. Great stuff and thanks for taking the time. Sincerely,

07-09-2009, 05:18 PM	#3
ll_coffee_lP Inactive Account Join Date: Jan 2008 Location: Ontario, Canada Posts: 1,972	Neato! I only briefly tried the video function with the 77ltd. Not sure if I'll use the feature much, but I'm gonna give it a go with the 10-17FE to see what I can come up with. c[_]

07-10-2009, 03:29 PM	#4
loafer Forum Member Join Date: Nov 2007 Location: Victoria/Waterloo Posts: 82 Original Poster	Originally posted by Joseph D. Very cool. Thanks for this. I was going to try the same thing whenever I got my K-7. (Just to try to get a handle on how to manipulate DoF with a DSLR in movie mode. Great stuff and thanks for taking the time. Sincerely, Thank you! Definitely took me enough time to upload the videos.. over 7 hours to upload 1.1 gigs at 50kbps upload. :ugh: Can't wait to go back to school to use the University's amazing fiber line.

07-10-2009, 03:38 PM	#5
legacyb4 Inactive Account Join Date: Sep 2008 Location: Tri-Cities, British Columbia Photos: Gallery Posts: 1,784	Very neat. I was wondering how video recorded at max aperture would change as focus point changed. Obviously, shooting video at wider apertures is a totally different beast than with the P&S type of video clips and/or video cameras!

07-10-2009, 03:38 PM	#6
Igilligan Guest	Thanks so much for these tests... the video mode is something I am definitely interested in. I have a question... as you increase the aperture with each click. The initial exposure looks better, (more natural) than when the camera gains up for the new Ap, it blows out again. Can you exp compensate or adjust metering in Video mode... It looks like a -1 would have been great.

07-10-2009, 03:42 PM	#7
k100d Veteran Member Join Date: Feb 2008 Location: Toronto Posts: 3,911	sweet tests, thanks for posting! i'm assuming when you say "sweet fiber line" you're not talking about the University of Waterloo in Canada and what igilligan said above too ... would be interested ^^

07-10-2009, 03:58 PM	#8
kent Veteran Member Join Date: May 2009 Location: Lithuania Photos: Gallery Posts: 344	Great! Thank you

07-10-2009, 06:52 PM	#9
loafer Forum Member Join Date: Nov 2007 Location: Victoria/Waterloo Posts: 82 Original Poster	Originally posted by Igilligan Thanks so much for these tests... the video mode is something I am definitely interested in. I have a question... as you increase the aperture with each click. The initial exposure looks better, (more natural) than when the camera gains up for the new Ap, it blows out again. Can you exp compensate or adjust metering in Video mode... It looks like a -1 would have been great. Yes you can, needs to be set before you start recording and can't be changed during recording. I'll admit I was at +1 exposure compensation for these videos.. I don't know why but I thought it would be a good idea at the time..... Interesting enough though - you can set AE-L before recording and then turn it off during. That is what I did at the 00:44 mark (countdown) in the following video: First K-7 Movie on Flickr - Photo Sharing!

07-10-2009, 06:53 PM	#10
loafer Forum Member Join Date: Nov 2007 Location: Victoria/Waterloo Posts: 82 Original Poster	Originally posted by k100d sweet tests, thanks for posting! i'm assuming when you say "sweet fiber line" you're not talking about the University of Waterloo in Canada and what igilligan said above too ... would be interested ^^ lol, yeah indeed I am talking about the University of Waterloo.. unfortunately, I'll have to leave beautiful BC ....

07-10-2009, 07:18 PM	#11
creampuff Veteran Member Join Date: May 2007 Location: Singapore Photos: Gallery Posts: 3,953	OP, good effort. This thread is definitely not for those who keep harping that they don't need video. I feel it opens up a lot of new creative possibilities but I'm probably the minority here.

07-11-2009, 08:03 PM	#12
smigol Site Supporter Join Date: Sep 2008 Location: Menlo Park, CA Photos: Albums Posts: 422	Thanks for these videos! It's good to see how the aperture changes cause the camera to change the exposure automagically. I'm interested to see what people make of the camera capability. Any idea of how the video function uses up the battery charge? I've added you on flickr as a contact to see what else you'll come up with over time.

07-12-2009, 12:00 PM	#13
Martytoof New Member Join Date: Jul 2009 Location: Hamilton, Ontario Posts: 14	Originally posted by creampuff OP, good effort. This thread is definitely not for those who keep harping that they don't need video. Dang, I still don't feel I need video but I'm definitely jealous of the ability Haven't even received my first Pentax in the mail and already I'm lusting after the K7

07-13-2009, 07:23 AM	#14
k100d Veteran Member Join Date: Feb 2008 Location: Toronto Posts: 3,911	Originally posted by loafer lol, yeah indeed I am talking about the University of Waterloo.. unfortunately, I'll have to leave beautiful BC .... where in waterloo is there a sweet fiber line?! the school internet was such a slug

07-13-2009, 08:51 AM	#15
digitaddict Forum Member Join Date: Jun 2007 Location: quebec Photos: Gallery Posts: 75	Hello I find your video test verry interresting. I tink its a great way for new photographer to understand focus VS DOF.... I must add... Im amazed by the thin DOF of the 77 ltd. Thanks for sharing. marc

K-7 Movie tests with 4 different primes

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