Forum:
Q & A
Thread:
Peleng 3.5 8mm VS Sigma 3.5 8mm
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Forum:
Q & A
Thread:
Sigma 8mm f/3.5 focus question
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Re: Sigma 8mm f/3.5 focus question
Posted: 17 Jun 2008 at 6:07 GMT
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In a series of tests I performed with my Sigma 8mm 3.5, I found the sharpest focus on my lens was at the 1 meter mark. This mark made a noticeable difference in sharpness- and is more even more critical in finding sharp focus on my lens than which aperature I am using.
-Mike Jensen
www.jensenvideo.com
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Forum:
Tips & Tricks
Thread:
Focusing the Sigma 8/3.5
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Re: Focusing the Sigma 8/3.5
Posted: 8 Apr 2008 at 18:55 GMT
updated: 8 Apr 2008 at 18:58 GMT
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Thanks so much for your tests.
I also have the Sigma 8mm 3.5, and have run some tests this morning. My lens is sharpest dead on at the 1m focus mark- getting softer towards 0.5 and again towards the infinity mark. I was amazed that adjusting these small focusing increments (from .5 to infinity) made MORE difference in the image sharpness than the fstop! At the 1m mark, I now have a sharp lens
Mike Jensen
Jensen Wedding Films
www.JensenVideo.com
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Forum:
Tips & Tricks
Thread:
Motion Panoramas / seasonal time lapse panorama movie
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Re: Motion Panoramas / seasonal time lapse panorama movie
Posted: 9 Nov 2007 at 0:59 GMT
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Just beautiful, Jeff.
I especially like the tree cut down near the bridge!
The pano changes to a white screen after viewing for a minue or two... 
Mike Jensen
Jensen Wedding Films
www.jensenvideo.com
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Forum:
Q & A
Thread:
How many shots around for Canon 20D and Canon 15mm lens?
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How many shots around for Canon 20D and Canon 15mm lens?
Posted: 11 Oct 2007 at 23:11 GMT
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Have a friend with this combo. I need to know how many shots around (or rows) it would take for a 180x360 pano... I don't believe the 20D is full frame.
Thanks,
Mike Jensen
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Forum:
Q & A
Thread:
warped roof?
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Re: warped roof?
Posted: 31 Aug 2007 at 4:50 GMT
updated: 31 Aug 2007 at 4:57 GMT
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Wow- I'm humbled  getting advice from 2 of the 'Pano Gods,' Thanks guys! For some reason PTGUi was giving me a final output that was not 2:1, I may have had the slider down in the editor (probably pilot error). Anyway, I think it turned out great - save a few messy photoshop touchups.
www.jensenvideo.com/PTMac/SF/Sumetanon.html
A fun polar pano can be found here:
www.sacramentowedding.blogspot.com/
Thanks again,
-Mike
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Forum:
Q & A
Thread:
d40x and 10.5
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Re: d40x and 10.5
Posted: 29 Aug 2007 at 23:36 GMT
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6 around...
I use a combination of noise ninja- a photoshop plugin from PictureCode and the photoshop smart sharpen filter.
I use mostly autofocus- doesn't matter too much with this lens. I can't remember the exposure info- I usually shoot around f4, but optimum I believe is f8.
-Mike
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Forum:
Q & A
Thread:
warped roof?
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warped roof?
Posted: 29 Aug 2007 at 23:20 GMT
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Using PTGui w/10.5, auto EXIF data, 6 shot around. Most of the pano looks fine, even in photoshop. but when brought into CubicConverter, the roof above the Wedding party is warped.
www.jensenvideo.com/movies/test.mov
Any clues?
Thanks,
Mike Jensen
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Forum:
Q & A
Thread:
Best flash for circular panos.
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Re: Best flash for circular panos.
Posted: 21 Aug 2007 at 21:18 GMT
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Mike,
Have you ever thought of using a bare bulb flash to get full coverage?
-Mike
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Forum:
Q & A
Thread:
d40x and 10.5
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Forum:
Q & A
Thread:
Best flash for circular panos.
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Best flash for circular panos.
Posted: 21 Aug 2007 at 14:55 GMT
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We are using a Nikon D50 with a 10.5mm fisheye (I will be also getting the Sigma 8mm). We are now using an off-brand flash that just isn't giving enough power in large darkened rooms. What do you suggest as a replacement that would both give plenty of power and a reasonable recycle time and the wide angle coverage I need (for wedding reception panos). I am considering the Nikon SB-800 flash.
Thanks,
Mike
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Forum:
Q & A
Thread:
Can't use PTGUi Mac with Fisheye Lenses
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Forum:
Q & A
Thread:
Can't use PTGUi Mac with Fisheye Lenses
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Can't use PTGUi Mac with Fisheye Lenses
Posted: 5 Jul 2007 at 22:19 GMT
updated: 5 Jul 2007 at 22:30 GMT
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In an attempt to get PTGui to stitch images from my Sigma 8mm lens, I have downloaded several versions of panotools- including some older versions (2.2, 2.8), and none seems to work with PTGUi. I get "The PTGui stitcher does not support source images with field of view of 100 degrees or more..."
I have also tried to manually set several panotools versions in preferences under the panorama tools tab with no luck
Any clues would be appreciated.
Mike Jensen
OSX 10.4
PTGui6.0.3
Sigma 8mm & Nikon 10.5mm Lenses
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Forum:
Q & A
Thread:
Very Cool 3D Panos
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Forum:
Q & A
Thread:
D50 or D80?
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Re: D50 or D80?
Posted: 16 Feb 2007 at 0:14 GMT
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I guess the question is not whether the image will be larger, but will it be sharper with the D80 over the D50 in a QTVR full frame panorama?
Thanks,
Mike
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