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Thread: Samyang 8mm Fisheye Canon APS-C

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nullend_void

Posts: 15
Location: Philippines
Registered: 18 Feb 2010
Re: Samyang 8mm Fisheye Canon APS-C
Posted: 25 Feb 2010 at 18:13 GMT
How does the lens perform indoors? I'm thinking of using it to take the interior of a car.
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Smooth

Posts: 4310
Location: Mount Panorama, Australia
Registered: 21 Jul 2004
Re: Samyang 8mm Fisheye Canon APS-C
Posted: 20 Mar 2010 at 19:32 GMT

nullend_void said:

How does the lens perform indoors? I'm thinking of using it to take the interior of a car.
Performs well, no problems at all.

On a different note: Just to show the variants of this lens and how it is marketed throughout the world here is a compilation of just some.

Regards, Smooth cool
www.smooth360.info
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Hans Nyberg

Posts: 2874
Location: Denmark
Registered: 28 Aug 2005
Re: Samyang 8mm Fisheye Canon APS-C
Posted: 20 Mar 2010 at 20:37 GMT
I would feel very uncomfortable with the Bower.
They seems to have got it all backwards.

I have Sigma, Nikon, Canon, Pentax, Tamron and Tokina lenses but I never seen that before.

Maybe it is for the Chinese/Japanese market. No that can't be, they read from right to left.
So it must be us doing it all wrong when all our lenses reads aperture / focus from right to left. laugh

But of course Nikon does it all wrong also when you have to turn the "wrong way" to mount the lens. confused

Hans
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Smooth

Posts: 4310
Location: Mount Panorama, Australia
Registered: 21 Jul 2004
Re: Samyang 8mm Fisheye Canon APS-C
Posted: 21 Mar 2010 at 4:55 GMT

Hans Nyberg said:

I would feel very uncomfortable with the Bower.
They seems to have got it all backwards.
You will note that the image of the Bower shows it's a Sony Alpha mount. That should explain a lot.

Regards, Smooth cool
www.smooth360.info
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jannefoo

Posts: 61
Location: Finland
Registered: 3 Jun 2009
Re: Samyang 8mm Fisheye Canon APS-C
Posted: 21 Mar 2010 at 20:36 GMT
Nifty little lens: I can cover 360x180 degrees with just 5 shots (4 @ +20 degrees and 90 degrees apart). Of course the fifth is off-axis nadir and is patched in with hugin 2010.1.0's XYZ parameters.
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Judy-A

Posts: 582
Location: Edmonton, Canada
Registered: 20 Jan 2010
Re: Samyang 8mm Fisheye Circular Cropping
Posted: 27 Mar 2010 at 20:24 GMT
Smooth, thanks so much for your generous advice here and on your web site. I've learned a lot from you.

Have you tried doing a circular crop to remove the corners from your fisheye images when stitching?

I have the Samyang 8mm fisheye on Nikon D5000, which has a DX (APS-C) sized sensor.

In Autopano Pro, circular cropping gives very good results. In the Image Properties>Circular Crop I set the crop circle so it sits just within the longer dimensions of the images. A radius half the longer dimension of the image does the trick. Center it at 0, 0. Select ‘Apply to all images’.



Even though there's image data to the corners of the shots, I find it's not needed. There’s still plenty of image overlap. Circular cropping speeds up control point detection, preview display and rendering with Smartblend.

Judy
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Smooth

Posts: 4310
Location: Mount Panorama, Australia
Registered: 21 Jul 2004
Re: Samyang 8mm Fisheye Circular Cropping
Posted: 28 Mar 2010 at 6:03 GMT
G'day Judy,

I must say when I read your post I thought this doesn't seem right. It must effect the final results if you are cropping the corners. But before answering, I thought it only right that I test your theory.

So I followed your description:

Also stitch the same set but left the fullframe crop circle:

The results are as follows:

Really you achieve nothing but making the final image smaller (in this case I didn't shoot a nadir). You can also see the Global RMS is worse with the cropped panorama (top).

As for the "speed" of control point detection, I didn't really notice and difference but I didn't time it either.

To surmise, I don't think any speed benefit outweighs the loss of final image size. But if you take all this into consideration and feel you get a benefit from it, then go for it.

As a general rule I use PTGui Pro for stitching. But APP is a capable stitcher and until we try these things we just don't know.

Thank you for the kind words.

Regards, Smooth cool
www.smooth360.info
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dbur

Posts: 14
Location: United States
Registered: 14 Nov 2009
Re: Samyang 8mm Fisheye Canon APS-C
Posted: 1 Apr 2010 at 1:10 GMT
updated: 1 Apr 2010 at 1:11 GMT
I have the Bower for Canon and it looks exactly like the Samyang. Like the other guy said, that Bower photo posted by Smooth appears to have a different mount on it.
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Smooth

Posts: 4310
Location: Mount Panorama, Australia
Registered: 21 Jul 2004
Re: Samyang 8mm Fisheye Canon APS-C
Posted: 5 Apr 2010 at 13:35 GMT
The lens of many names!

Here it is again badged as a Walimex Pro


Regards, Smooth cool
www.smooth360.info
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GoGoPaulo

Posts: 25
Location: Matosinhos, Portugal
Registered: 31 Oct 2007
Re: Samyang 8mm Fisheye Canon APS-C
Posted: 5 Apr 2010 at 14:07 GMT
HaHa, never seen the Walimex one laugh

But it was bound to happen, now I'm waiting for a Jessops one :P
Or better yet a blank one with no brand at all... Thant would be fun wink
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Smooth

Posts: 4310
Location: Mount Panorama, Australia
Registered: 21 Jul 2004
Re: Samyang 8mm Fisheye Canon APS-C
Posted: 5 Apr 2010 at 14:45 GMT

GoGoPaulo said:

Or better yet a blank one with no brand at all... Thant would be fun wink
Already exists! cgi.ebay.com.au/8mm-f-3-5-Fisheye-Lens-for-Canon-...

Regards, Smooth cool
www.smooth360.info
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GoGoPaulo

Posts: 25
Location: Matosinhos, Portugal
Registered: 31 Oct 2007
Re: Samyang 8mm Fisheye Canon APS-C
Posted: 5 Apr 2010 at 16:11 GMT

Smooth said:

GoGoPaulo said:

Or better yet a blank one with no brand at all... Thant would be fun wink
Already exists! cgi.ebay.com.au/8mm-f-3-5-Fisheye-Lens-for-Canon-...

LOL I stand corrected then :P
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badders

Posts: 387
Location: East Kilbride, United Kingdom
Registered: 5 Dec 2007
Re: Samyang 8mm Fisheye Canon APS-C
Posted: 5 Apr 2010 at 18:24 GMT
If you look closely you can see the Photoshop'ing out of where the white lettering was...

Andrew Baddeley
www.360tacticalvr.com
stores.ebay.co.uk/360tacticalvr
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Bob Stone

Posts: 387
Location: Rochester, NY, United States
Registered: 20 Oct 2007
Re: Samyang 8mm Fisheye Canon APS-C
Posted: 5 Apr 2010 at 21:50 GMT
Yes, Seems like EVERYONE wants a piece of this lens...

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Itamar Vieira

Posts: 33
Location: Brazil
Registered: 9 Mar 2010
Re: Samyang 8mm Fisheye Canon APS-C
Posted: 14 Apr 2010 at 0:40 GMT
Unfortunately, www.vrwave.com doesn't have SamYang data in lens database.

If you would update this site, what numbers you would provide:

This fisheye lens ...
Min. shots (full frame): ...
Recommended (1.3x, 1.5x, 1.6x): ...

Thanks !
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