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Thread started 03 Mar 2010 (Wednesday) 09:29
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Samyang/Rokinon 8 mm f/3.5 Aspherical IF MC Fish-eye

 
drigo
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Sep 16, 2015 18:57 |  #1621

roseyposey wrote in post #17710391 (external link)
Ok I had read somewhere sharpest at f/8, must watch the skies for a suitable night.

Thanks

depending on light pollution,you wanna be around 2500-5000 iso (maybe even 6400) and anywhere between 20-30 seconds for your exposure..


7D/10-22/70-200L f/2.8/ 50 f/1.8 / Rokinon 8mm fisheye / 

  
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maverick75
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Sep 16, 2015 20:12 |  #1622

roseyposey wrote in post #17710391 (external link)
Ok I had read somewhere sharpest at f/8, must watch the skies for a suitable night.

Thanks

For astro stuff you don't get the luxury of shooting with small apertures due to star trails. There is a way around it but it requires purchasing an expensive tracker.


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roseyposey
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Sep 16, 2015 20:47 |  #1623

maverick75 wrote in post #17710465 (external link)
For astro stuff you don't get the luxury of shooting with small apertures due to star trails. There is a way around it but it requires purchasing an expensive tracker.

OK - hope I don't get too much noise - my processing skills aren't that great :oops:


Panasonic G9: Panasonic Vario 14 -140 f/3.5-5.6: Leica 8 -18 f/2.8-4
Canon M5: A variety of Canon, Sigma, Tamron, Tokina, prime and zoom lenses, Samyang fisheye, 2 lovely Minolta MD, and just for fun a Helios 44-2 58m.
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urbanfreestyle
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Sep 17, 2015 01:06 |  #1624

maverick75 wrote in post #17710465 (external link)
For astro stuff you don't get the luxury of shooting with small apertures due to star trails. There is a way around it but it requires purchasing an expensive tracker.

I thought with a lens this wide you wouldn't have too much of an issue with trailing?

Using the 500 rule: 500 Divided By the Focal Length of Your Lens = The Longest Exposure (in Seconds) Before Stars Start to “Trail”

Samyang 8mm: 500/8=62.5s
Canon 50mm: 500/50=10s

so you have up to a min regardless of the aperture. You could run f8 at 60s and adjust the iso as needed. I think there is a sweet spot between high iso noise and long exposure noise. I just need to work it out.


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roseyposey
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Sep 17, 2015 01:47 |  #1625

urbanfreestyle wrote in post #17710723 (external link)
I thought with a lens this wide you wouldn't have too much of an issue with trailing?

Using the 500 rule: 500 Divided By the Focal Length of Your Lens = The Longest Exposure (in Seconds) Before Stars Start to “Trail”

Samyang 8mm: 500/8=62.5s
Canon 50mm: 500/50=10s

so you have up to a min regardless of the aperture. You could run f8 at 60s and adjust the iso as needed. I think there is a sweet spot between high iso noise and long exposure noise. I just need to work it out.

Be interested to see what you come up. Bit cloudy tonight - think bad weather on it's way.


Panasonic G9: Panasonic Vario 14 -140 f/3.5-5.6: Leica 8 -18 f/2.8-4
Canon M5: A variety of Canon, Sigma, Tamron, Tokina, prime and zoom lenses, Samyang fisheye, 2 lovely Minolta MD, and just for fun a Helios 44-2 58m.
Rose
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"Dance among the moonbeams, feel the magic in the air."

  
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urbanfreestyle
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Sep 17, 2015 02:36 as a reply to  @ roseyposey's post |  #1626

we have bad weather coming in here too Hopefully it is dry tonight as i want to try out some super wide night shots in my home city. If the skies are clear i'll try to get out and do some star shooting.


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roseyposey
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Sep 17, 2015 04:29 |  #1627

A few from today at Haumoana:

IMAGE: https://farm1.staticflickr.com/719/21299378940_7ce1c2d63e_b.jpg
IMAGE LINK: https://flic.kr/p/ys9T​io  (external link) IMG_0482 Haumoana whitebait stand Samyang (external link) by Rose McGillicuddy (external link), on Flickr

IMAGE: https://farm6.staticflickr.com/5642/21299379000_e6c5af9eba_b.jpg
IMAGE LINK: https://flic.kr/p/ys9T​jq  (external link) IMG_0485-2. Lines in cloud reflections (external link) by Rose McGillicuddy (external link), on Flickr

IMAGE: https://farm1.staticflickr.com/658/21299379080_8a33d85447_b.jpg
IMAGE LINK: https://flic.kr/p/ys9T​kN  (external link) IMG_0490 Haumoana whitebait stand (external link) by Rose McGillicuddy (external link), on Flickr

Panasonic G9: Panasonic Vario 14 -140 f/3.5-5.6: Leica 8 -18 f/2.8-4
Canon M5: A variety of Canon, Sigma, Tamron, Tokina, prime and zoom lenses, Samyang fisheye, 2 lovely Minolta MD, and just for fun a Helios 44-2 58m.
Rose
http://www.flickr.com/​photos/rose_mcgillicud​dy/ (external link)
"Dance among the moonbeams, feel the magic in the air."

  
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roseyposey
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Sep 17, 2015 04:33 |  #1628

And a cropped version - almost not fish eyeish :-)

IMAGE: https://farm1.staticflickr.com/743/21299470620_6927110206_b.jpg
IMAGE LINK: https://flic.kr/p/ysam​y5  (external link) IMG_0487-2 Haumoana Tukituki river (external link) by Rose McGillicuddy (external link), on Flickr

Panasonic G9: Panasonic Vario 14 -140 f/3.5-5.6: Leica 8 -18 f/2.8-4
Canon M5: A variety of Canon, Sigma, Tamron, Tokina, prime and zoom lenses, Samyang fisheye, 2 lovely Minolta MD, and just for fun a Helios 44-2 58m.
Rose
http://www.flickr.com/​photos/rose_mcgillicud​dy/ (external link)
"Dance among the moonbeams, feel the magic in the air."

  
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urbanfreestyle
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Sep 18, 2015 02:53 as a reply to  @ roseyposey's post |  #1629

Took a few last night
These are two of my favorites :-)

IMAGE: https://farm6.staticflickr.com/5631/21480807206_baa339a017_c.jpg
IMAGE LINK: https://flic.kr/p/yJbK​AW  (external link) _D3_4270-Edit (external link) by Geoff Palmer (external link), on Flickr

IMAGE: https://farm6.staticflickr.com/5673/21515687491_95548726e0_c.jpg
IMAGE LINK: https://flic.kr/p/yMgw​ia  (external link) _D3_4243 (external link) by Geoff Palmer (external link), on Flickr

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pknight
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Sep 22, 2015 21:56 |  #1630

DGStinner wrote in post #17694594 (external link)
There's a lens profile in Lr which "corrects" the distortion from the fisheye.

This is true, but that profile will distort the edges (e.g., if it were a picture of the night sky, the stars on the edges would not be points, but short lines; people on the edge would look stretched out). It will also cut off quite a bit of the image, giving you a much narrower FOV that what you started with.

A $30 plug-in for Photoshop called Fisheye Hemi avoids this distortion, and loses very little of the image. It was designed specifically to de-fish while not distorting people on the sides of the image. It corrects only on one axis (parallel to the short edge of the image). There is a video tutorial at www.lonleyspeck.com (external link) that compares de-fishing with a profile vs. Fisheye Hemi, and shows how to get results very similar to Hemi using the Warp tool in PS. It also shows how to trick Hemi into correcting distortion on both axes.


Digital EOS 7D Mark II Canon: EF 50mm f/1.8 II, EF 50mm f/2.5 Compact Macro, Life-Size Converter EF Tamron: SP 17-50mm f/2.8 DiII, 18-400mm f/3.5-6.3 DiII VC HLD, SP 150-600 f/5-6.3 Di VC USD G2, SP 70-200 f/2.8 Di VC USD, 10-24mm f/3.5-4.5 DiII VC HLD Sigma: 30mm f/1.4 DC Art Rokinon: 8mm f/3.5 AS IF UMC

  
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pknight
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Sep 22, 2015 22:01 |  #1631

urbanfreestyle wrote in post #17695785 (external link)
I have heard of chipping lenses on Nikon but not sure if you can do it with the canon one.

Some Nikon models come already chipped. You can purchase chips for the Canon models on eBay for $10 or less. You just glue it to the lens mount.


Digital EOS 7D Mark II Canon: EF 50mm f/1.8 II, EF 50mm f/2.5 Compact Macro, Life-Size Converter EF Tamron: SP 17-50mm f/2.8 DiII, 18-400mm f/3.5-6.3 DiII VC HLD, SP 150-600 f/5-6.3 Di VC USD G2, SP 70-200 f/2.8 Di VC USD, 10-24mm f/3.5-4.5 DiII VC HLD Sigma: 30mm f/1.4 DC Art Rokinon: 8mm f/3.5 AS IF UMC

  
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urbanfreestyle
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Sep 22, 2015 22:05 as a reply to  @ pknight's post |  #1632

DO YOU HAVE A LINK!? I need this in my life!!!!


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pknight
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Sep 22, 2015 22:29 |  #1633

urbanfreestyle wrote in post #17718196 (external link)
DO YOU HAVE A LINK!? I need this in my life!!!!

Just go to eBay and search for "Canon AF chip." They start at $5.30, IIRC. Run the same search on YouTube for videos on how to install it.


Digital EOS 7D Mark II Canon: EF 50mm f/1.8 II, EF 50mm f/2.5 Compact Macro, Life-Size Converter EF Tamron: SP 17-50mm f/2.8 DiII, 18-400mm f/3.5-6.3 DiII VC HLD, SP 150-600 f/5-6.3 Di VC USD G2, SP 70-200 f/2.8 Di VC USD, 10-24mm f/3.5-4.5 DiII VC HLD Sigma: 30mm f/1.4 DC Art Rokinon: 8mm f/3.5 AS IF UMC

  
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pablo0105
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Sep 24, 2015 18:03 |  #1634

Only had this lens for a month or so but love it, so sharp!

IMAGE: https://farm6.staticflickr.com/5778/21644953171_54f28a8266_c.jpg
IMAGE LINK: https://flic.kr/p/yYG3​tM  (external link) Bermuda 2015 (external link) by Paul Roberts (external link), on Flickr

IMAGE: https://farm6.staticflickr.com/5772/21014847033_b66c880029_c.jpg
IMAGE LINK: https://flic.kr/p/y21z​SR  (external link) Bermuda 2015 (external link) by Paul Roberts (external link), on Flickr

IMAGE: https://farm6.staticflickr.com/5647/20929426163_a13db34643_c.jpg
IMAGE LINK: https://flic.kr/p/xTsM​ee  (external link) JFK Fisheye (external link) by Paul Roberts (external link), on Flickr

IMAGE: https://farm1.staticflickr.com/376/19926803956_2d59898bf3_c.jpg
IMAGE LINK: https://flic.kr/p/wmS5​zs  (external link) Liverpool Museum (external link) by Paul Roberts (external link), on Flickr

IMAGE: https://farm1.staticflickr.com/317/19330436264_7e5e1fd8b5_c.jpg
IMAGE LINK: https://flic.kr/p/vsax​eS  (external link) St Nichols Church (external link) by Paul Roberts (external link), on Flickr

Sony A7 | Canon 5D | Nikon 20mm 3.5 | Samyang 35mm 1.4 | Nikon 50mm 1.2 | Canon 50mm 1.8 ii |Canon 85mm 1.8 | | Tamron 90mm 2.5 | Sigma 180mm 3.5 macro | Canon 70 200 f4 L
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urbanfreestyle
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Sep 24, 2015 18:10 as a reply to  @ pablo0105's post |  #1635

Any Recommendations for using this lens in panorama? any samples?


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