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Next PZ lens test report: Samyang 7.5mm f/3.5 Fisheye (MFT)
#1
Hi Zoners,



it's time for a new mft lens test...

[url="http://www.opticallimits.com/olympus--four-thirds-lens-tests/714-samyang7535"]http://www.opticallimits.com/olympus--four-thirds-lens-tests/714-samyang7535[/url]



I love this lens! <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/smile.gif' class='bbc_emoticon' alt='Smile' />



Bye,



Sebastian
#2
Thanks for the review.



I'm surprised—but pleased!—to read that this lens uses a near-stereographic projection. After lenstip did their review, I contacted them about this issue and they reported that they believed it uses an equi-solid angle projection. I must say that the samples I've seen from the m4/3 Samyang don't look quite as "stereoscopic" as those from their APS-C fisheye. Are you sure about the near-stereoscopic projection, or is it possible that it's just not as "near" as the APS-C lens? Unfortunately I've never seen a direct comparison between the Samyang and Panasonic fisheyes, or the Samyang m4/3 and APS-C fisheyes, to compare their projections.
#3
yes the lens looks lovely - the pictures are very nice



..... must go into the shop and try one of these little things for those lighter and more discreet moments, ta sibbi
#4
How was the focus scale accuracy? A lot of the APS-C Samyang 8mm fish-eye lenses were quite a bit off, and needed a simple adjustment to adjust the focus ring distance scale to the actual distance. At f3.5 this did make a visible difference with my lens.
#5
[quote name='photonius' timestamp='1328787513' post='15739']

How was the focus scale accuracy? A lot of the APS-C Samyang 8mm fish-eye lenses were quite a bit off, and needed a simple adjustment to adjust the focus ring distance scale to the actual distance. At f3.5 this did make a visible difference with my lens.

[/quote]



Are you sure this is the lens and not the body? I am actually wondering whether µFT bodies have no precise register. I have an Oly 12/2, the only m.Zuiko with a distance scale. Mine is reasonable accurate on my body, but reading the manual, I got the impression that is not to be relied on. There are reports about lenses being out of spec on the web. Also, the lens can be turned a fair amount past infinity, which makes sure infinity focus can be achieved.
enjoy
#6
[quote name='Sebastian' timestamp='1328737982' post='15719']

Hi Zoners,



it's time for a new mft lens test...

[url="http://www.opticallimits.com/olympus--four-thirds-lens-tests/714-samyang7535"]http://www.photozone...714-samyang7535[/url]



I love this lens! <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/smile.gif' class='bbc_emoticon' alt='Smile' />



Bye,



Sebastian

[/quote]



Hi Sebastian,



When working at PZ, do you get a trip to NY with every µFT lens you test? <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='Wink' /> Many of the samples here and of the m.Zuiko 45/1.8 were taken there.



Thanks for the report. I read it with a lot of interest.



Joachim
enjoy
#7
My APS-C Samyang 8mm fisheye distance scale was way out of whack too. Focusing at infinity, the scale was showing 0.7m. Not even close. I couldn't reach the specified MFD either. Only later I found out you can undo some screws and re-align the focus ring, which I did. Infinity was now at infinity, and I could finally reach MFD.



Bear in mind the very short focal length of the lens, I suspect it is far more sensitive to extension effects than most other lenses. If the mount is even a fraction of a mm off, that could cause a very significant focus shift.
<a class="bbc_url" href="http://snowporing.deviantart.com/">dA</a> Canon 7D2, 7D, 5D2, 600D, 450D, 300D IR modified, 1D, EF-S 10-18, 15-85, EF 35/2, 85/1.8, 135/2, 70-300L, 100-400L, MP-E65, Zeiss 2/50, Sigma 150 macro, 120-300/2.8, Samyang 8mm fisheye, Olympus E-P1, Panasonic 20/1.7, Sony HX9V, Fuji X100.
#8
[quote name='ginsbu' timestamp='1328743188' post='15724']

Thanks for the review.



I'm surprised—but pleased!—to read that this lens uses a near-stereographic projection. After lenstip did their review, I contacted them about this issue and they reported that they believed it uses an equi-solid angle projection. I must say that the samples I've seen from the m4/3 Samyang don't look quite as "stereoscopic" as those from their APS-C fisheye. Are you sure about the near-stereoscopic projection, or is it possible that it's just not as "near" as the APS-C lens? Unfortunately I've never seen a direct comparison between the Samyang and Panasonic fisheyes, or the Samyang m4/3 and APS-C fisheyes, to compare their projections.

[/quote]



Hi, well it's just "near" stereographic... will try to make it more clear in the review.
#9
[quote name='joachim' timestamp='1328792554' post='15745']

Hi Sebastian,



When working at PZ, do you get a trip to NY with every µFT lens you test? <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='Wink' /> Many of the samples here and of the m.Zuiko 45/1.8 were taken there.



Thanks for the report. I read it with a lot of interest.



Joachim

[/quote]



Unfortunately not, but it sounds like a good idea - Klaus? <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/cool.gif' class='bbc_emoticon' alt='B)' />
#10
[quote name='photonius' timestamp='1328787513' post='15739']

How was the focus scale accuracy? A lot of the APS-C Samyang 8mm fish-eye lenses were quite a bit off, and needed a simple adjustment to adjust the focus ring distance scale to the actual distance. At f3.5 this did make a visible difference with my lens.

[/quote]



Hi, the focus scale accuracy of our sample was perfectly fine <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/mellow.gif' class='bbc_emoticon' alt=':mellow:' />
  


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